Low-dropout linear stabilized power supply and integrated circuit

Abstract

The utility model provides a low-dropout linear stabilized power supply and an integrated circuit, which are applied to the technical field of integrated circuits, the power supply comprises a band-gap reference source circuit and an amplifier module, the amplifier module comprises a folding operational amplifier, the band-gap reference source circuit is connected with the folding operational amplifier and provides auxiliary voltage for the folding operational amplifier, and the folding operational amplifier is connected with the band-gap reference source circuit. The auxiliary voltage is superposed with the working voltage of the folding type operational amplifier, so that the working voltage actually corresponding to the folding type operational amplifier is increased, the normal operation of the folding type operational amplifier is ensured, the power supply rejection ratio of the low-dropout linear stabilized power supply is further improved, and the operation performance of the low-dropout linear stabilized power supply is improved; it is ensured that the low-dropout linear stabilized power supply can still operate normally under the low working voltage, and the actual use requirement is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of integrated circuits, in particular to a low dropout linear voltage regulator and an integrated circuit. BACKGROUND

[0002] In recent years, as the process size of integrated circuits becomes smaller and smaller, the working voltage of integrated circuits is set lower and lower, which seriously affects the operation performance of some functional modules in the integrated circuits, and even causes problems in normal operation.

[0003] Taking a low dropout linear voltage regulator (LDO) as an example, when the LDO is applied to an advanced process such as a 7nm process, since the working voltage under the 7nm process is only 1.8V, the folded operational amplifier inside the LDO cannot operate normally, which seriously reduces the performance parameters of the LDO, and the influence on the power supply rejection ratio (PSRR) is particularly obvious, which causes the LDO to be difficult to meet the use requirements.

[0004] Therefore, how to optimize the performance of the low dropout linear voltage regulator, improve the power supply rejection ratio, and meet the operation requirements of low working voltage has become one of the technical problems to be solved by the technical personnel in the field. CONTENT OF THE INVENTION

[0005] Therefore, the present application is committed to providing a low dropout linear voltage regulator and an integrated circuit, which optimizes the operation performance of the low dropout linear voltage regulator, improves the power supply rejection ratio, ensures that the low dropout linear voltage regulator can still operate normally under a lower working voltage, and meets the actual use requirements.

[0006] In a first aspect, the present application provides a low dropout linear voltage regulator, comprising a bandgap reference source circuit and an amplifier module, wherein,

[0007] The amplifier module comprises a folded operational amplifier;

[0008] The bandgap reference source circuit is connected to the folded operational amplifier and provides an auxiliary voltage to the folded operational amplifier, and the auxiliary voltage is superimposed with the working voltage of the folded operational amplifier.

[0009] In an optional embodiment, the folded operational amplifier comprises a first cascade circuit and a second cascade circuit, wherein,

[0010] The first cascade circuit and the second cascade circuit each comprise a plurality of cascaded controllable switch tubes;

[0011] The bandgap reference source circuit is connected to the first cascade circuit and the second cascade circuit respectively.

[0012] In an alternative embodiment, the first cascade circuit and the second cascade circuit are connected in parallel to obtain a first parallel branch.

[0013] One end of the first parallel branch receives the working voltage, and the other end of the first parallel branch is grounded.

[0014] The control end of the controllable switch tube close to the ground end of the first parallel branch in the first cascade circuit and the second cascade circuit is connected to the bandgap reference source circuit.

[0015] In an alternative embodiment, the first cascade circuit and the second cascade circuit each include four controllable switch tubes.

[0016] In an alternative embodiment, the four controllable switch tubes of the first cascade circuit include a first PMOS tube, a second PMOS tube, a first NMOS tube and a second NMOS tube connected in sequence.

[0017] The four controllable switch tubes of the second cascade circuit include a third PMOS tube, a fourth PMOS tube, a third NMOS tube and a fourth NMOS tube connected in sequence.

[0018] The gate of the first PMOS tube is connected to the gate of the third PMOS tube, and the gate connection point of the first PMOS tube and the third PMOS tube is connected to the first NMOS tube.

[0019] The gate of the second PMOS tube is connected to the gate of the fourth PMOS tube.

[0020] The gates of the second NMOS tube and the fourth NMOS tube are connected to the bandgap reference source circuit respectively.

[0021] In an alternative embodiment, the amplifier module further includes a common-gate amplifier, wherein,

[0022] The input end of the common-gate amplifier is connected to the input end of the folded operational amplifier.

[0023] The output end of the common-gate amplifier serves as the output end of the amplifier module.

[0024] In an alternative embodiment, the low-dropout linear voltage regulator provided in the first aspect of the present application further includes a differential voltage control circuit, a load balancing circuit and a feedback circuit, wherein,

[0025] The differential pressure control circuit is connected with the amplifier module, and the differential pressure control circuit is connected with the load balancing circuit and the feedback circuit respectively.

[0026] The load balancing circuit and the feedback circuit are connected with the amplifier module respectively.

[0027] The output end of the load balancing circuit is used for connecting the power load.

[0028] In an alternative embodiment, the load balancing circuit comprises a voltage dividing circuit and a resistance-capacitance circuit, wherein,

[0029] The voltage dividing circuit is connected with the resistance-capacitance circuit in parallel to obtain a second parallel branch.

[0030] The input end of the second parallel branch is connected with the feedback circuit and the differential pressure control circuit respectively, and the input end of the second parallel branch is used for connecting the power load.

[0031] The other end of the second parallel branch is grounded.

[0032] In an alternative embodiment, the differential pressure control circuit comprises a plurality of controllable switch tubes connected in parallel.

[0033] In a second aspect, the application provides an integrated circuit comprising at least one low differential voltage linear voltage stabilizing power supply according to any one of the first aspect of the application.

[0034] Based on the above, the low differential voltage linear voltage stabilizing power supply provided by the application comprises a band gap reference source circuit and an amplifier module, the amplifier module comprises a folded operational amplifier, the band gap reference source circuit is connected with the folded operational amplifier, and the band gap reference source circuit provides an auxiliary voltage to the folded operational amplifier, the auxiliary voltage is superposed with the working voltage of the folded operational amplifier, so that the actual working voltage corresponding to the folded operational amplifier is increased, the normal operation of the folded operational amplifier is ensured, the power supply rejection ratio of the low differential voltage linear voltage stabilizing power supply is improved, the operation performance of the low differential voltage linear voltage stabilizing power supply is improved, the low differential voltage linear voltage stabilizing power supply can still operate normally under a lower working voltage, and the actual use demand is met. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0036] Figure 1The utility model embodiment provides a kind of structure block diagram of low dropout linear regulated power supply.

[0037] Figure 2 The utility model embodiment provides a kind of circuit topology of folding operational amplifier.

[0038] Figure 3 It is the circuit topology of band gap reference source circuit in prior art.

[0039] Figure 4 The utility model embodiment provides a kind of circuit topology of low dropout linear regulated power supply. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0041] As described above, due to the working voltage setting of integrated circuits being lower and lower in recent years, the running performance of some functional modules in the integrated circuits is seriously affected, and even the normal operation is difficult to achieve. For the low dropout linear regulated power supply, when the LDO is applied to advanced processes, such as 7nm process, since the working voltage under 7nm process is only 1.8V, the folding operational amplifier inside the LDO cannot operate normally, which seriously reduces the performance parameters of the LDO, especially the influence on the power supply rejection ratio (PSRR) is particularly obvious, which makes it difficult for the LDO to meet the use requirements.

[0042] To solve the above problems, the present application provides a kind of low dropout linear regulated power supply, including band gap reference source circuit and amplifier module, folding operational amplifier is configured in amplifier module, band gap reference source circuit provides auxiliary voltage to folding operational amplifier, the auxiliary voltage is superimposed with the working voltage of folding operational amplifier, to increase the working voltage actually corresponding to folding operational amplifier, ensure that folding operational amplifier normal operation, to improve the power supply rejection ratio of low dropout linear regulated power supply, improve the running performance of low dropout linear regulated power supply, ensure that low dropout linear regulated power supply still can normal operation under lower working voltage, meet actual use demand.

[0043] Based on the above content, referring to Figure 1The low-dropout linear voltage regulator provided in the application comprises a bandgap reference source circuit 10 and an amplifier module 20, of course, the low-dropout linear voltage regulator also comprises other components, which will be described in the following content, and will not be described here.

[0044] In combination Figure 1 As shown in the low-dropout linear voltage regulator provided in the application, the amplifier module 20 comprises a folded operational amplifier U1. The folded operational amplifier U1 is provided with a positive input end Vp and a negative input end Vn. In an optional embodiment, the negative input end Vn is used to receive a reference voltage, that is, the output voltage of the low-dropout linear voltage regulator, and the positive input end Vp is used to receive a feedback voltage, which is specifically provided by a feedback circuit in the low-dropout linear voltage regulator, which will be shown in the following embodiments. In the prior art, the folded operational amplifier U1 is connected with a system power supply (not shown in the background art), and the system power supply provides a working voltage for the folded operational amplifier U1. As described above, due to the reduction of the overall voltage level of the system power supply, the folded operational amplifier U1 is difficult to operate normally. Figure 1

[0045] Further, the low-dropout linear voltage regulator provided in the application is also provided with a bandgap reference source circuit 10, and the bandgap reference source circuit 10 is connected with the folded operational amplifier U1. It can be understood that the bandgap reference source circuit 10 can output current and voltage to the outside as a power supply circuit. In the prior art, the bandgap reference source circuit is only used to provide current for other components in the low-dropout linear voltage regulator. Different from the related art, the bandgap reference source circuit 10 in the application provides an auxiliary voltage for the folded operational amplifier U1, and the auxiliary voltage is superimposed with the working voltage of the folded operational amplifier U1, so as to increase the actual voltage applied to the folded operational amplifier U1, to ensure that the related components in the folded operational amplifier U1 can operate normally, and to further ensure the normal operation of the folded operational amplifier U1, which plays an important role in improving the PSRR of the low-dropout linear voltage regulator.

[0046] In summary, compared with the related art which only uses the output current provided by the bandgap reference source circuit, the low-dropout linear voltage regulator provided in the application further uses the voltage outputted by the bandgap reference source circuit as an auxiliary voltage, which is superimposed with the working voltage of the folded operational amplifier, to increase the actual voltage applied to the folded operational amplifier, to ensure that the related components in the folded operational amplifier can operate normally, to further improve the PSRR of the low-dropout linear voltage regulator, to improve the operation performance of the low-dropout linear voltage regulator, and to ensure that the low-dropout linear voltage regulator can operate normally under a lower working voltage, to meet the actual use requirements. ​

[0047] Based on the above, this application provides an optional configuration of a folded operational amplifier, see [link to relevant documentation]. Figure 2 As shown, the folded operational amplifier provided in this application includes a first cascade circuit 210 and a second cascade circuit 220.

[0048] The first cascaded circuit 210 and the second cascaded circuit 220 each include multiple cascaded controllable switching transistors. Figure 2 In the example shown, four controllable switching transistors are used. Specifically, the first cascaded circuit 210 includes a first PMOS transistor Pmos1, a second PMOS transistor Pmos2, a first NMOS transistor Nmos1, and a second NMOS transistor Nmos2 cascaded in sequence, and the second cascaded circuit 220 includes a third PMOS transistor Pmos3, a fourth PMOS transistor Pmos4, a third NMOS transistor Nmos3, and a fourth NMOS transistor Nmos4 cascaded in sequence.

[0049] Combination Figure 2 As shown, the gate of the first PMOS transistor Pmos1 is connected to the gate of the third PMOS transistor Pmos3, and the gate connection point of the first PMOS transistor Pmos1 and the third PMOS transistor Pmos3 is connected to the first NMOS transistor Nmos1. The gate of the second PMOS transistor Pmos2 is connected to the gate of the fourth PMOS transistor Pmos4. One end of the second NMOS transistor Nmos2 and one end of the fourth NMOS transistor Nmos4 are grounded.

[0050] Based on the above specific implementation, the first cascade circuit 210 and the second cascade circuit 220 are connected in parallel to obtain a first parallel branch. One end of this first parallel branch is used to receive the operating voltage of the folded operational amplifier. Figure 2 (Not shown in the diagram), the other end of the first parallel branch is grounded (i.e., one end of the second NMOS transistor Nmos2 and one end of the fourth NMOS transistor Nmos4 are grounded). More importantly, in the first cascade circuit 210 and the second cascade circuit 220, the control terminal of the controllable switch near the grounded end of the first parallel branch is connected to the bandgap reference source circuit and receives the auxiliary voltage provided by the bandgap reference source circuit. Specifically... Figure 2 In the embodiment shown, the control terminals of the second Nmos transistor Nmos2 and the fourth Nmos transistor Nmos4 are connected to the bandgap reference source circuit and receive the auxiliary voltage Vref provided by the bandgap reference source circuit.

[0051] Furthermore, Figure 2 Other components of the folded operational amplifier, such as Pmos5, Nmos5, and Nmos6, are also shown; their specific connections can be found in [reference needed]. Figure 2As shown, details are not described herein. Of course, other components can also be included in the folded operational amplifier, and details can be referred to related technologies, which are not described herein.

[0052] In combination Figure 2 As shown, in related technologies, assuming that the working voltage provided by the system power supply is 1.8V, and the threshold voltage of each controllable switch tube is 0.6V, then in the case that the first cascade circuit 210 and the second cascade circuit 220 include four cascaded controllable switch tubes, the working voltage provided by the system power supply can only drive three controllable switch tubes to operate normally, and one controllable switch tube in the first cascade circuit 210 and the second cascade circuit 220 will not operate normally, that is, the folded operational amplifier cannot be completely turned on, thereby affecting the operating performance of the low-dropout linear voltage regulator.

[0053] Compared with related technologies, in the low-dropout linear voltage regulator provided by the present application, the auxiliary voltage is provided to the first cascade circuit 210 and the second cascade circuit 220 by the bandgap reference source circuit, which is equivalent to increasing the ground potential of the first cascade circuit 210 and the second cascade circuit 220. The auxiliary voltage is superimposed with the working voltage provided by the system power supply, thereby increasing the actual voltage applied to the folded operational amplifier. Taking the auxiliary voltage of 0.7V as an example, the actual voltage applied to the folded operational amplifier will be 2.5V. Based on the voltage division principle of the cascade circuit, each controllable switch tube in the first cascade circuit 210 and the second cascade circuit 220 can obtain a threshold voltage of about 0.6V, thereby realizing the normal operation of each controllable switch tube, that is, ensuring the normal opening of the folded operational amplifier.

[0054] It can be understood that in actual application, the specific value of the auxiliary voltage provided by the bandgap reference source circuit needs to be determined in combination with the specific number of controllable switch tubes cascaded in the first cascade circuit and the second cascade circuit of the folded operational amplifier, the threshold voltage of each controllable switch tube, and the specific value of the working voltage provided by the system power supply. The working requirements of each cascaded controllable switch tube are met after the auxiliary voltage and the working voltage are superimposed. Details are not described herein, and within the scope of the present application without departing from the core idea of the present application.

[0055] As for the specific implementation of the bandgap reference source circuit, please refer to Figure 3 As shown, in actual application, the specific resistance of the resistors R5, R6 and R7 can be configured according to actual needs, so as to make the bandgap reference source circuit output different auxiliary voltages Vref. Of course, Figure 3 As shown, it is only an optional implementation of the bandgap reference source circuit, and in actual application, the bandgap reference source circuit can also be built by other ways, and details can be referred to related technologies, which are not described herein.

[0056] Further, based on the optional implementation of the folded operational amplifier and the bandgap reference source circuit provided in the foregoing embodiments, the application provides another low-dropout linear voltage regulator. Referring to Figure 4 the foregoing embodiments, the low-dropout linear voltage regulator provided in the embodiment further includes a differential voltage control circuit 30, a load balancing circuit 40, and a feedback circuit 50. Further, the amplifier module 20 further includes a common-gate amplifier U2.

[0057] In combination Figure 4 the input end of the common-gate amplifier U2 is connected to the input end of the folded operational amplifier U1, and the output end of the common-gate amplifier U2 serves as the output end of the amplifier module 20 and is connected to the differential voltage control circuit 30. Further, the bandgap reference source circuit 10 is also connected to the common-gate amplifier U2 to provide the operating current required for the operation of the common-gate amplifier U2.

[0058] The differential voltage control circuit 30 includes a plurality of controllable switching tubes connected in parallel, Figure 4 in which K Pmos tubes are taken as an example. The parallel connection point of each controllable switching tube receives the operating voltage Vdd. The control end of each controllable switching tube is connected to the output end of the amplifier module 20, specifically the common-gate amplifier U2. The other end of each controllable switching tube serves as the output end of the differential voltage control circuit 30 and is connected to the load balancing circuit 40 and the feedback circuit 50.

[0059] Further, the load balancing circuit 40 is connected to the feedback circuit 50, the differential voltage control circuit 30, and the amplifier module 20. The load balancing circuit 40 includes a voltage dividing circuit 410 and a resistance-capacitance circuit 420. In combination Figure 4 the voltage dividing circuit 410 and the resistance-capacitance circuit 420 are connected in parallel to obtain a second parallel branch. The input end of the second parallel branch is connected to the feedback circuit 50 and the differential voltage control circuit 30. At the same time, the input end of the second parallel branch, as the output end Vout of the load balancing circuit 40, also serves as the load end of the low-dropout linear voltage regulator and is used to connect the power load (not shown in the figure). Figure 4 The other end of the second parallel branch is grounded. The load balancing circuit 40 can adjust the stability of the output voltage of the low-dropout linear voltage regulator to provide a higher quality power supply voltage for the power load.

[0060] As an optional implementation, the voltage dividing circuit 410 comprises a first voltage dividing resistor R2 and a second voltage dividing resistor R3, one end of the first voltage dividing resistor R2 is connected with the voltage dividing circuit 410 as an input terminal, and is connected with the resistance-capacitance circuit 420, the other end of the first voltage dividing resistor R2 is connected with one end of the second voltage dividing resistor R3, the other end of the second voltage dividing resistor R3 is grounded, and the connection point of the first voltage dividing resistor R2 and the second voltage dividing resistor R3 is connected with the positive input terminal of the folded operational amplifier U1 as an output terminal of the voltage dividing circuit 410.

[0061] The resistance-capacitance circuit 420 comprises a resistor R4 and a capacitor C2, which are connected in series. Figure 4 As shown in the figure, one end of the resistor R4 is connected with the resistance-capacitance circuit 420 as an input terminal, and is connected with the voltage dividing circuit 410, and the other end of the resistor R4 is connected with one end of the capacitor C2, and the other end of the capacitor C2 is grounded.

[0062] The feedback circuit 50 comprises a resistor R1 and a capacitor C1, which are connected in series. Figure 4 As shown in the figure, one end of the resistor R1 is connected with one end of the capacitor C1, the other end of the resistor R1 is connected with the load balancing circuit 40 as a first output terminal of the feedback circuit 50, the other end of the capacitor C1 is connected with the folded operational amplifier U1 as a second output terminal of the feedback circuit 50, and the connection point of the resistor R1 and the capacitor C1 is connected with the differential control circuit 30 as an input terminal of the feedback circuit 50. The feedback circuit 50 can feed back the feedback signal required for adjusting the output voltage of the folded operational amplifier U1 to the folded operational amplifier U1.

[0063] In summary, compared with the foregoing embodiments, the present embodiment provides an optional implementation of a low-dropout linear voltage regulator, and shows the specific implementation of the differential control circuit, the feedback circuit, and the load balancing circuit, etc. However, the key of the present embodiment is still to provide an auxiliary voltage to the folded operational amplifier through the bandgap reference source circuit, and the auxiliary voltage is superimposed with the working voltage of the folded operational amplifier, so as to increase the actual working voltage corresponding to the folded operational amplifier, ensure the normal operation of the folded operational amplifier, and further improve the power supply rejection ratio of the low-dropout linear voltage regulator, improve the operation performance of the low-dropout linear voltage regulator, ensure that the low-dropout linear voltage regulator can still operate normally under a lower working voltage, and meet the actual use requirements.

[0064] It should be noted that other components of the low-dropout linear voltage regulator which are not described in detail in the foregoing content and Figure 4 the specific working process of the circuit topology shown in the figure can be implemented by referring to the related technology, and will not be described in detail here. Figure 4

[0065] ​Further, the application also provides an integrated circuit comprising the low-dropout linear voltage regulator power supply provided by any one of the preceding embodiments of the application, and the power supply is used to supply power to the power consuming load in the integrated circuit.

[0066] Those skilled in the art will appreciate that the disclosure disclosed herein is susceptible to variations and modifications other than those specifically described. It is to be understood that the application includes all such variations and modifications. For example, the various devices or components described above can be implemented by hardware, or by software, firmware, or a combination of some or all of the above.

[0067] In addition, while the present disclosure has been described with respect to certain embodiments thereof, those skilled in the art will note that various substitutions and modifications can be made thereto without departing from the scope of the present disclosure. For example, different units can be used and various elements can be operated on the client and / or server. The units are illustrative only and different aspects of the system and method can use different units.

[0068] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0069] The foregoing is a summary of the present disclosure and is not to be considered as limiting its scope. Although several exemplary embodiments of the present disclosure have been described, those skilled in the art will readily understand that many modifications can be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Accordingly, all such modifications are intended to be included within the scope of the present disclosure as defined in the following claims. It is to be understood that the above description is intended to be illustrative, and not restrictive. Many other embodiments will be apparent to those of skill in the art upon reviewing the above description. The scope of the present disclosure is, therefore, indicated by the appended claims, rather than the foregoing description.

Claims

1. A low dropout linear voltage regulator power supply, characterized by, include: The bandgap reference source circuit and amplifier module, among which, The amplifier module includes a foldable operational amplifier; The bandgap reference source circuit is connected to the folded operational amplifier and provides an auxiliary voltage to the folded operational amplifier. The auxiliary voltage is superimposed on the operating voltage of the folded operational amplifier.

2. The low dropout linear voltage regulator power supply of claim 1, wherein, The folded operational amplifier includes a first cascaded circuit and a second cascaded circuit, wherein... The first cascaded circuit and the second cascaded circuit each include multiple cascaded controllable switching transistors; The bandgap reference source circuit is connected to the first cascaded circuit and the second cascaded circuit, respectively.

3. The low dropout linear voltage regulator of claim 2, wherein, The first cascaded circuit and the second cascaded circuit are connected in parallel to form the first parallel branch; One end of the first parallel branch receives the operating voltage, and the other end of the first parallel branch is grounded; In the first cascaded circuit and the second cascaded circuit, the control terminal of the controllable switch near the ground terminal of the first parallel branch is connected to the bandgap reference source circuit.

4. The low dropout linear voltage regulator power supply of claim 3, wherein, The first cascaded circuit and the second cascaded circuit each include four controllable switching transistors.

5. The low dropout linear voltage regulator power supply of claim 4, wherein, The four controllable switching transistors of the first cascaded circuit include a first PMOS transistor, a second PMOS transistor, a first NMOS transistor, and a second NMOS transistor cascaded in sequence; The four controllable switching transistors of the second cascaded circuit include a third PMOS transistor, a fourth PMOS transistor, a third NMOS transistor, and a fourth NMOS transistor cascaded in sequence. The gate of the first PMOS transistor is connected to the gate of the third PMOS transistor, and the gate connection point of the first PMOS transistor and the third PMOS transistor is connected to the first NMOS transistor. The gate of the second PMOS transistor is connected to the gate of the fourth PMOS transistor; The gates of the second NMOS transistor and the fourth NMOS transistor are respectively connected to the bandgap reference source circuit.

6. The low dropout linear voltage regulator power supply of claim 1, wherein, The amplifier module further includes a common-gate amplifier, wherein... The input terminal of the common-gate amplifier is connected to the input terminal of the folded operational amplifier; The output terminal of the common-gate amplifier serves as the output terminal of the amplifier module.

7. The low dropout linear voltage regulator power supply of claim 1, wherein, Also includes: The circuit includes a differential pressure control circuit, a load balancing circuit, and a feedback circuit. The differential pressure control circuit is connected to the amplifier module, and the differential pressure control circuit is also connected to the load balancing circuit and the feedback circuit. The load balancing circuit and the feedback circuit are respectively connected to the amplifier module; The output of the load balancing circuit is used to connect to the electrical load.

8. The low dropout linear voltage regulator power supply of claim 7, wherein, The load balancing circuit includes a voltage divider circuit and a resistor-capacitor circuit, wherein... The voltage divider circuit is connected in parallel with the resistor-capacitor circuit to form a second parallel branch; The input terminal of the second parallel branch is connected to the feedback circuit and the differential pressure control circuit respectively, and the input terminal of the second parallel branch is used to connect to the electrical load. The other end of the second parallel branch is grounded.

9. The low dropout linear voltage regulator power supply of claim 7, wherein, The differential pressure control circuit includes multiple controllable switching transistors connected in parallel.

10. An integrated circuit, characterized by It includes at least one low-dropout linear regulated power supply as described in any one of claims 1 to 9.

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