Linear voltage regulator and power supply system
By introducing a storage module and an information reading module into a linear voltage regulator, combining two power-on modes, the complex and cost-effective circuit problems in the prior art are solved, and a simple and low-cost dual voltage output is achieved.
Patent Information
- Application Number
- CN202510633655.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-07-22
AI Technical Summary
The existing linear regulator solution is complex in circuit design and high in hardware costs when achieving two voltage requirements.
By introducing a storage module, an information reading module and an output voltage module into a linear regulator, combining two power-on modes (T1 and T2), it realizes that the first output voltage is output when information reading is successful and the second output voltage is output when failure, and there is no need to add pin definitions or control logic circuits.
It realizes a simple circuit design and low-cost dual voltage output to meet different voltage requirements.
Smart Images
Figure CN120353290A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of power supplies, and particularly to a linear regulator and a power supply system. Background Art
[0002] A linear regulator is a circuit design based on a zener diode and a transistor, which is used to convert an input voltage higher than the required value into a fixed output voltage. The linear regulator has a smaller output ripple, lower noise of the output voltage, and a simple circuit structure at the same time.
[0003] With the development of electronic technology, in some application scenarios of electronic devices, there may be two voltage requirements. The existing solution is to set two linear regulators that can provide different output voltages, and switch between these two linear regulators to meet this requirement. However, the existing solution has a complex circuit design and a high hardware cost. Summary of the Invention
[0004] To solve the problems in the related art, embodiments of the present disclosure provide a linear regulator and a power supply system.
[0005] In a first aspect, an embodiment of the present disclosure provides a linear regulator, including:
[0006] A storage module for storing information. When the operating voltage of the storage module is greater than or equal to V0, the information stored in the storage module can be successfully read;
[0007] An information reading module connected to the storage module, configured to read the information stored in the storage module when the power-on duration of the linear regulator reaches T0. The linear regulator has two power-on modes. The total power-on duration of one power-on mode is T1, and the total power-on duration of the other power-on mode is T2. If the total power-on duration of the linear regulator is T1, when the power-on duration of the linear regulator reaches T0, the operating voltage V_T1 of the storage module is greater than or equal to V0, and the information reading module successfully reads the information stored in the storage module. If the total power-on duration of the linear regulator during power-on is T2, when the power-on duration of the linear regulator reaches T0, the operating voltage V_T2 of the storage module is less than V0, and the information reading module fails to read the information stored in the storage module, where T0 < T1 < T2;
[0008] An output voltage module connected to the information reading module, configured to output a first output voltage when the information reading module successfully reads the information stored in the storage module, and output a second output voltage when the information reading module fails to read the information stored in the storage module, where the first output voltage and the second output voltage are different.
[0009] In a possible implementation, T1 ≤ (1 / 2)*T2.
[0010] In a possible implementation, the linear voltage regulator is powered by a first external power supply, and the first external power supply controllably provides two power-on modes with different power-on slopes for the linear voltage regulator.
[0011] In a possible implementation, the linear voltage regulator is powered by a second external power supply, and the second external power supply provides a default power-on mode for the linear voltage regulator. The linear voltage regulator further includes:
[0012] A regulation module, configured to power on the linear voltage regulator according to the default power-on mode provided by the second external power supply for the linear voltage regulator when the power-on mode identifier is the default identifier; when the power-on mode identifier is the adjustment identifier, adjust the default power-on mode to a target power-on mode, and power on the linear voltage regulator according to the target power-on mode, where the target power-on mode is to adjust the default total power-on duration of the default power-on mode to a target total power-on duration.
[0013] In a possible implementation, the information stored in the storage module includes output voltage identification information, and the voltage value of the first output voltage is the voltage value indicated by the output voltage identification information.
[0014] In a possible implementation, the voltage value of the second output voltage is a default value.
[0015] In a possible implementation, the accuracy of the default value is less than the accuracy of the voltage value indicated by the output voltage identification information.
[0016] In a possible implementation, the storage module includes an electronic fuse EFUSE, and the information reading module includes a latch.
[0017] In a second aspect, an embodiment of the present disclosure provides a power supply system, including an external power supply and the linear voltage regulator described in the first aspect;
[0018] The external power supply is connected to the linear voltage regulator and is configured to power on the linear voltage regulator.
[0019] In a possible implementation, the external power supply is a first external power supply, and the first external power supply controllably provides two power-on modes with different power-on slopes for the linear voltage regulator.
[0020] In a possible implementation, the external power supply is a second external power supply, and the second external power supply provides a default power-on mode for the linear voltage regulator;
[0021] The linear voltage regulator further includes:
[0022] A regulation module, configured to power on the linear voltage regulator according to a default power-on mode provided by the second external power supply for the linear voltage regulator when a power-on mode identifier is the default identifier; and when the power-on mode identifier is an adjustment identifier, adjust the default power-on mode to a target power-on mode, and power on the linear voltage regulator according to the target power-on mode, where the target power-on mode is to adjust a default total power-on duration of the default power-on mode to a target total power-on duration.
[0023] According to the technical solution provided by the embodiments of the present disclosure, two power-on modes with different total power-on durations can be provided for a linear voltage regulator. If a total power-on duration of the linear voltage regulator is T1, a working voltage V_T1 of a storage module is greater than or equal to V0 when an on-time of the linear voltage regulator reaches T0. At this time, the information reading module can successfully read information stored in the storage module. If a total power-on duration during power-on of the linear voltage regulator is T2, the working voltage V_T2 of the storage module is less than V0 when the on-time of the linear voltage regulator reaches T0. At this time, the information reading module fails to read the information stored in the storage module. An output voltage module can output a first output voltage when the information reading module successfully reads the information stored in the storage module, and output a second output voltage when the information reading module fails to read the information stored in the storage module. In this way, by controlling a power-on mode during power-on of the linear voltage regulator, two different output voltages can be provided by one linear voltage regulator, without changing pin definitions, without increasing the number of pins, and without adding a control logic circuit, thus realizing the output of dual voltages, with a simple design and low cost.
[0024] It should be understood that the above general description and subsequent detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In combination with the drawings, through the following detailed description of non-limiting embodiments, other features, objects, and advantages of the present disclosure will become more apparent. In the drawings:
[0026] Figure 1 A structural block diagram of a linear voltage regulator provided by an embodiment of the present disclosure is shown.
[0027] Figure 2 A schematic diagram of a power-on process with two power-on slopes provided by an embodiment of the present disclosure is shown.
[0028] Figure 3 A structural block diagram of another linear voltage regulator provided by an embodiment of the present disclosure is shown.
[0029] Figure 4The block diagram of a power supply system provided by an embodiment of the present disclosure is shown. Detailed implementation manners
[0030] In the following, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. In addition, for clarity, parts irrelevant to the description of the exemplary embodiments are omitted in the drawings.
[0031] In the present disclosure, it should be understood that terms such as "including" or "having" are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof disclosed in this specification, and are not intended to exclude the possibility of the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.
[0032] In addition, it should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0033] Figure 1 The block diagram of a linear voltage regulator provided by an embodiment of the present disclosure is shown. As Figure 1 shown, the linear voltage regulator includes a storage module 101, an information reading module 102, and an output voltage module 103.
[0034] In a possible implementation manner, the storage module 101 is used to store information and can be a non-volatile storage device. The operating voltage for successfully reading the information stored in the storage module 101 is V0, that is, when the operating voltage of the storage module 101 is greater than or equal to V0, the information stored in the storage module 101 can be successfully read.
[0035] In a possible implementation manner, the linear voltage regulator can be powered by an external power supply, and the external power supply can power on the linear voltage regulator with a stable power-on slope. In this way, the linear voltage regulator can start power-on from 0V and gradually power on to VIN at a fixed power-on slope. The VIN is the input voltage of the linear voltage regulator. When the voltage input to the linear voltage regulator by the external power supply reaches VIN, the power-on ends. The time difference between the start power-on moment and the end power-on moment is the total power-on duration when the linear voltage regulator is powered on. The input voltage of the linear voltage regulator is a fixed VIN. Therefore, when different power-on slopes are used for power-on, the total power-on duration when the linear voltage regulator is powered on will also be different, and it can be expressed by the following formula: T = VIN / k, where k is the power-on slope and T is the total power-on duration. The total power-on duration T will decrease as the power-on slope increases.
[0036] In a possible implementation manner, Figure 2The figure shows a schematic diagram of the power-on process with two power-on slopes provided by an embodiment of the present disclosure. As Figure 2 shown, the input voltage of the linear regulator is VIN. The external power supply can be controlled to power on the linear regulator with two different power-on slopes k1 and k2. In this way, two power-on modes can be provided for the linear regulator. The total power-on duration of one power-on mode is T1 = VIN / k1, and the total power-on duration of the other power-on mode is T2 = VIN / k2, where T1 < T2.
[0037] In a possible implementation manner, the information reading module 102 is connected to the storage module 101 and is configured to read the information stored in the storage module 101 when the power-on duration of the linear regulator reaches T0. As Figure 2 shown, if the total power-on duration of the linear regulator during power-on is T1, then the voltage V_T1 = k1*T0 when the power-on duration of the linear regulator reaches T0 is greater than or equal to V0. At this time, the operating voltage of the storage module 101 is V_T1 > V0, and the information stored in the storage module 101 can be successfully read. The information reading module 102 can successfully read the information stored in the storage module 101. If the total power-on duration of the linear regulator during power-on is T2, then the voltage V_T2 = k2*T0 when the power-on duration of the linear regulator reaches T0 is less than V0. At this time, the operating voltage of the storage module 101 is V_T2 < V0, and the information stored in the storage module 101 cannot be successfully read. The information reading module 102 fails to read the information stored in the storage module 101.
[0038] In a possible implementation manner, T0, T1, and T2 can be determined according to V_T2 (V_T2 = (VIN / T2)*T0) < V0 ≤ V_T1 (V_T1 = (VIN / T1)*T0). In this way, if the total power-on duration of the linear regulator during power-on is T1, then the voltage V_T1 when the power-on duration of the linear regulator reaches T0 is greater than or equal to V0, and the information reading module 102 can successfully read the information stored in the storage module 101. If the total power-on duration of the linear regulator during power-on is T2, then the voltage V_T2 when the power-on duration of the linear regulator reaches T0 is less than V0, and the information reading module 102 fails to read the information stored in the storage module 101.
[0039] In a possible implementation, the output voltage module 103 is connected to the information reading module 102. When the information reading module 102 successfully reads the information stored in the storage module 101, it outputs a first output voltage. When the information reading module 102 fails to read the information stored in the storage module 101, it outputs a second output voltage, and the first output voltage and the second output voltage are different. For example, when the information reading module 102 successfully reads the information stored in the storage module 101, it can send a reading success notification to the output voltage module 103. At this time, the output voltage module 103 can output a predetermined first output voltage. When the information reading module 102 fails to read the information stored in the storage module 101, it can send a reading failure notification to the output voltage module 103. At this time, the output voltage module 103 can output a predetermined second output voltage.
[0040] This implementation can provide two power-on modes with different total power-on durations for the linear voltage regulator. If the total power-on duration of the linear voltage regulator is T1, when the power-on duration of the linear voltage regulator reaches T0, the operating voltage V_T1 of the storage module 101 is greater than or equal to V0. At this time, the information reading module 102 can successfully read the information stored in the storage module 101. If the total power-on duration of the linear voltage regulator during power-on is T2, when the power-on duration of the linear voltage regulator reaches T0, the operating voltage V_T2 of the storage module 101 is less than V0. At this time, the information reading module 102 fails to read the information stored in the storage module 101. The output voltage module 103 can output a first output voltage when the information reading module 102 successfully reads the information stored in the storage module 101, and output a second output voltage when the information reading module 102 fails to read the information stored in the storage module 101. In this way, by controlling the power-on mode of the linear voltage regulator during power-on, a linear voltage regulator can provide two different output voltages without changing the pin definition, without increasing the number of pins, and without increasing the control logic circuit, thus realizing the output of dual voltages, with simple design and low cost.
[0041] In a possible implementation, the relationship between T1 and T2 can be T1 ≤ (1 / 2) * T2. In this way, the gap between T1 and T2 is relatively large, and the difference between V_T1 = (VIN / T1) * T0 and V_T2 = (VIN / T2) * T0 is also relatively large. If V0 is taken in the middle region between V_T1 and V_T2, when comparing the magnitudes of V_T1, V_T2, and V0, even if there are fluctuations in V_T1 and V_T2 due to system errors, since the difference between V0 and V_T1, V_T2 is relatively large, this system error will not affect the comparison result, ensuring the accurate output of the first output voltage and the second output voltage of the linear voltage regulator.
[0042] In a possible implementation, the linear voltage regulator is powered by a first external power supply, and the first external power supply controllably provides two power-on modes with different power-on slopes for the linear voltage regulator.
[0043] In this implementation, generally, the external power supply can controllably provide two power-on modes with different power-on slopes. For example, Figure 2 as shown, when the first external power supply provides the first power-on mode with a power-on slope of k1 for the linear voltage regulator, the total power-on duration is T1; when the first external power supply provides the second power-on mode with a power-on slope of k2 for the linear voltage regulator, the total power-on duration is T2.
[0044] In this implementation, a timing control module can be set in the first external power supply to control the first external power supply to provide the corresponding power-on mode for the linear voltage regulator at the corresponding moment. For example, according to needs, at the first moment, the first external power supply can be controlled to provide the first power-on mode with a power-on slope of k1 for the linear voltage regulator, so that the linear voltage regulator outputs a first output voltage; at the second moment, the first external power supply can be controlled to provide the first power-on mode with a power-on slope of k2 for the linear voltage regulator, so that the linear voltage regulator outputs a second output voltage. The first moment and the second moment can be set in advance according to the power supply needs, or can be determined in real time according to the power supply needs. At this time, a control module needs to be set to control the first external power supply to provide the corresponding power-on mode for the linear voltage regulator at the corresponding moment in real time.
[0045] In a possible implementation, the linear voltage regulator is powered by a second external power supply, and the second external power supply provides a default power-on mode for the linear voltage regulator. As Figure 3 shown, the linear voltage regulator further includes:
[0046] A regulation module 104, configured to power on the linear voltage regulator according to the default power-on mode provided by the second external power supply when the power-on mode identifier is the default identifier; when the power-on mode identifier is the adjustment identifier, adjust the default power-on mode to a target power-on mode, and power on the linear voltage regulator according to the target power-on mode, where the target power-on mode is to adjust the default total power-on duration of the default power-on mode to a target total power-on duration.
[0047] In this embodiment, in some cases, the external power supply can only provide a default power-on mode. At this time, in order to implement the two power-on modes of the linear voltage regulator, a control module 104 can be set in the linear voltage regulator, and two power-on mode identifiers are set to control the control module 104 to switch the power-on mode. When the power-on mode identifier is the default identifier, such as 0, the linear voltage regulator can be powered on according to the default power-on mode provided by the second external power supply for the linear voltage regulator. When the power-on mode identifier is the adjustment identifier, such as 1, the default power-on mode is adjusted to the target power-on mode, and the linear voltage regulator is powered on according to the target power-on mode. The target power-on mode is to adjust the default total power-on duration of the default power-on mode to the target total power-on duration, and the control module 104 can delay the default total power-on duration of the default power-on mode to the target total power-on duration. When the default total power-on duration is T1, the target total power-on duration is T2.
[0048] In this embodiment, according to the power supply requirement, the power-on mode identifier in the control module 104 is the default identifier at the first moment, so that the linear voltage regulator outputs the first output voltage, and is the adjustment identifier at the second moment, so that the linear voltage regulator outputs the second output voltage. The first moment and the second moment can be moments preset according to the power supply requirement, or a control module can be set. The control module can change the power-on mode identifier in real time according to the power supply requirement. When the first output voltage is required, the power-on mode identifier in the control module 104 is controlled to be the default identifier, and when the second output voltage is required, the power-on mode identifier in the control module 104 is controlled to be the adjustment identifier.
[0049] In a possible implementation manner, the information stored in the storage module 101 includes output voltage identifier information, and the voltage value of the first output voltage is the voltage value indicated by the output voltage identifier information.
[0050] In this embodiment, the output voltage identifier information refers to the information for identifying the output voltage value of the linear voltage regulator. For example, when the output voltage identifier information is 1111, the output voltage value of the linear voltage regulator it identifies is 12V; when the output voltage identifier information is 1100, the output voltage value of the linear voltage regulator it identifies is 5V; when the output voltage identifier information is 1000, the output voltage value of the linear voltage regulator it identifies is 3.3V, and so on.
[0051] In this embodiment, when the information reading module 102 successfully reads the output voltage identification information stored in the storage module 101, it can send the read output voltage identification information to the output module, and the output voltage module 103 can output a first output voltage according to the output voltage value corresponding to the output voltage identification information. For example, the output voltage module 103 can output a voltage of 12V according to the output voltage value of 12V corresponding to the output voltage identification information 1111.
[0052] In practical applications, the output voltage identification information can be set according to the required output voltage.
[0053] In a possible implementation manner, the voltage value of the second output voltage is a default value. When the information reading module 102 fails to read the information stored in the storage module 101, it can send a notification of information reading failure to the output module. After receiving the information reading failure notification, the output voltage module 103 can output a second output voltage with a voltage value of the default value.
[0054] In a possible implementation manner, the accuracy of the default value is less than the accuracy of the voltage value indicated by the output voltage identification information. Here, the accuracy refers to the accuracy of the output voltage. In this way, the voltage value indicated by the output voltage identification information is of high precision, and the default value is of rough precision, which can reduce the storage space of the default value and relieve the storage pressure.
[0055] In a possible implementation manner, the storage module 101 includes an EFUSE, and the information reading module 102 includes a latch.
[0056] In this embodiment, the EFUSE (electronic fuse) module is a programmable electronic fuse and a non-volatile storage device for storing information and protecting the chip. The state of the output terminal of the latch does not change with the change of the state of the input terminal. Only when there is a latch signal, the state of the input is saved to the output until the next latch signal arrives; in this way, when there is a latch signal, the latch can read information from the EFUSE module and output the read information.
[0057] The present disclosure also provides a power supply system. Figure 4 The structural block diagram of a power supply system provided by an embodiment of the present disclosure is shown, as Figure 4 shown, the power supply system 40 includes an external power supply 41 and the above-mentioned linear voltage regulator 42.
[0058] The linear voltage regulator can be as Figure 1 shown, and includes a storage module 101, an information reading module 102, and an output voltage module 103.
[0059] In a possible implementation, the storage module 101 is used to store information and can be a non-volatile storage device. The operating voltage at which the information stored in the storage module 101 is successfully read is V0. That is, when the operating voltage of the storage module 101 is greater than or equal to V0, the information stored in the storage module 101 can be successfully read.
[0060] In a possible implementation, the linear regulator can be powered by an external power supply. After the external power supply is started, it can power on the linear regulator with a stable power-on slope. In this way, the linear regulator can start power-on from 0V and gradually power on to VIN at a fixed power-on slope. The VIN is the input voltage of the linear regulator. When the voltage input by the external power supply to the linear regulator reaches VIN, the power-on ends. The time difference between the start power-on moment and the power-on end moment is the total power-on duration when the linear regulator is powered on. The input voltage of the linear regulator is a fixed VIN. Therefore, when different power-on slopes are used for power-on, the total power-on duration when the linear regulator is powered on will also be different. It can be expressed by the following formula: T = VIN / k, where k is the power-on slope and T is the total power-on duration. The total power-on duration T will decrease as the power-on slope increases.
[0061] In a possible implementation, Figure 2 FIG. shows a schematic diagram of the power-on processes with two power-on slopes provided by an embodiment of the present disclosure. As Figure 2 shown, the input voltage of the linear regulator is VIN. The external power supply can be controlled to power on the linear regulator with two different power-on slopes k1 and k2. In this way, two power-on modes can be provided for the linear regulator. The total power-on duration of one power-on mode is T1 = VIN / k1, and the total power-on duration of the other power-on mode is T2 = VIN / k2, where T1 < T2.
[0062] In a possible implementation, the information reading module 102 is connected to the storage module 101 and is used to read the information stored in the storage module 101 when the power-on duration of the linear regulator reaches T0. As Figure 2As shown, when the total power-on duration of the linear voltage regulator is T1 when powered on, the voltage V_T1 = k1 * T0 when the power-on duration of the linear voltage regulator reaches T0 is greater than or equal to V0. At this time, the operating voltage of the storage module 101 is V_T1, and the information stored in the storage module 101 can be successfully read. The information reading module 102 can successfully read the information stored in the storage module 101. When the total power-on duration of the linear voltage regulator is T2 when powered on, the voltage V_T2 = k2 * T0 when the power-on duration of the linear voltage regulator reaches T0 is less than V0. At this time, the operating voltage of the storage module 101 is V_T2, and the information stored in the storage module 101 cannot be successfully read. The information reading module 102 fails to read the information stored in the storage module 101.
[0063] In a possible implementation manner, T0, T1, and T2 can be determined according to V_T2 (V_T2 = (VIN / T2) * T0) < V0 ≤ V_T1 (V_T1 = (VIN / T1) * T0). In this way, if the total power-on duration of the linear voltage regulator is T1 when powered on, the voltage V_T1 when the power-on duration of the linear voltage regulator reaches T0 is greater than or equal to V0, and the information reading module 102 can successfully read the information stored in the storage module 101. If the total power-on duration of the linear voltage regulator is T2 when powered on, the voltage V_T2 when the power-on duration of the linear voltage regulator reaches T0 is less than V0, and the information reading module 102 fails to read the information stored in the storage module 101.
[0064] In a possible implementation manner, the output voltage module 103 is connected to the information reading module 102 and is configured to output a first output voltage when the information reading module 102 successfully reads the information stored in the storage module 101, and output a second output voltage when the information reading module 102 fails to read the information stored in the storage module 101. The first output voltage and the second output voltage are different. For example, when the information reading module 102 successfully reads the information stored in the storage module 101, it can send a read success notification to the output voltage module 103. At this time, the output voltage module 103 can output a predetermined first output voltage. When the information reading module 102 fails to read the information stored in the storage module 101, it can send a read failure notification to the output voltage module 103. At this time, the output voltage module 103 can output a predetermined second output voltage.
[0065] This embodiment can provide two power - on modes with different total power - on durations for the linear voltage regulator. When the total power - on duration T of the linear voltage regulator is less than T1, if the total power - on duration of the linear voltage regulator is T1, then when the power - on duration of the linear voltage regulator reaches T0, the operating voltage V_T1 of the storage module 101 is greater than V0. At this time, the information reading module 102 can successfully read the information stored in the storage module 101; if the total power - on duration during the power - on of the linear voltage regulator is T2, then when the power - on duration of the linear voltage regulator reaches T0, the operating voltage V_T2 of the storage module 101 is less than V0. At this time, the information reading module 102 fails to read the information stored in the storage module 101; the output voltage module 103 can output a first output voltage when the information reading module 102 successfully reads the information stored in the storage module 101, and output a second output voltage when the information reading module 102 fails to read the information stored in the storage module 101; thus, by controlling the power - on mode during the power - on of the linear voltage regulator, a linear voltage regulator can provide two different output voltages. Without changing the pin definition, without increasing the number of pins, and without adding a control logic circuit, the output of dual voltages can be achieved, with simple design and low cost.
[0066] In a possible implementation manner, the external power supply is a first external power supply, and the first external power supply controllably provides two power - on modes with different power - on slopes for the linear voltage regulator.
[0067] In this implementation manner, usually the external power supply can controllably provide two power - on modes with different power - on slopes. For example, Figure 2 as shown, when the first external power supply provides the first power - on mode with a power - on slope of k1 for the linear voltage regulator, the total power - on duration is T1, and when the first external power supply provides the second power - on mode with a power - on slope of k2 for the linear voltage regulator, the total power - on duration is T2.
[0068] In this embodiment, a timing control module may be provided in the first external power supply to control the first external power supply to provide a corresponding power-on mode for the linear voltage regulator at corresponding times. For example, as needed, at a first time, the first external power supply is controlled to provide a first power-on mode with a power-on slope of k1 for the linear voltage regulator, so that the linear voltage regulator outputs a first output voltage. At a second time, the first external power supply is controlled to provide a first power-on mode with a power-on slope of k2 for the linear voltage regulator, so that the linear voltage regulator outputs a second output voltage. The first time and the second time may be preset according to the power supply requirement in advance. Alternatively, a control module may be provided, and the control module may change the power-on mode identifier in real time according to the power supply requirement. When the first output voltage is required, the power-on mode identifier in the control module 104 is controlled to be the default identifier. When the second output voltage is required, the power-on mode identifier in the control module 104 is controlled to be the adjusted identifier.
[0069] In a possible embodiment, the external power supply is a second external power supply, and the second external power supply provides a default power-on mode for the linear voltage regulator;
[0070] The linear voltage regulator further includes:
[0071] A control module, configured to power on the linear voltage regulator according to the default power-on mode provided by the second external power supply for the linear voltage regulator when the power-on mode identifier is the default identifier; when the power-on mode identifier is the adjusted identifier, adjust the default power-on mode to a target power-on mode, and power on the linear voltage regulator according to the target power-on mode, where the target power-on mode is to adjust the default total power-on duration of the default power-on mode to a target total power-on duration.
[0072] In this embodiment, in some cases, the external power supply can only provide a default power-on mode. At this time, in order to implement two power-on modes of the linear voltage regulator, a control module may be provided in the linear voltage regulator, and two power-on mode identifiers are set at the same time to control the control module to switch the power-on mode. When the power-on mode identifier is the default identifier, for example, 0, the linear voltage regulator may be powered on according to the default power-on mode provided by the second external power supply for the linear voltage regulator. When the power-on mode identifier is the adjusted identifier, for example, 1, the default power-on mode is adjusted to a target power-on mode, and the linear voltage regulator is powered on according to the target power-on mode. The target power-on mode is to adjust the default total power-on duration of the default power-on mode to a target total power-on duration. The control module may delay the default total power-on duration of the default power-on mode to the target total power-on duration. When the default total power-on duration is T1, the target total power-on duration is T2.
[0073] In this embodiment, according to the power supply requirement, the power-on mode identifier in the regulation module is the default identifier at the first moment, so that the linear voltage regulator outputs a first output voltage, and is the adjustment identifier at the second moment, so that the linear voltage regulator outputs a second output voltage. The first moment and the second moment can be moments preset in advance according to the power supply requirement, or alternatively, a control module can be set up. The control module can change the power-on mode identifier in real time according to the power supply requirement. When the first output voltage is required, it controls the power-on mode identifier in the regulation module 104 to be the default identifier, and when the second output voltage is required, it controls the power-on mode identifier in the regulation module 104 to be the adjustment identifier.
[0074] The above description is only a preferred embodiment of the present disclosure and an explanation of the applied technical principle. Those skilled in the art should understand that the scope of the invention involved in the present disclosure is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present disclosure.
Claims
1. A linear voltage regulator, characterized in that, Comprising: A storage module for storing information. When the operating voltage of the storage module is greater than or equal to V0, the information stored in the storage module can be successfully read. An information reading module connected to the storage module for reading the information stored in the storage module when the power-on duration of the linear regulator reaches T0. The linear regulator has two power-on modes. The total power-on duration of one power-on mode is T1, and the total power-on duration of the other power-on mode is T2. If the total power-on duration of the linear regulator is T1, the operating voltage V_T1 of the storage module when the power-on duration of the linear regulator reaches T0 is greater than or equal to V0, and the information reading module successfully reads the information stored in the storage module. If the total power-on duration of the linear regulator is T2, the operating voltage V_T2 of the storage module when the power-on duration of the linear regulator reaches T0 is less than V0, and the information reading module fails to read the information stored in the storage module, where T0 < T1 < T2. An output voltage module connected to the information reading module for outputting a first output voltage when the information reading module successfully reads the information stored in the storage module, and outputting a second output voltage when the information reading module fails to read the information stored in the storage module, where the first output voltage and the second output voltage are different.
2. The linear voltage regulator according to claim 1, wherein T1 ≤ (1 / 2)*T2.
3. The linear voltage regulator according to claim 1, wherein The linear regulator is powered by a first external power supply, and the first external power supply controllably provides two power-on modes with different power-on slopes for the linear regulator.
4. The linear voltage regulator according to claim 1, wherein The linear regulator is powered by a second external power supply, and the second external power supply provides a default power-on mode for the linear regulator. The linear regulator further includes: A regulation module for powering on the linear regulator according to the default power-on mode provided by the second external power supply for the linear regulator when the power-on mode identifier is the default identifier; and adjusting the default power-on mode to a target power-on mode and powering on the linear regulator according to the target power-on mode when the power-on mode identifier is the adjustment identifier, where the target power-on mode is to adjust the default total power-on duration of the default power-on mode to a target total power-on duration.
5. The linear voltage regulator according to claim 1, wherein The information stored in the storage module includes output voltage identification information, and the voltage value of the first output voltage is the voltage value indicated by the output voltage identification information.
6. The linear voltage regulator according to claim 5, characterized in that, The voltage value of the second output voltage is a default value.
7. The linear voltage regulator according to claim 6, characterized in that, The accuracy of the default value is less than the accuracy of the voltage value indicated by the output voltage identification information.
8. The linear voltage regulator according to claim 1, wherein The storage module includes an electronic fuse EFUSE, and the information reading module includes a latch.
9. A power supply system, characterized in that, Including an external power supply and the linear regulator according to claim 1; The external power supply is connected to the linear regulator for powering on the linear regulator.
10. The power supply system according to claim 9, wherein The external power supply is a first external power supply, and the first external power supply controllably provides two power-on modes with different power-on slopes for the linear regulator.
11. The power supply system according to claim 9, wherein The external power supply is a second external power supply, and the second external power supply provides a default power-on mode for the linear voltage regulator; The linear voltage regulator further includes: A regulation module, configured to power on the linear voltage regulator according to the default power-on mode provided by the second external power supply for the linear voltage regulator when the power-on mode identifier is the default identifier; when the power-on mode identifier is the adjustment identifier, adjust the default power-on mode to a target power-on mode, and power on the linear voltage regulator according to the target power-on mode, where the target power-on mode is to adjust the default total power-on duration of the default power-on mode to a target total power-on duration.