Voltage regulation circuit, device and method

Abstract

A voltage regulation circuit, device, and method, relating to the field of electronic technology, are disclosed for reducing voltage regulation time and improving system response and user experience. The voltage regulation circuit (1) includes: a first power supply circuit (11) for receiving a voltage setting signal (S). SET ), and set the signal (S) according to the voltage. SET ), and the first feedback voltage (V) F1 ) and the second feedback voltage (V F2 The difference between the two voltages is used to output the first supply voltage (V1) and the second reference voltage (V). REF2 The first feedback voltage (V) F1 ) is used to reflect the first supply voltage (V1) and the second feedback voltage (V F2 The second power supply circuit (12) is used to reflect the second supply voltage (V2); the second power supply circuit (12) is used to adjust the second reference voltage (V2) according to the second reference voltage (V2). REF2 The second supply voltage (V2) is output.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a voltage regulation circuit, device and method. Background Technology

[0002] Dynamic voltage scaling (DVS) is a technique that dynamically adjusts the voltage of each power domain of a chip based on its power load. To minimize chip power consumption, it's necessary to reduce the supply voltage of each power domain as much as possible while still meeting the chip's operational requirements. For typical processor loads, such as... Figure 1 As shown in the upper part, ideally, the supply voltage should closely match the demand voltage for optimal performance. However, in reality, due to the speed of voltage regulation, the supply voltage cannot accurately track the demand voltage, resulting in some energy waste. Specifically, as shown in the upper part... Figure 1 The lower half is shown.

[0003] For processor systems that include logic circuits and memory circuits, to achieve low-power design, the logic circuits and memory circuits are typically powered separately. The supply voltage V for the logic circuits... C The operating frequency can be adjusted to optimize energy efficiency, while the power supply voltage V of the storage circuit... M It typically has a narrow voltage range and cannot be stepped down. Because V M With V C There is a pressure difference constraint between them, thus affecting V C During voltage regulation, it is also necessary to adjust V. M Adjustments were made.

[0004] In the existing technology, in the case of V C and V M Voltage regulation is typically achieved through multi-step, alternating adjustments, that is, adjusting V sequentially in turn. C and V M To ensure V during the adjustment process C With V M The differential pressure constraint is met until the required voltage is reached. For example, ... Figure 2 As shown, V C The initial voltage is 0.6V, and the required voltage is 1V. M The initial voltage is 0.8V, and the voltage difference constraint is V. M -V C If the voltage is within the range of [0, 0.2V], then the multi-step alternating voltage regulation process can be described as follows: within time t1, V... C Adjust from 0.6V to 0.8V, and then within time t2, adjust V... M Adjust from 0.8V to 1V, and finally adjust V... CThe voltage is adjusted from 0.8V to 1V. In the diagram, ts represents the communication time for adjustment control, and the time between t1 and t2, and the time between t2 and t3, are the time required for the processor system to successfully adjust the voltage in each round.

[0005] However, when using this method to analyze V C and V M When regulating voltage, if V C The adjustment range is relatively large, such as V. C Modulating from 0.6V to 3V will result in V M With V C The presence of pressure difference constraints causes the above adjustment process to consume a lot of time, resulting in a response delay. Summary of the Invention

[0006] This application provides a voltage regulation circuit, device, and method to reduce voltage regulation time and improve system response and user experience. To achieve the above objectives, the embodiments of this application adopt the following technical solutions.

[0007] In a first aspect, a voltage regulation circuit is provided, comprising: a first power supply circuit for receiving a voltage setting signal and outputting a first supply voltage and a second reference voltage based on the voltage setting signal and the difference between a first feedback voltage and a second feedback voltage, wherein the first feedback voltage reflects the first supply voltage and the second feedback voltage reflects the second supply voltage; and a second power supply circuit for converting the second reference voltage into the second supply voltage.

[0008] Optionally, there may be a correlation between the difference between the first feedback voltage and the second feedback voltage and the difference between the first supply voltage and the second supply voltage, such as a positive correlation or a linear relationship. The difference between the first feedback voltage and the second feedback voltage can be within a preset range to ensure that the difference between the first supply voltage and the second supply voltage is within a certain preset range, such as within the voltage difference constraint range.

[0009] In the above technical solution, the adjustment of the first supply voltage is constrained by the difference between the first feedback voltage and the second feedback voltage. Since there is a correlation between the difference between the first feedback voltage and the second feedback voltage and the difference between the first supply voltage and the second supply voltage, and the second reference voltage used to generate the second supply voltage is generated by the first power supply circuit, the second supply voltage can change with the adjustment of the first supply voltage. The adjustment of the first supply voltage is constrained by the difference between the first feedback voltage and the second feedback voltage, ensuring that the difference between the first supply voltage and the second supply voltage is within the voltage difference constraint range. This ensures the continuity of voltage regulation, reduces voltage regulation time, and improves system response and user experience.

[0010] In one possible implementation of the first aspect, the first feedback voltage is equal to the first supply voltage, and the second feedback voltage is equal to the second supply voltage, so that the difference between the first feedback voltage and the second feedback voltage is the difference between the first supply voltage and the second supply voltage.

[0011] In one possible implementation of the first aspect, the first power supply circuit includes: a hysteresis comparator for outputting a first control signal based on the difference between a first feedback voltage and a second feedback voltage, the first control signal including a first signal or a second signal, the first signal indicating that the difference between the first feedback voltage and the second feedback voltage is within a preset difference range, and the second signal indicating that the difference between the first feedback voltage and the second feedback voltage exceeds the preset difference range; a voltage setting circuit for setting a first reference voltage based on the voltage setting signal when the first control signal is the first signal, or latching the first reference voltage when the first control signal changes from the first signal to the second signal; a conversion circuit for converting the first reference voltage into a first supply voltage; and an analog operation circuit for outputting a second reference voltage based on the first reference voltage or the first feedback voltage, wherein the first reference voltage or the first feedback voltage and the second reference voltage may have a positive correlation or a linear relationship within a certain voltage regulation stage, that is, the second reference voltage increases as the first reference voltage or the first feedback voltage increases, and decreases as the first reference voltage or the first feedback voltage decreases. In the above possible implementations, the first power supply circuit is constrained by the difference between the first feedback voltage and the second feedback voltage during the adjustment of the first supply voltage, thereby ensuring that the voltage difference constraint condition is met between the first supply voltage and the second supply voltage. In addition, the output of the second reference voltage based on the first reference voltage or the first feedback voltage can make the second reference voltage change with the change of the first reference voltage or the first feedback voltage, thereby ensuring the following performance of the adjustment of the second supply voltage when the second supply voltage is output based on the second reference voltage.

[0012] In one possible implementation of the first aspect, the voltage setting circuit includes: a digital voltage generation circuit, used to generate a digital voltage according to the voltage setting signal when the first control signal is a first signal, or to latch the digital voltage when the first control signal changes from the first signal to the second signal; and a digital-to-analog converter, used to convert the digital voltage into an analog voltage to obtain a first reference voltage. In the above possible implementation, if the difference between the first supply voltage and the second supply voltage exceeds or is about to exceed the differential voltage constraint range, the previous digital voltage can be latched, i.e., the adjustment of the first supply voltage can be paused, and the adjustment of the first supply voltage can continue after the second supply voltage has been adjusted to the appropriate level. This achieves coordinated adjustment of the first and second supply voltages, ensuring that the difference between the first and second supply voltages remains within the differential voltage constraint range, thereby ensuring the continuity of voltage adjustment, reducing voltage adjustment time, and improving system response and user experience.

[0013] In one possible implementation of the first aspect, the analog circuit includes a comparator and a multiplexer. The comparator compares a first reference voltage with a preset voltage to output a second control signal, which includes a third or fourth signal. For example, it outputs a third signal when the preset voltage is less than or equal to the first reference voltage, and a fourth signal when the preset voltage is greater than the first reference voltage. The multiplexer selects the difference between the first reference voltage and the bias voltage as the second reference voltage when the second control signal is the third signal, or selects a fixed voltage as the second reference voltage when the second control signal is the fourth signal. In the above possible implementation, by selecting the difference between the first reference voltage and the bias voltage as the second reference voltage when the preset voltage is less than or equal to the first reference voltage (in which case, the first reference voltage and the second reference voltage have a linear relationship), and selecting a fixed voltage as the second reference voltage when the preset voltage is greater than the first reference voltage, the second supply voltage output according to the second reference voltage can always be at the lowest value within the required range, thereby maximizing power saving.

[0014] In one possible implementation of the first aspect, the analog operational circuit includes: an operational amplifier, a first resistor, a second resistor, a third resistor, and a variable resistor; wherein one end of the first resistor is coupled to the negative input terminal of the operational amplifier, one end of the second resistor is coupled to the positive input terminal of the operational amplifier, the third resistor is coupled between the negative input terminal and the output terminal of the operational amplifier, and the variable resistor is coupled between the positive input terminal and ground; the other end of the first resistor is used to receive a first reference voltage, the other end of the second resistor is used to receive a bias voltage, and the output terminal of the operational amplifier is used to output a second reference voltage. The analog operational circuit provided by the above possible implementation is simple and effective, and the first reference voltage and the second reference voltage have a linear relationship.

[0015] Secondly, a voltage regulation device is provided, comprising a voltage regulation circuit provided in the first aspect or any possible implementation thereof, and a processor coupled to the voltage regulation circuit; wherein the processor is configured to generate a voltage setting signal, the voltage setting signal including a required voltage and a voltage regulation rate. In the above possible implementations, the processor can configure the voltage setting signal for the voltage regulation circuit according to the load conditions, thereby enabling the voltage regulation circuit to reasonably regulate the voltage, ensuring the continuity of voltage regulation, reducing the voltage regulation time, and thus improving the processor response speed and user experience.

[0016] In one possible implementation of the second aspect, the processor includes storage circuitry and logic circuitry, with a first supply voltage powering the logic circuitry and a second supply voltage powering the storage circuitry. These possible implementations ensure normal power supply to the logic circuitry and storage circuitry within the processor, thereby improving system response and user experience.

[0017] In one possible implementation of the second aspect, the processor is a system-on-a-chip (SoC).

[0018] Thirdly, a chip system is provided, the chip system including a system-on-a-chip (SoC) and a power supply chip for powering the SoC, the power supply chip including the voltage regulation circuit provided by the first aspect or any possible implementation of the first aspect.

[0019] Fourthly, an electronic device is provided, the electronic device including a circuit board, the circuit board including a system-on-a-chip (SoC) and a power supply chip for powering the SoC, the power supply chip including the voltage regulation circuit provided by the first aspect or any possible implementation of the first aspect.

[0020] Fifthly, a voltage regulation method is provided, applied in a voltage regulation circuit. The method includes: receiving a voltage setting signal, and outputting a first supply voltage and a second reference voltage based on the voltage setting signal and the difference between a first feedback voltage and a second feedback voltage, wherein the first feedback voltage reflects the first supply voltage and the second feedback voltage reflects the second supply voltage; and converting the second reference voltage into the second supply voltage.

[0021] In one possible implementation of the fifth aspect, there is a correlation between the difference between the first feedback voltage and the second feedback voltage and the difference between the first supply voltage and the second supply voltage. For example, ensuring that the difference between the first feedback voltage and the second feedback voltage is within a preset range guarantees that the difference between the first supply voltage and the second supply voltage is also within a certain preset range. Optionally, the first feedback voltage is equal to the first supply voltage, and the second feedback voltage is equal to the second supply voltage, thus the difference between the first feedback voltage and the second feedback voltage is the difference between the first supply voltage and the second supply voltage.

[0022] In one possible implementation of the fifth aspect, outputting a first supply voltage and a second reference voltage based on a voltage setting signal and the difference between a first feedback voltage and a second feedback voltage includes: outputting a first control signal based on the difference between the first feedback voltage and the second feedback voltage, the first control signal including a first signal or a second signal, the first signal indicating that the difference between the first feedback voltage and the second feedback voltage is within a preset difference range, and the second signal indicating that the difference between the first feedback voltage and the second feedback voltage exceeds the preset difference range; setting a first reference voltage based on a voltage setting signal when the first control signal is the first signal, or latching the first reference voltage when the first control signal changes from the first signal to the second signal; converting the first reference voltage into a first supply voltage; and outputting a second reference voltage based on the first reference voltage or the first feedback voltage, wherein the first reference voltage or the first feedback voltage is positively correlated with the second reference voltage, that is, the second reference voltage increases as the first reference voltage or the first feedback voltage increases, and decreases as the first reference voltage or the first feedback voltage decreases.

[0023] In one possible implementation of the fifth aspect, a digital voltage is generated according to a voltage setting signal when the first control signal is a first signal, or the digital voltage is latched when the first control signal changes from a first signal to a second signal; the digital voltage is converted into an analog voltage to obtain a first reference voltage.

[0024] In one possible implementation of the fifth aspect, outputting a second reference voltage based on a first reference voltage or a first feedback voltage includes: comparing the first reference voltage with a preset voltage to output a second control signal, the second control signal including a third signal and a fourth signal, for example, outputting a third signal when the preset voltage is less than or equal to the first reference voltage, and outputting a fourth signal when the preset voltage is greater than the first reference voltage; selecting the difference between the first reference voltage and the bias voltage as the second reference voltage when the second control signal is the third signal, or selecting a fixed voltage as the second reference voltage when the second control signal is the fourth signal.

[0025] In one possible implementation of the fifth aspect, the voltage regulation circuit is coupled to the processor, and the method further includes generating a voltage setting signal, which may include a demand voltage and a voltage regulation rate.

[0026] In one possible implementation of the fifth aspect, a voltage regulation circuit is coupled to a processor, which includes storage circuitry and logic circuitry, wherein a first supply voltage is used to power the logic circuitry and a second supply voltage is used to power the storage circuitry.

[0027] In one possible implementation of the fifth aspect, the processor is a system-on-a-chip (SoC).

[0028] Understandably, any of the voltage regulation devices, chip systems, and voltage regulation methods provided above are used to perform the functions of the corresponding voltage regulation circuits provided above. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects of the corresponding voltage regulation circuits provided above, and will not be repeated here. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a dynamic voltage adjustment.

[0030] Figure 2 This is a schematic diagram of a multi-step alternating voltage adjustment method;

[0031] Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of a voltage regulation circuit provided in an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the structure of a first power supply circuit provided in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of a conversion circuit provided in an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of another first power supply circuit provided in an embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the structure of an analog computing circuit provided in an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of another analog computing circuit provided in an embodiment of this application;

[0038] Figure 10 A schematic diagram of V1 and V2 during a voltage regulation process provided in an embodiment of this application;

[0039] Figure 11 A schematic diagram of a voltage setting circuit provided in an embodiment of this application;

[0040] Figure 12 A schematic diagram of a chip system provided in an embodiment of this application;

[0041] Figure 13 This is a schematic flowchart of a voltage regulation method provided in an embodiment of this application. Detailed Implementation

[0042] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0043] The embodiments of this application use terms such as "first" and "second" to distinguish objects with similar names, functions, or effects. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or order of execution. The term "coupling" is used to indicate an electrical connection, including direct connection via wires or terminals or indirect connection via other devices. Therefore, "coupling" should be considered as a broad type of electronic communication connection.

[0044] The technical solutions provided in this application can be applied to various electronic devices that require dynamic voltage adjustment. This dynamic voltage adjustment is a technique that dynamically adjusts the voltage of each power domain of a chip based on the load conditions of each power domain. To minimize chip power consumption, it is necessary to reduce the supply voltage of each power domain of the chip as much as possible while ensuring the chip's operational requirements. Specifically, for a typical processor load, when the processor load is light, the processor's supply voltage is reduced; when the processor load is heavy, the processor's supply voltage is increased, thereby reducing processor power consumption—a power-saving technique.

[0045] The aforementioned electronic devices may include, but are not limited to, personal computers, server computers, handheld or laptop devices, mobile devices (such as mobile phones, tablets, personal digital assistants, media players, etc.), wearable devices, in-vehicle devices, consumer electronic devices, minicomputers, mainframe computers, mobile robots, and drones. The specific structure of these electronic devices is described below.

[0046] Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application, using a mobile phone as an example for illustration. Figure 3 As shown, the electronic device may include: a memory 101, a processor 102, a sensor assembly 103, a multimedia assembly 104, a power supply 105, and an input / output interface 106.

[0047] The memory 101 can be used to store data, software programs, and software modules; it mainly includes a program storage area and a data storage area. The program storage area can store the operating system and application programs required for at least one function, such as sound playback or image playback. The data storage area can store data created based on the use of the electronic device, such as audio data, image data, or a phone book. Furthermore, the electronic device may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0048] The processor 102 is the control center of the electronic device. It connects various parts of the device via various interfaces and lines, and performs various functions and processes data by running or executing software programs and / or software modules stored in the memory 101, and by calling data stored in the memory 101, thereby providing overall monitoring of the electronic device. Optionally, the processor 102 may include one or more processing units. For example, the processor 102 may include a central processing unit (CPU), an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural network processing unit (NPU). Different processing units may be independent devices or integrated into one or more processors. In this embodiment of the application, when a fully integrated solution is adopted, the processor 102 can be a system of chip (SoC), which can include a storage circuit and logic circuits for accessing the storage circuit. The storage circuit can be on-chip random access memory (RAM) or cache.

[0049] Sensor assembly 103 includes one or more sensors for providing status assessments of various aspects of the electronic device. Sensor assembly 103 may include accelerometers, gyroscopes, magnetometers, pressure sensors, or temperature sensors. Sensor assembly 103 can detect acceleration / deceleration, orientation, on / off states, relative positioning of components, or temperature changes of the electronic device. Furthermore, sensor assembly 103 may also include optical sensors, such as CMOS or CCD image sensors, for use in imaging applications, i.e., becoming part of a camera.

[0050] Multimedia component 104 provides an output interface screen between the electronic device and the user. This screen can be a touch panel, and when it is a touch panel, it can be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. Furthermore, multimedia component 104 includes at least one camera, for example, a front-facing camera and / or a rear-facing camera. When the electronic device is in an operating mode, such as a shooting mode or video mode, the front-facing camera and / or rear-facing camera can receive external multimedia data. Each front-facing and rear-facing camera can be a fixed optical lens system or have focal length and optical zoom capabilities.

[0051] Power supply 105 is used to provide power to various components of the electronic device. Power supply 105 may include a power management system, one or more power supplies, or other components associated with the generation, management, and distribution of power by the electronic device. In this embodiment, power supply 105 may be a power chip, specifically including a first power circuit and a second power circuit. The first power circuit and the second power circuit can respectively provide different supply voltages to processor 102.

[0052] Input / output interface 106 provides an interface between processor 102 and peripheral interface modules, such as keyboards, mice, or universal serial bus (USB) devices.

[0053] Although not shown, the electronic device may also include audio components and communication components, such as a microphone for audio components and a wireless fidelity (WiFi) module or a Bluetooth module for communication components. These will not be elaborated further in the embodiments of this application. Those skilled in the art will understand that... Figure 3 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0054] Figure 4 This is a schematic diagram of a voltage regulation circuit 1 provided in an embodiment of this application. The voltage regulation circuit 1 can be coupled to the processor 2 to supply power to the processor 2. Specifically, it can be located in... Figure 1 The power supply 105 is located within the circuit; alternatively, the voltage regulation circuit 1 can be a separate component. For example... Figure 4 As shown, the voltage regulation circuit 1 may include: a first power supply circuit 11 and a second power supply circuit 12. The first power supply circuit 11 is used to receive a voltage setting signal S.SET And set signal S according to the voltage. SET and the first feedback voltage V F1 With the second feedback voltage V F2 The difference between them is used to output the first supply voltage V1 and the second reference voltage V. REF2 First feedback voltage V F1 Used to reflect the first supply voltage V1 and the second feedback voltage V F2 Used to reflect the second supply voltage V2; the second power supply circuit 12 is used to convert the second reference voltage V... REF2 It is converted to the second power supply voltage V2.

[0055] The processor 2 can be used to output the voltage setting signal S according to the load condition. SET So that the voltage regulation circuit 1 can use the voltage setting signal S SET The first supply voltage V1 and the second supply voltage V2 are dynamically adjusted by a voltage setting signal S. SET This can include the required voltage and voltage regulation rate corresponding to the first supply voltage V1. For example, when the load is light, the processor 2 can output a smaller voltage setting signal S. SET This causes the voltage regulation circuit 1 to reduce the first supply voltage V1 and the second supply voltage V2; under heavy load, the processor 2 can output a larger voltage setting signal S. SET This allows the voltage regulation circuit 1 to increase the first supply voltage V1 and the second supply voltage V2. Optionally, the processor 2 may include a storage circuit 21 and a logic circuit 22 for accessing the storage circuit 21. The first supply voltage V1 output by the first power supply circuit 11 can be used to power the logic circuit 22, and the second supply voltage V2 output by the second power supply circuit 12 can be used to power the storage circuit 21.

[0056] Furthermore, a voltage difference constraint can exist between the first supply voltage V1 and the second supply voltage V2. For example, this voltage difference constraint can be that the difference between V1 and V2 is within a preset difference range (e.g., [-200mV, 400mV]). During the adjustment of the first supply voltage V1 and the second supply voltage V2, the voltage regulation circuit 1 needs to ensure that the difference between the first supply voltage V1 and the second supply voltage V2 is within the preset difference range.

[0057] Optionally, the first feedback voltage V F1 With the second feedback voltage V F2 The difference between the first and second supply voltages V1 and V2 can be correlated, for example, positively correlated or linearly correlated. F1 With the second feedback voltage V F2The difference between the two voltages is kept within a preset range to ensure that the difference between the first supply voltage V1 and the second supply voltage V2 is within a certain preset range. A positive correlation between two parameters means that if one parameter increases, the other increases, or if one parameter decreases, the other decreases; that is, they exhibit the same trend of change. A linear relationship between two parameters means that the two parameters are related as a linear function, for example, the ratio of the two parameters is a constant.

[0058] The following uses the first feedback voltage V F1 Equal to the first supply voltage V1 and the second feedback voltage V F2 Let's take the second power supply voltage V2 as an example for explanation. When the first feedback voltage V... F1 Equal to the first supply voltage V1 and the second feedback voltage V F2 When the voltage is equal to the second supply voltage V2, the difference between the first supply voltage V1 and the second supply voltage V2 is guaranteed to be within a preset difference range, which is to ensure the first feedback voltage V F1 With the second feedback voltage V F2 The difference between them is within a preset difference range, such as the differential pressure constraint range. It should be noted that the aforementioned first feedback voltage V... F1 The relationship with the first supply voltage V1 and the second feedback voltage V F2 The relationship between the feedback voltage and the second supply voltage V2 is merely illustrative. In practical applications, the relationship between the feedback voltage and the supply voltage can be different, for example, the first feedback voltage V2... F1 The second feedback voltage V is equal to the first supply voltage V1 minus or plus a certain fixed value. F2 The value is equal to the second power supply voltage V2 minus or plus a certain fixed value, etc., but the embodiments of this application do not impose specific limitations on this.

[0059] Specifically, during the process of adjusting the first supply voltage V1 and the second supply voltage V2, the first power supply circuit 11 can set the signal S according to the voltage. SET and the first feedback voltage V F1 With the second feedback voltage V F2 The difference between them is used to output the first supply voltage V1 and the second reference voltage V. REF2 The second power supply circuit 12 is used to convert the second reference voltage V REF2 The voltage is then converted to a second supply voltage V2. That is, during the above voltage regulation process, the regulation of the first supply voltage V1 is influenced by the first feedback voltage V. F1 With the second feedback voltage V F2 The constraint of the difference between them, due to the first feedback voltage V F1 With the second feedback voltage V F2The difference between them is correlated with the difference between the first supply voltage V1 and the second supply voltage V2, and the second reference voltage V used to output the second supply voltage V2 is related. REF2 It is generated by the first power supply circuit 11, so that the second power supply voltage V2 can change in accordance with the adjustment of the first power supply voltage V1, and through the first feedback voltage V F1 With the second feedback voltage V F2 The difference between the first and second power supply voltages constrains the adjustment rate of the first power supply voltage V1, ensuring that the difference between the first power supply voltage V1 and the second power supply voltage V2 is within the voltage difference constraint range. This ensures the continuity of voltage regulation, reduces voltage regulation time, and thus improves processor performance and user experience.

[0060] In one possible embodiment, such as Figure 5 As shown, the first power supply circuit 11 may include: a hysteresis comparator 111, a voltage setting circuit 112, a conversion circuit 113, and an analog processing circuit 114. The two input terminals of the hysteresis comparator 111 can be used to receive the first feedback voltage V. F1 Second feedback voltage V F2 The output of the hysteresis comparator 111 is coupled to the first input of the voltage setting circuit 112. The second input of the voltage setting circuit 112 can be used to receive the voltage setting signal S. SET The first output terminal of the voltage setting circuit 112 is coupled to the input terminal of the conversion circuit 113, and the second output terminal of the voltage setting circuit 112 is coupled to the input terminal of the analog processing circuit 114. The output terminal of the conversion circuit 113 is used to output the first supply voltage V1. The output terminal of the analog processing circuit 114 is used to output the second reference voltage V1. REF2 .

[0061] Specifically, the hysteresis comparator 111 can be used to determine the first feedback voltage V. F1 With the second feedback voltage V F2 The difference between them outputs the first control signal S. 1C First control signal S 1C Includes a first signal S1 or a second signal S2, for example, the first signal S1 is high and the second signal S2 is low; optionally, the hysteresis comparator 111 is used to adjust the first feedback voltage V. F1 With the second feedback voltage V F2 When the difference between them is within a preset difference range, the first signal S1 is output; or, the hysteresis comparator 111 is used to output the first feedback voltage V F1 With the second feedback voltage V F2 When the difference between the two exceeds the preset difference range, a second signal S2 is output. The voltage setting circuit 112 can be used with the first control signal S... 1C When the first signal S1 is used, the signal S is set according to the voltage.SET Set the first reference voltage V REF1 Or, in the first control signal S 1C When the first signal S1 changes to the second signal S2, the first reference voltage V is latched. REF1 That is, in the first control signal S 1C When the second signal S2 is used, the current first reference voltage V is maintained. REF1 Unchanged. The conversion circuit 113 is used to convert the first reference voltage V... REF1 The voltage is converted to a first supply voltage V1. The analog operation circuit 114 can be used to convert the voltage to a first reference voltage V1. REF1 Output second reference voltage V REF2 That is, the second reference voltage V REF2 It can follow the first reference voltage V REF1 It changes with the changes.

[0062] It should be noted that the aforementioned preset difference range can be the voltage difference constraint range corresponding to the difference between the first supply voltage V1 and the second supply voltage V2, or a range within the voltage difference constraint range. The preset difference range can be set in advance. For example, the preset difference range can be [-200mV, 400mV]. This application embodiment does not impose specific limitations on this.

[0063] Optionally, the aforementioned conversion circuit 113 may include a DC-DC conversion circuit. A typical implementation of the DC-DC conversion circuit is a buck circuit, or it may be a boost circuit, or a buck-boost circuit. This embodiment is not limited to this. For example, a buck circuit is used as an example... Figure 6 As shown, the conversion circuit 113 may include a bias feedback module and a power transistor adjustment module. The bias feedback module may include an error amplifier EA. Specifically, the first supply voltage V1 and the first reference voltage V... REF1 After the error amplifier EA outputs a deviation signal, this signal is transmitted to the power transistor adjustment module. The power transistor adjustment module adjusts the first supply voltage V1 by changing the switch duty cycle and on-resistance, ultimately achieving a zero output from the error amplifier EA, meaning the first supply voltage V1 reaches the first reference voltage V. REF1 The entire loop described above forms a negative feedback mechanism, where the first supply voltage V1 at the steady-state operating point depends entirely on the first reference voltage V. REF1 The setting is such that if you want to change the first supply voltage V1, you only need to change the first reference voltage V. REF1 That's all.

[0064] For example, such as Figure 6As shown, the power transistor regulation module may include a comparator CMP1, a pulse width modulator (PWM), a first transistor M1, a second transistor M2, and an inductor L. VIN represents the input voltage terminal, GND represents the ground terminal, and C represents the load capacitance. Specifically, the error amplifier EA amplifies the first reference voltage V by comparison. REF1 The first supply voltage V1 is used to output a deviation signal. The comparator CMP1 compares the deviation signal with the fixed triangular wave frequency signal Vramp and outputs a PWM signal with the same frequency as Vramp and a variable duty cycle. The PWM signal passes through the pulse width modulator (PWM) module. The PWM module controls the first transistor M1 and the second transistor M2 to turn on alternately to change the switching duty cycle and on-resistance, etc.

[0065] In another possible embodiment, such as Figure 7 As shown above, Figure 5 The connection of the input terminal of the analog operation circuit 114 in the first power supply circuit 11 shown can be replaced by coupling it to the output terminal of the conversion circuit 113, that is, the input terminal of the analog operation circuit 114 can be used to receive the first supply voltage V1 output by the conversion circuit 113. In this case, the analog operation circuit 114 can be used to output a second reference voltage V based on the first supply voltage V1. REF2 That is, the second reference voltage V REF2 It can change in accordance with the changes in the first supply voltage V1.

[0066] In the two possible implementations described above, the first reference voltage V REF1 Or the first feedback voltage V REF1 With the second reference voltage V REF2 The two voltages can exhibit a positive correlation within a certain voltage regulation phase, i.e., the second reference voltage V... REF2 With the first reference voltage V REF1 Or the first feedback voltage V F1 It rises with the increase of the first reference voltage V. REF1 Or the first feedback voltage V F1 The voltage decreases as the reference voltage V decreases. Optionally, the first reference voltage V... REF1 With the second reference voltage V REF2 The relationship between them can be linear; or, the first supply voltage V1 and the second reference voltage V... REF2 The relationship can be linear. The following uses the first reference voltage V as an example. REF1 With the second reference voltage V REF2 Let's take a linear relationship between them as an example.

[0067] Specifically, the first reference voltage V REF1 With the second reference voltage V REF2The following formula (I) is satisfied; where k and b can be real numbers. For example, k can be less than 0 and b can be greater than 0, thus the first reference voltage V... REF1 It can be greater than the second reference voltage V. REF2 Therefore, the first supply voltage V1 can be greater than the second supply voltage V2.

[0068] V REF2 =k×V REF1 +b(I)

[0069] Furthermore, such as Figure 8 As shown in (a), the analog operational circuit 114 may include: an operational amplifier Am, a first resistor R1, a second resistor R2, a third resistor R3, and a variable resistor Rx. One end of the first resistor R1 is coupled to the negative input terminal of the operational amplifier Am; one end of the second resistor R2 is coupled to the positive input terminal of the operational amplifier Am; the third resistor R3 is coupled between the negative input terminal and the output terminal of the operational amplifier Am; and the variable resistor Rx is coupled between the positive input terminal and the ground terminal GND of the operational amplifier Am. The other end of the first resistor R1 is used to receive a first reference voltage V. REF1 Or the first feedback voltage V F1 The other end of the second resistor R2 is used to receive the bias voltage V. offset The output of operational amplifier Am is used to output the second reference voltage V. REF2 At this time, the first reference voltage V REF1 Or the first feedback voltage V F1 With the second reference voltage V REF2 The relationship between them can be linear. For example, if the initial value of the first supply voltage V1 is 0.5V and the required voltage is 1.1V, and the constraint condition for the first supply voltage V1 and the second supply voltage V2 is that V1-V2 belongs to [-200mV, 400mV], then during the voltage regulation process, the relationship between the first supply voltage V1 and the second supply voltage V2 can be as follows: Figure 8 As shown in (b), T represents time. During the process of the first supply voltage V1 rising from 0.5V to 1.1V, the second supply voltage V2 can rise from 0.7V to 0.9V.

[0070] Specifically, when the other end of the first resistor R1 in the analog operation circuit 114 is used to receive the first reference voltage V REF1 At that time, the second reference voltage V REF2 It can be determined by the following formula (II). When the first reference voltage V REF1 With the second reference voltage V REF2When the relationship between k and b is linear as shown in formula (I), the specific values ​​of k and b can be expressed as in formula (III). In practical applications, different values ​​of k and b can be obtained by setting different resistance values.

[0071]

[0072] It should be noted that when the other end of the first resistor R1 in the analog operation circuit 114 is used to receive the first feedback voltage V F1 At that time, the second reference voltage V REF2 The specific values ​​of k and b can also be determined using formulas similar to those described above, the only difference being the substitution of V in formulas (II) and (III). REF1 Replace with V F1 .

[0073] Or, such as Figure 9 As shown, the analog operation circuit 114 may include a comparator CMP and a multiplexer MUX. The multiplexer MUX can also be called a multiplexed analog selector or a multiplexed analog switch; this embodiment does not impose specific limitations on this. When the input terminal of the analog operation circuit 114 is coupled to the second output terminal of the voltage setting circuit, the comparator CMP can be used to compare the preset voltage V. CMP With the first reference voltage V REF1 To output the second control signal S 2C Second control signal S 2C This includes a third signal S3 or a fourth signal S4; for example, the third signal S3 is high and the fourth signal S4 is low. For instance, a comparator CMP is used to compare a preset voltage V. CMP With the first reference voltage V REF1 For example, when the preset voltage V CMP Less than or equal to the first reference voltage V REF1 When the comparator CMP can be used to output a high level (i.e., the third signal S3), and the preset voltage V... CMP Greater than the first reference voltage V REF1 At this time, the comparator CMP can be used to output a low level (i.e., the fourth signal S4).

[0074] Additionally, a multiplexer (MUX) can be used in the second control signal S. 2C When the third signal is S3, the first reference voltage V is selected. REF1 With bias voltage V offset The difference is the second reference voltage V. REF2 Or in the second control signal S 2C When the fourth signal S4 is selected, a fixed voltage V0 is chosen as the second reference voltage V. REF2 Here, the first reference voltage V is selected.REF1 With bias voltage V offset The difference can be achieved using a subtractor, which can be integrated inside the multiplexer (MUX) or, as shown in other examples... Figure 9 The setting shown is independent and located outside the multiplexer (MUX). Figure 9 The bias voltage V in offset and Figure 8 The bias voltage V in offset These are different bias voltages. At this time, at the preset voltage V... CMP Less than or equal to the first reference voltage V REF1 During this phase, the first reference voltage V REF1 With the second reference voltage V REF2 The relationship between them is linear.

[0075] Specifically, at the preset voltage V CMP Less than or equal to the first reference voltage V REF1 When this occurs, the comparator CMP can output a high level, allowing the multiplexer MUX to select the second reference voltage V based on this high level. REF2 For V REF1 -V offset ; at the preset voltage V CMP Greater than the first reference voltage V REF1 When this occurs, the comparator CMP can output a low level, allowing the multiplexer MUX to select the second reference voltage V based on this low level. REF2 The voltage is fixed at V0. The subsequent second power supply circuit 12 operates using this second reference voltage V0. REF The output second supply voltage V2 can always be at the lowest value within the required range, thereby maximizing power saving; simultaneously, in the second control signal S 2C When the fourth signal S4 is active (i.e., the first supply voltage V1 is relatively small), the second reference voltage V is controlled. REF2 By using a fixed voltage V0, it is also possible to ensure that the second power supply voltage V2 meets the minimum power supply requirements.

[0076] For example, assuming V0 = 0.7V, the initial value of the first supply voltage V1 is 0.5V, the required voltage is 1.1V, and the constraint condition for the first supply voltage V1 and the second supply voltage V2 is that V1-V2 belongs to [-200mV, 400mV], then during the voltage regulation process, the relationship between the first supply voltage V1 and the second supply voltage V2 can be as follows: Figure 10As shown, T represents time. During the process of the first supply voltage V1 rising from 0.5V to 1.1V, the voltage regulation process of the second supply voltage V2 can be divided into two stages. In the first stage, the second supply voltage V2 is equal to 0.7V. In the second stage, the second supply voltage V2 gradually rises and always stays at the lowest value (e.g., 0.9V) within the voltage difference constraint range.

[0077] It should be noted that the connection relationship of the input terminal of the analog operation circuit 114 can also be replaced by coupling with the output terminal of the conversion circuit 113; correspondingly, the comparator CMP and the multiplexer MUX in the analog operation circuit 114 can also achieve similar functions based on the first power supply voltage V1 output by the conversion circuit 113, which will not be described in detail here.

[0078] Furthermore, the specific structure of the aforementioned analog operation circuit 114 can be replaced with other circuits that have similar functions. Figure 8 and Figure 9 These are merely illustrative examples and do not constitute a limitation on the embodiments described in this application.

[0079] Furthermore, such as Figure 11 As shown, the voltage setting circuit 112 may include: a voltage parameter configuration circuit 1121, a digital ramp adjustment circuit 1122, and a digital-to-analog converter (DAC) 1123. The voltage parameter configuration circuit 1121 and the digital ramp adjustment circuit 1122 can be collectively referred to as the digital voltage generation circuit.

[0080] Among them, the voltage parameter configuration circuit 1121 is used to store the voltage setting signal S SET For example, it is used to store the required voltage value and the voltage regulation rate. The digital step-up regulation circuit 1122 is used in the first control signal S 1C When the first signal S1 is given, the value of the required voltage, the voltage regulation rate, and the clock signal S are used. CLK The digital voltage is generated; that is, the first signal S1 can be used to enable the digital step-up adjustment circuit 1122 to operate normally. For example, the digital step-up adjustment circuit 1122 is used to provide voltage codes (i.e., digital voltages) corresponding to different voltages in a gradually increasing or decreasing order according to the voltage regulation rate. For instance, if the initial value of the first supply voltage V1 is 1V, the required voltage is 5V, and the voltage regulation rate is 0.5V / s (seconds), then the digital step-up adjustment circuit 1122 can be used to provide voltage codes corresponding to 1.5V, 2V, 2.5V, ..., 5V in a gradually increasing order. Alternatively, the digital step-up adjustment circuit 1122 can be used to provide voltage codes corresponding to 1.5V, 2V, 2.5V, ..., 5V in a gradually increasing order according to the first control signal S1. 1CWhen the signal changes from the first signal S1 to the second signal S2, the previous digital voltage is latched. That is, the second signal S2 can be used to maintain the digital voltage output by the digital step-up adjustment circuit 1122 at the previous value. The digital-to-analog converter 1123 is used to convert this digital voltage into an analog voltage, which is the first reference voltage V. REF1 .

[0081] Furthermore, the second power supply circuit 12 in the circuit adjustment circuit 1 may include a conversion circuit. The specific structure of this conversion circuit may be similar to that of the conversion circuit 113 in the first power supply circuit 11, and is specifically used to convert the second reference voltage V REF2 The voltage is converted to a second supply voltage V2, which will not be described in detail in the embodiments of this application.

[0082] In this embodiment, during the adjustment of the first supply voltage V1 and the second supply voltage V2 by the voltage adjustment circuit 1, if the difference between the first supply voltage V1 and the second supply voltage V2 exceeds or is about to exceed the voltage difference constraint range, the previous digital voltage can be latched by the digital leap adjustment circuit 1122 in the voltage setting circuit 112. That is, the adjustment of the first supply voltage V1 is paused, and the adjustment of the first supply voltage V1 is resumed after the second supply voltage V2 is adjusted to the appropriate level. This achieves the linkage adjustment of the first supply voltage V1 and the second supply voltage V2, ensuring that the difference between the first supply voltage V1 and the second supply voltage V2 is within the voltage difference constraint range, thereby ensuring the continuity of voltage adjustment, reducing voltage adjustment time, and improving processor performance and user experience.

[0083] Based on this, such as Figure 12 As shown, this application embodiment also provides a chip system, which includes a system-on-a-chip (SoC) and a power supply chip for powering the SoC; wherein the power supply chip may include any of the voltage regulation circuits 1 provided above, and the SoC may include the processor 2 provided above.

[0084] This application embodiment also provides an electronic device, which includes a circuit board, the circuit board including a SoC and a power chip for powering the SoC; wherein the power chip may include any of the voltage regulation circuits 1 provided above, and the SoC may include the processor 2 provided above.

[0085] It should be noted that the descriptions of the voltage regulation circuit 1 and processor 2 provided above can be applied to the chip system or the electronic device, and will not be repeated here in the embodiments of this application.

[0086] Figure 13This is a flowchart illustrating a voltage regulation method provided in an embodiment of this application. This method can be applied to the voltage regulation circuit provided above, which is coupled to a processor. The method may include the following steps.

[0087] S200: The processor outputs a voltage setting signal, which includes the required voltage and the voltage regulation rate. The processor can be a System-on-a-Chip (SoC). The processor can output this voltage setting signal according to the load conditions; the voltage setting signal can include the required voltage and the voltage regulation rate. For example, under light load, the processor can output a smaller voltage setting signal to cause the voltage regulation circuit to reduce the supply voltage; under heavy load, the processor can output a larger voltage setting signal to cause the voltage regulation circuit to increase the supply voltage.

[0088] S201: Based on the voltage setting signal and the difference between the first feedback voltage and the second feedback voltage, output a first supply voltage and a second reference voltage. The first feedback voltage reflects the first supply voltage, and the second feedback voltage reflects the second supply voltage. A voltage difference constraint may exist between the first and second supply voltages. During the adjustment of the first and second supply voltages, the voltage regulation circuit needs to ensure that the difference between the first and second supply voltages is within a preset range. There is a correlation between the difference between the first and second feedback voltages and the difference between the first and second supply voltages. For example, if the difference between the first and second feedback voltages is within a preset range, it ensures that the difference between the first and second supply voltages is within a certain preset range, such as a voltage difference constraint range. Optionally, the first feedback voltage equals the first supply voltage, and the second feedback voltage equals the second supply voltage; therefore, the difference between the first and second feedback voltages is the difference between the first and second supply voltages.

[0089] Specifically, based on the voltage setting signal and the difference between the first feedback voltage and the second feedback voltage, outputting a first supply voltage and a second reference voltage includes: outputting a first control signal based on the difference between the first feedback voltage and the second feedback voltage, the first control signal including a first signal or a second signal, the first signal indicating that the difference between the first feedback voltage and the second feedback voltage is within a preset difference range, and the second signal indicating that the difference between the first feedback voltage and the second feedback voltage exceeds the preset difference range; setting the first reference voltage based on the voltage setting signal when the first control signal is the first signal, or latching the first reference voltage when the first control signal changes from the first signal to the second signal; converting the first reference voltage into a first supply voltage; and outputting the second reference voltage based on the first reference voltage or the first feedback voltage.

[0090] In another possible implementation, setting a first reference voltage according to a voltage setting signal when the first control signal is a first signal includes: generating a digital voltage according to a voltage setting signal when the first control signal is a first signal, or latching the digital voltage when the first control signal changes from a first signal to a second signal; and converting the digital voltage into an analog voltage to obtain the first reference voltage.

[0091] In another possible implementation, outputting a second reference voltage based on a first reference voltage or a first feedback voltage includes: comparing the first reference voltage with a preset voltage to output a second control signal, the second control signal including a third signal and a fourth signal; selecting the difference between the first reference voltage and the bias voltage as the second reference voltage when the second control signal is the third signal, or selecting a fixed voltage as the second reference voltage when the second control signal is the fourth signal.

[0092] S202: Convert the second reference voltage into a second supply voltage. The processor may include a memory circuit and logic circuitry for accessing the memory circuit. The first supply voltage may be used to power the logic circuitry, and the second supply voltage may be used to power the memory circuitry.

[0093] It should be noted that each module of the voltage regulation circuit provided above can be used to execute the corresponding steps in the voltage regulation method provided in the embodiments of this application. Since each module and specific process has been described in detail in the aforementioned embodiments of the voltage regulation circuit, it will not be repeated here.

[0094] During this voltage regulation process, the adjustment of the first supply voltage is constrained by the difference between the first feedback voltage and the second feedback voltage. The second reference voltage used to output the second supply voltage is generated by the first power supply circuit. Thus, the second supply voltage can change with the adjustment of the first supply voltage. The adjustment rate of the first supply voltage is constrained by the difference between the first feedback voltage and the second feedback voltage, ensuring that the difference between the first supply voltage and the second supply voltage is within the voltage difference constraint range. This ensures the continuity of voltage regulation, reduces voltage regulation time, and improves processor performance and user experience.

[0095] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A voltage regulating circuit, characterized by, The device comprises the circuit according to any one of claims 1-4, and a processor coupled with the voltage regulation circuit; wherein, the first power supply circuit is configured to receive a voltage setting signal, and output a first supply voltage and a second reference voltage according to the voltage setting signal and a difference between a first feedback voltage and a second feedback voltage, the first feedback voltage being used to reflect the first supply voltage, and the second feedback voltage being used to reflect a second supply voltage; the second power supply circuit is configured to convert the second reference voltage into the second supply voltage, the first supply voltage and the second supply voltage being used to supply power to the processor simultaneously; the first power supply circuit comprises: a hysteresis comparator configured to compare the first feedback voltage and the second feedback voltage and output a first control signal, the first control signal being a first signal or a second signal, the first signal being used to indicate that the difference is within a preset difference range, and the second signal being used to indicate that the difference is out of the preset difference range; a voltage setting circuit configured to set a first reference voltage according to the voltage setting signal when the first control signal is the first signal, or latch the first reference voltage when the first control signal changes from the first signal to the second signal; a conversion circuit configured to convert the first reference voltage into the first supply voltage; an analog operation circuit configured to output a second reference voltage according to the first reference voltage or the first feedback voltage.

2. The circuit of claim 1, wherein, The voltage setting circuit comprises: a digital voltage generation circuit configured to generate a digital voltage according to the voltage setting signal when the first control signal is the first signal, or latch the digital voltage when the first control signal changes from the first signal to the second signal; a digital-to-analog converter configured to convert the digital voltage into an analog voltage to obtain the first reference voltage.

3. The circuit of claim 1 or 2, characterized in that, The analog operation circuit comprises a comparator and a multiplexer; the comparator is configured to compare the first reference voltage and a preset voltage to output a second control signal, the second control signal comprising a third signal or a fourth signal; the multiplexer is configured to select a difference between the first reference voltage and a bias voltage as the second reference voltage when the second control signal is the third signal, or select a fixed voltage as the second reference voltage when the second control signal is the fourth signal.

4. The circuit of claim 1 or 2, wherein The analog operation circuit comprises an operational amplifier, a first resistor, a second resistor, a third resistor, and a variable resistor; one end of the first resistor is coupled with a negative phase input end of the operational amplifier, one end of the second resistor is coupled with a positive phase input end of the operational amplifier, the third resistor is coupled between the negative phase input end of the operational amplifier and an output end of the operational amplifier, and the variable resistor is coupled between the positive phase input end of the operational amplifier and a ground end; the other end of the first resistor is configured to receive the first reference voltage, the other end of the second resistor is configured to receive a bias voltage, and the output end of the operational amplifier is configured to output the second reference voltage.

5. A voltage regulating device, characterized by The device comprises the circuit according to any one of claims 1-4, and a processor coupled with the voltage regulation circuit; wherein, The processor is configured to generate the voltage setting signal.

6. The apparatus of claim 5, wherein, The processor comprises a storage circuit and a logic circuit, the first supply voltage is used to supply power to the logic circuit, and the second supply voltage is used to supply power to the storage circuit.

7. The apparatus of claim 5 or 6, wherein, The processor is a system on chip (SoC).

8. A chip system, characterized by The chip system comprises a system on chip (SoC) and a power supply chip for supplying power to the SoC, and the power supply chip comprises the voltage regulation circuit according to any one of claims 1-4.

9. An electronic device, comprising: The electronic device comprises a circuit board, and the circuit board comprises a system on chip (SoC) and a power supply chip for supplying power to the SoC, and the power supply chip comprises the voltage regulation circuit according to any one of claims 1-4.

10. A voltage regulation method, characterized by, The voltage regulation circuit comprises: receiving a voltage setting signal and outputting a first supply voltage and a second reference voltage according to the voltage setting signal and a difference between a first feedback voltage and a second feedback voltage, the first feedback voltage being used to reflect the first supply voltage, and the second feedback voltage being used to reflect a second supply voltage; transforming the second reference voltage into the second supply voltage, the first supply voltage and the second supply voltage being used to supply power to a processor at the same time; wherein outputting the first supply voltage and the second reference voltage according to the voltage setting signal and the difference between the first feedback voltage and the second feedback voltage comprises: comparing the first feedback voltage and the second feedback voltage and outputting a first control signal, the first control signal being a first signal or a second signal, the first signal being used to indicate that the difference is within a preset difference range, and the second signal being used to indicate that the difference is out of the preset difference range; setting a first reference voltage according to the voltage setting signal when the first control signal is the first signal, or latching the first reference voltage when the first control signal changes from the first signal to the second signal; transforming the first reference voltage into the first supply voltage; and outputting a second reference voltage according to the first reference voltage or the first feedback voltage. The processor is configured to generate the voltage setting signal. The processor comprises a storage circuit and a logic circuit, the first supply voltage is used to supply power to the logic circuit, and the second supply voltage is used to supply power to the storage circuit. The processor is a system on chip (SoC). The chip system comprises a system on chip (SoC) and a power supply chip for supplying power to the SoC, and the power supply chip comprises the voltage regulation circuit according to any one of claims 1-4. The electronic device comprises a circuit board, and the circuit board comprises a system on chip (SoC) and a power supply chip for supplying power to the SoC, and the power supply chip comprises the voltage regulation circuit according to any one of claims 1-4. The voltage regulation circuit comprises: receiving a voltage setting signal and outputting a first supply voltage and a second reference voltage according to the voltage setting signal and a difference between a first feedback voltage and a second feedback voltage, the first feedback voltage being used to reflect the first supply voltage, and the second feedback voltage being used to reflect a second supply voltage; transforming the second reference voltage into the second supply voltage, the first supply voltage and the second supply voltage being used to supply power to a processor at the same time; wherein outputting the first supply voltage and the second reference voltage according to the voltage setting signal and the difference between the first feedback voltage and the second feedback voltage comprises: comparing the first feedback voltage and the second feedback voltage and outputting a first control signal, the first control signal being a first signal or a second signal, the first signal being used to indicate that the difference is within a preset difference range, and the second signal being used to indicate that the difference is out of the preset difference range; setting a first reference voltage according to the voltage setting signal when the first control signal is the first signal, or latching the first reference voltage when the first control signal changes from the first signal to the second signal; transforming the first reference voltage into the first supply voltage; and outputting a second reference voltage according to the first reference voltage or the first feedback voltage.

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