Device and method for enhancing transient response of driving enhanced LDO (low dropout regulator)

Abstract

The invention discloses a driving enhancement type LDO transient response enhancement device and method, and the device comprises a sampling feedback module which is used for monitoring the output voltage of an adjustment module in real time, carrying out the voltage division sampling of the output voltage, obtaining a feedback voltage, and outputting a feedback signal; the error amplification module is used for receiving the feedback signal, carrying out differential amplification on the feedback signal and a reference signal, and outputting a first driving signal; the driving enhancement module is used for receiving the first driving signal, amplifying and enhancing the first driving signal and outputting a second driving signal; and the adjusting module is used for receiving the second driving signal and adjusting the output voltage to supply power to the load under the control of the second driving signal. According to the invention, the driving enhancement module is introduced, so that significant beneficial effects are shown in the aspects of improving the transient response speed, enhancing the stability of output voltage, optimizing the power management efficiency, improving the precision of the output voltage and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of direct current power supply, and in particular to a device and method for enhancing transient response of a drive-enhanced LDO. Background Art

[0002] In modern electronic devices, the stability and efficiency of the power management system are crucial. As an important power management circuit, low dropout linear regulator (LDO) is widely used in various electronic devices due to its low voltage drop, high efficiency and stable output voltage, especially in situations where high power supply voltage accuracy and stability are required. LDO controls the adjustment tube through feedback signals to convert the input voltage into a controlled and relatively stable output voltage, thus meeting the high requirements of electronic devices for power quality.

[0003] However, due to the characteristics of the op amp circuit, the output signal of the LDO cannot always follow the rapid changes of the input signal, and it will also cause the amplifier to generate an offset voltage. Especially when light and heavy loads are switched quickly, the transient response capability of the LDO cannot keep up with the speed of change, resulting in a long voltage drop / overshoot time and a large amplitude, which directly affects the accuracy and stability of the power supply system, making the power supply voltage unable to reach its set value, thereby affecting the normal operation of the entire electronic device. Therefore, a solution is urgently needed to improve the transient response capability of the LDO. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a drive-enhanced LDO transient response enhancement device and method that can effectively solve the problem of LDO output voltage overshoot or undershoot without additionally consuming circuit bandwidth.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a drive-enhanced LDO transient response enhancement device, comprising:

[0006] The sampling feedback module is used to monitor the output voltage of the adjustment module in real time and perform voltage division sampling on it, obtain the feedback voltage, and output a feedback signal;

[0007] an error amplification module, configured to receive the feedback signal, differentially amplify the feedback signal and a reference signal, and output a first drive signal;

[0008] a driving enhancement module, configured to receive the first driving signal, amplify and enhance the first driving signal, and output a second driving signal; and

[0009] The adjustment module is used to receive the second driving signal and adjust the output voltage to supply power to the load under the control of the second driving signal.

[0010] Furthermore, the voltage signal input terminal of the adjustment module is connected to the input voltage, the voltage signal output terminal of the adjustment module is grounded through a load, the sampling signal input terminal of the sampling feedback module is electrically connected to the voltage signal output terminal of the adjustment module, the feedback signal output terminal of the sampling feedback module is electrically connected to the feedback signal input terminal of the error amplification module, the first drive signal output terminal of the error amplification module is electrically connected to the first drive signal input terminal of the drive enhancement module, and the second drive signal output terminal of the drive enhancement module is electrically connected to the second drive signal input terminal of the adjustment module.

[0011] Furthermore, the adjustment module includes a MOS tube Q and a gate parasitic capacitor C g The drain of the MOS tube Q is connected to the input voltage, the gate of the MOS tube Q is electrically connected to the second drive signal output end of the drive enhancement module as the second drive signal input end of the adjustment module, the source of the MOS tube Q is grounded through the load as the voltage signal output end of the adjustment module, and the gate parasitic capacitance C g One end of the gate of the MOS tube Q is electrically connected, and the gate parasitic capacitance C g The other end is grounded.

[0012] Furthermore, the load is defined as a load resistance R LOAD , the load resistance R LOAD One end of the load resistor R is electrically connected to the source of the MOS tube Q. LOAD The other end is grounded.

[0013] Furthermore, the sampling feedback module includes a first resistor R FB1 and the second resistor R FB2 The first resistor R FB1 The first end of the sampling feedback module is electrically connected to the source of the MOS tube Q as the sampling signal input end of the sampling feedback module, and the first resistor R FB1 The second end is connected through the second resistor R FB2 grounded, the first resistor R FB1 The second end of is used as the feedback signal output end of the sampling feedback module and is electrically connected to the feedback signal input end of the error amplification module.

[0014] Furthermore, the error amplification module includes a reference voltage source V REF , error amplifier EA and first parasitic capacitor C EA The in-phase input terminal of the error amplifier EA is used as the feedback signal input terminal of the error amplifier module and the first resistor R FB1 The second end is electrically connected to the inverting input terminal of the error amplifier EA and the reference voltage source VREF The positive electrode of the error amplifier EA is electrically connected to the reference signal, and the output end of the error amplifier EA is electrically connected to the first drive signal input end of the drive enhancement module as the first drive signal output end of the error amplification module; the reference voltage source V REF The positive electrode is grounded; the first parasitic capacitor C EA One end of the first parasitic capacitor C is electrically connected to the output end of the error amplifier EA. EA The other end is grounded.

[0015] Furthermore, the driving enhancement module includes a driving enhancement tube CA and a second parasitic capacitor C CA The input end of the drive enhancement tube CA is electrically connected to the output end of the error amplifier EA as the first drive signal input end of the drive enhancement module, and the output end of the drive enhancement tube CA is electrically connected to the gate of the MOS tube Q as the second drive signal output end of the drive enhancement module. The second parasitic capacitor C CA One end of the second parasitic capacitor C is electrically connected to the output end of the driving enhancement tube CA. CA The other end is grounded.

[0016] Furthermore, it also includes:

[0017] The output filter module is used to filter out high-frequency noise in the output voltage, smooth the output voltage, and provide or absorb energy when the load changes suddenly to maintain the stability of the output voltage.

[0018] Furthermore, the output filter module includes a filter capacitor C OUT And the equivalent series resistance R ESR ; The equivalent series resistance R ESR One end of the MOSFET is electrically connected to the source of the MOSFET Q, and the equivalent series resistance R ESR The other end of the filter capacitor C OUT Ground.

[0019] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide a method for enhancing transient response of a driver-enhanced LDO, using the driver-enhanced LDO transient response enhancing device, comprising the following steps:

[0020] Monitor the output voltage in real time and perform voltage division sampling to obtain a feedback signal;

[0021] Performing differential amplification on the feedback signal and the reference signal to obtain a first drive signal;

[0022] amplifying and enhancing the first driving signal to obtain a second driving signal;

[0023] The output voltage is adjusted under the control of the second driving signal to supply power to the load.

[0024] The drive enhancement type LDO transient response enhancement device and method of the present invention have at least the following beneficial effects: the present invention can quickly amplify the first drive signal output by the error amplification module by introducing the drive enhancement module, thereby accelerating the charging and discharging speed of the gate parasitic capacitance of the MOS tube Q in the adjustment module, so that when the load is disturbed, the LDO can adjust the output voltage to the set threshold range more quickly, and significantly improve the transient response speed of the system; the setting of the drive enhancement module not only improves the transient response speed, but also helps to improve the stability of the LDO, and effectively reduces the main pole frequency of the system by splitting the low-frequency pole at the output end of the error amplification module into two high-frequency poles. The invention improves the stability of LDO by increasing the distance between the secondary point and the main pole, facilitating zero point compensation; by precisely controlling the output voltage, the voltage overshoot or undershoot caused by insufficient transient response is reduced, which not only helps to extend the battery life of the electronic device, but also improves the overall performance and stability of the device; by setting the output filter module, not only the high-frequency noise in the output voltage can be filtered out and the output voltage can be smoothed, but also the stability of the output voltage can be maintained by providing or absorbing energy when the load changes suddenly; while improving the performance, the invention does not increase the demand for circuit bandwidth, thereby achieving high efficiency while maintaining low power consumption and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 FIG. 4 is a circuit diagram of an embodiment of a drive-enhanced LDO transient response enhancement device according to the present invention.

[0027] Figure 2 The flowchart is a method for enhancing transient response of a driver-enhanced LDO according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] See also Figure 1The drive-enhanced LDO transient response enhancement device of the present invention includes a sampling feedback module 100, an error amplification module 200, a drive enhancement module 300 and an adjustment module 400. The sampling feedback module 100 is used to monitor the output voltage of the adjustment module 400 in real time and perform voltage division sampling on it, obtain the feedback voltage, and output a feedback signal; the error amplification module 200 is used to receive the feedback signal and differentially amplify the feedback signal and the reference signal, and output a first drive signal; the drive enhancement module 300 is used to receive the first drive signal, amplify and enhance it, and output a second drive signal; the adjustment module 400 is used to receive the second drive signal, and adjust the output voltage to power the load under the control of the second drive signal. The voltage signal input terminal of the adjustment module 400 is connected to the input voltage V IN , the voltage signal output terminal of the adjustment module 400 is grounded through the load. The sampling signal input terminal of the sampling feedback module 100 is electrically connected to the voltage signal output terminal of the adjustment module 400, and the feedback signal output terminal of the sampling feedback module 100 is electrically connected to the feedback signal input terminal of the error amplification module 200. The first drive signal output terminal of the error amplification module 200 is electrically connected to the first drive signal input terminal of the drive enhancement module 300; the second drive signal output terminal of the drive enhancement module 300 is electrically connected to the second drive signal input terminal of the adjustment module 400.

[0030] The sampling feedback module 100 is used to monitor the output voltage of the adjustment module 400 in real time and perform voltage division sampling on it, obtain feedback voltage, and output feedback signal. The sampling feedback module 100 includes a first resistor R FB1 and the second resistor R FB2 The first resistor R FB1 The first end of the first resistor R is used as the sampling signal input end of the sampling feedback module 100 and is electrically connected to the source of the MOS tube Q to sample the output voltage. FB1 The second end of the FB2 The first resistor R FB1 The second end of is used as the feedback signal output end of the sampling feedback module 100 and is electrically connected to the feedback signal input end of the error amplification module 200 to transmit the feedback signal to the error amplification module 200. In this embodiment, the calculation formula of the feedback voltage is as follows:

[0031]

[0032] Among them, V FB Represents the feedback voltage, V OUT Indicates the output voltage.

[0033] The error amplification module 200 includes a reference voltage source V REF , error amplifier EA and first parasitic capacitor CEA The non-inverting input terminal of the error amplifier EA is used as the feedback signal input terminal of the error amplifier module 200 and is connected to the first resistor R FB1 The second end of the error amplifier EA is electrically connected to the reference voltage source V REF The positive electrode is electrically connected to the reference signal. The error amplifier differentially amplifies the feedback signal and the reference signal to form a first drive current I dri1 The first driving signal V T The output end of the error amplifier EA is electrically connected to the first drive signal input end of the drive enhancement module 300 as the first drive signal output end of the error amplification module 200 to output the first drive signal. REF The negative terminal of the reference voltage source V REF is a built-in stable reference voltage source, representing the desired output voltage level, which can be set according to requirements. In this embodiment, the reference voltage source V REF The first parasitic capacitor C EA One end of the first parasitic capacitor C is electrically connected to the output end of the error amplifier EA. EA The other end is grounded.

[0034] The driving enhancement module 300 is used to enhance the transient response capability of the LDO circuit. The driving enhancement module 300 includes a driving enhancement tube CA and a second parasitic capacitor C CA The input end of the driving enhancement tube CA is electrically connected to the output end of the error amplifier EA as the first driving signal input end of the driving enhancement module 300 to receive the first driving signal V T The driving enhancement module 300 increases the first driving signal V T After amplification and enhancement, a second driving signal with stronger driving capability is obtained, and the second driving current of the second driving signal is I dri2 The output end of the driving enhancement tube CA is electrically connected to the gate of the MOS tube Q as the second driving signal output end of the driving enhancement module 300 to output the second driving signal. In this embodiment, the driving enhancement tube CA is a transistor. The second parasitic capacitor C CA One end of the second parasitic capacitor C is electrically connected to the output end of the driving enhancement tube CA. CA The other end of is grounded. In this embodiment, the second driving current is I dri2 Obtained by the following formula:

[0035] I dri1 =β×I dri2

[0036] Wherein, β represents the amplification factor of the driving enhancement module 300 .

[0037] The adjustment module 400 includes a MOS tube Q and a gate parasitic capacitor C g The drain of the MOS tube Q is connected to the input voltage V IN The gate of the MOS tube Q is electrically connected to the second drive signal output end of the drive enhancement module 300 as the second drive signal input end of the adjustment module 400, and the source of the MOS tube Q is grounded through the load as the voltage signal output end of the adjustment module 400. g One end of the gate of the MOS tube Q is electrically connected, and the gate parasitic capacitance C g The other end is grounded. The load is defined as the load resistance R LOAD , the load resistance R LOAD One end of the load resistor R is electrically connected to the source of the MOS tube Q. LOAD The other end of the adjustment module 400 is connected to the input voltage V IN , under the control of the second driving signal, the output voltage is adjusted to a set threshold range. The threshold range of the output voltage can be set according to the needs. For example, when the actual output voltage is 15V, the threshold range of the output voltage can be set to 14.90V~15.10V. In this embodiment, the output voltage V OUT The calculation formula is as follows:

[0038]

[0039] The drive enhancement module 300 can effectively match the impedance of the front and rear stages, increase the transmission efficiency of the drive signal, and ensure the accuracy of the feedback control of the LDO circuit. The impedance characteristics of the error amplification module 200 and the adjustment module 400 are both high input impedance and low output impedance. The drive enhancement module 300 achieves good impedance matching between the error amplifier EA and the gate of the adjustment tube Q through its moderate input and output impedance characteristics, which not only improves the transmission efficiency of the drive signal, but also ensures the accuracy of the feedback control of the LDO circuit.

[0040] In order to filter and improve the stability of the output voltage, as a preferred embodiment, an output filter module 500 is also provided. The output filter module 500 is used to filter out high-frequency noise in the output voltage, smooth the output voltage, and provide or absorb energy when the load changes suddenly to maintain the stability of the output voltage. The output filter module 500 includes a filter capacitor C OUT And the equivalent series resistance R ESR ; The equivalent series resistance R ESROne end of the MOSFET is electrically connected to the source of the MOSFET Q, and the equivalent series resistance R ESR The other end of the filter capacitor C OUT Ground.

[0041] In this embodiment, when the load of the LDO circuit is disturbed, that is, the load resistance R LOAD changes, the load current changes accordingly, and the output voltage V OUT Under the action of the driving enhancement module 300, the enhanced second driving signal can make the gate parasitic capacitance C of the MOS tube Q g To achieve fast charging and discharging, the control adjustment module 400 accelerates the adjustment of the output voltage to within the set threshold range. The calculation formula for the change in output voltage is as follows:

[0042]

[0043] Where, ΔV OUT represents the change in output voltage, Δt represents the change time of output voltage, ΔI OUT Indicates the change in load current, C OUT Represents the filter capacitor at output.

[0044] The output voltage change time Δt is obtained by the following formula:

[0045]

[0046] Among them, C g Represents the equivalent capacitance of the gate of the adjustment tube, V g Indicates the gate voltage of the adjustment tube.

[0047] The driving enhancement module 300 is arranged between the error amplification module 200 and the adjustment module 400, and splits the low-frequency pole at the output end of the error amplification module 200 into two high-frequency poles to improve the stability of the LDO. In the LDO circuit without the driving enhancement module 300, there are two left half plane poles and one left half plane zero. The calculation formula of the pole at the output end of the adjustment module 400 is as follows:

[0048]

[0049] Among them, P 1 represents the pole at the output of the adjustment module 400, R 0 Represents the equivalent resistance of the output end of the adjustment module 400.

[0050] The calculation formula of the pole at the output end of the error amplifier module 200 is as follows:

[0051]

[0052] P 2 represents the pole at the output end of the error amplifier module 200, R EA Represents the equivalent resistance of the output end of the error amplification module 200.

[0053] The calculation formula of the zero point at the output end of the adjustment module 400 is as follows:

[0054]

[0055] Among them, Z 1 represents the zero point at the output of the adjustment module 400, R ESR Represents the equivalent series resistance of the filter capacitor. 1 is the main pole, P 2 In this embodiment, the drive enhancement module 300 is disposed between the error amplification module 200 and the adjustment tube module, and the pole P2 is split into two high-frequency poles. The calculation formula of the pole at the output end of the error amplification module 200 is as follows:

[0056]

[0057] Among them, P 21 represents the pole at the output end of the error amplifier module 200, R EA Represents the equivalent resistance of the output end of the error amplification module 200.

[0058] The calculation formula of the pole at the output end of the driving enhancement module 300 is as follows:

[0059]

[0060] Among them, P 22 represents the pole at the output of the driver enhancement module 300, R CA Represents the equivalent resistance of the output end of the driving enhancement module 300.

[0061] The pole P at the output of the adjustment module 400 1 And the zero point Z at the output of the adjustment module 400 1 The calculation of P is the same as that when the driving enhancement module 300 is not provided, and will not be described in detail here. 1 is the main pole, P 21 and P 22 Both are secondary poles. The primary pole is small and the secondary pole is large. The distance between them is far, which is convenient for the zero point Z 1 Compensation to improve its stability.

[0062] The present invention also discloses a method for enhancing transient response of a driver-enhanced LDO, which is implemented based on the driver-enhanced LDO transient response enhancing device of the above embodiment. Figure 2 , is a flow chart of an embodiment of a method for enhancing transient response of a driver-enhanced LDO according to the present invention. This embodiment specifically includes the following steps:

[0063] S1, monitor the output voltage in real time and perform voltage division sampling to obtain a feedback signal.

[0064] Specifically, the sampling feedback module 100 monitors the output voltage of the adjustment module 400 in real time and performs voltage division sampling on it, obtains the feedback voltage, and outputs the feedback signal. The sampling feedback module 100 transmits the feedback signal to the error amplification module 200 .

[0065] S2. Perform differential amplification on the feedback signal and the reference signal to obtain a first drive signal.

[0066] Specifically, the error amplification module 200 obtains a reference signal based on a built-in reference voltage source, and after receiving the feedback signal, the error amplification module 200 differentially amplifies the feedback signal and the reference signal, calculates the difference between them, and amplifies the difference to form a first drive signal. The error amplification module 200 transmits the first drive signal to the drive enhancement module 300.

[0067] S3. Amplify and enhance the first driving signal to obtain a second driving signal.

[0068] Specifically, after receiving the first driving signal, the driving enhancement module 300 amplifies and enhances the first driving signal to obtain a second driving signal with sufficient driving capability and transmits the second driving signal to the adjustment module 400 .

[0069] S4. Under the control of the second driving signal, adjust the output voltage to supply power to the load.

[0070] Specifically, after receiving the second driving signal, the adjustment module 400 responds quickly under the driving of the second driving signal and adjusts the output voltage so that the output voltage remains within a set threshold range.

[0071] The present invention can rapidly amplify the first driving signal output by the error amplification module by introducing the driving enhancement module 300, thereby accelerating the adjustment of the gate parasitic capacitance C of the MOS tube Q in the module 400. gThe charging and discharging speed of the LDO is improved, so that when the load is disturbed, the LDO can adjust the output voltage to the set threshold range more quickly, which significantly improves the transient response speed of the system; the setting of the driving enhancement module 300 not only improves the transient response speed, but also helps to improve the stability of the LDO. By splitting the pole at the output end of the error amplification module 200 into two high-frequency poles, the main pole frequency of the device is effectively reduced, and the distance between the secondary point and the main pole is increased, which is convenient for zero point compensation, thereby improving the stability of the LDO; by accurately controlling the output voltage, the voltage overshoot or undershoot caused by insufficient transient response is reduced, which not only helps to extend the battery life of the electronic device, but also improves the overall performance and stability of the device; by setting the output filtering module 500, not only the high-frequency noise in the output voltage can be filtered out and the output voltage can be smoothed, but also the stability of the output voltage can be maintained by providing or absorbing energy when the load changes suddenly; while improving the performance, the present invention does not increase the demand for circuit bandwidth, thereby achieving high efficiency while maintaining low power consumption and cost.

Claims

1. A drive-enhanced LDO transient response enhancement device, characterized in that: include: The sampling feedback module is used to monitor the output voltage of the adjustment module in real time and perform voltage division sampling on it, obtain the feedback voltage, and output a feedback signal; an error amplification module, configured to receive the feedback signal, differentially amplify the feedback signal and a reference signal, and output a first drive signal; A driving enhancement module, used for receiving the first driving signal, amplifying and enhancing it, and outputting a second driving signal; as well as The adjustment module is used to receive the second driving signal and adjust the output voltage to supply power to the load under the control of the second driving signal.

2. The device for enhancing transient response of a driver-enhanced LDO according to claim 1, characterized in that: The voltage signal input end of the adjustment module is connected to the input voltage, the voltage signal output end of the adjustment module is grounded through a load, the sampling signal input end of the sampling feedback module is electrically connected to the voltage signal output end of the adjustment module, the feedback signal output end of the sampling feedback module is electrically connected to the feedback signal input end of the error amplification module, the first drive signal output end of the error amplification module is electrically connected to the first drive signal input end of the drive enhancement module, and the second drive signal output end of the drive enhancement module is electrically connected to the second drive signal input end of the adjustment module.

3. The drive-enhanced LDO transient response enhancement device according to claim 2, characterized in that: The adjustment module includes a MOS tube Q and a gate parasitic capacitor C g The drain of the MOS tube Q is connected to the input voltage, the gate of the MOS tube Q is electrically connected to the second drive signal output end of the drive enhancement module as the second drive signal input end of the adjustment module, the source of the MOS tube Q is grounded through the load as the voltage signal output end of the adjustment module, and the gate parasitic capacitance C g One end of the gate of the MOS tube Q is electrically connected, and the gate parasitic capacitance C g The other end is grounded.

4. The device for enhancing transient response of a driver-enhanced LDO according to claim 3, characterized in that: The load is defined as the load resistance R LOAD , the load resistance R LOAD One end of the load resistor R is electrically connected to the source of the MOS tube Q. LOAD The other end is grounded.

5. The drive-enhanced LDO transient response enhancement device according to claim 3, characterized in that: The sampling feedback module includes a first resistor R FB1 and the second resistor R FB2 The first resistor R FB1 The first end of the sampling feedback module is electrically connected to the source of the MOS tube Q as the sampling signal input end of the sampling feedback module. FB1 The second end is connected through the second resistor R FB2 grounded, the first resistor R FB1 The second end of is used as the feedback signal output end of the sampling feedback module and is electrically connected to the feedback signal input end of the error amplification module.

6. The device for enhancing transient response of a driver-enhanced LDO according to claim 5, characterized in that: The error amplification module includes a reference voltage source V REF , error amplifier EA and first parasitic capacitor C EA The in-phase input terminal of the error amplifier EA is used as the feedback signal input terminal of the error amplifier module and the first resistor R FB1 The second end is electrically connected to the inverting input terminal of the error amplifier EA and the reference voltage source V REF The positive electrode of the error amplifier EA is electrically connected to the reference signal, and the output end of the error amplifier EA is electrically connected to the first drive signal input end of the drive enhancement module as the first drive signal output end of the error amplification module; the reference voltage source V REF The positive electrode is grounded; the first parasitic capacitor C EA One end of the first parasitic capacitor C is electrically connected to the output end of the error amplifier EA. EA The other end is grounded.

7. The device for enhancing transient response of a driver-enhanced LDO according to claim 6, characterized in that: The driving enhancement module includes a driving enhancement tube CA and a second parasitic capacitor C CA ; The input end of the driving enhancement tube CA is electrically connected to the output end of the error amplifier EA as the first driving signal input end of the driving enhancement module, and the output end of the driving enhancement tube CA is electrically connected to the gate of the MOS tube Q as the second driving signal output end of the driving enhancement module. CA One end of the second parasitic capacitor C is electrically connected to the output end of the driving enhancement tube CA. CA The other end is grounded.

8. The drive-enhanced LDO transient response enhancement device according to claim 3, characterized in that: Also includes: The output filter module is used to filter out high-frequency noise in the output voltage, smooth the output voltage, and provide or absorb energy when the load changes suddenly to maintain the stability of the output voltage.

9. The device for enhancing transient response of a driver-enhanced LDO according to claim 8, characterized in that: The output filter module includes a filter capacitor C OUT And the equivalent series resistance R ESR ; The equivalent series resistance R ESR One end of the MOSFET is electrically connected to the source of the MOSFET Q, and the equivalent series resistance R ESR The other end of the filter capacitor C OUT Ground.

10. A method for enhancing transient response of a driver-enhanced LDO, characterized in that: The drive-enhanced LDO transient response enhancement device according to any one of claims 1 to 9 comprises the following steps: Monitor the output voltage in real time and perform voltage division sampling to obtain a feedback signal; Performing differential amplification on the feedback signal and the reference signal to obtain a first drive signal; amplifying and enhancing the first driving signal to obtain a second driving signal; The output voltage is adjusted under the control of the second driving signal to supply power to the load.

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