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Fast transient linear voltage regulator circuit with high power supply rejection ratio

A technology of high power supply rejection ratio and linear voltage regulator, which is applied in the direction of instruments, electric variable adjustment, control/regulation systems, etc., can solve the problems affecting the performance of equipment, lack of high power supply rejection ratio and fast transient response, etc., to achieve Effects of improved performance, adaptive static power consumption, and high power supply rejection ratio

Active Publication Date: 2021-05-28
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the Chinese invention patent application with the publication number CN106354186A disclosed a low-dropout linear voltage regulator on January 25, 2017. The disclosed circuit effectively expands the loop bandwidth and improves the transient characteristics. The circuit implementation method Simple, but under low power consumption conditions, it does not have the characteristics of high power supply rejection ratio and fast transient response, which may affect the performance of the device in the actual application process

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  • Fast transient linear voltage regulator circuit with high power supply rejection ratio
  • Fast transient linear voltage regulator circuit with high power supply rejection ratio
  • Fast transient linear voltage regulator circuit with high power supply rejection ratio

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Embodiment 1

[0049] Such as figure 1 As shown, the embodiment of the present invention provides a high power supply rejection ratio fast transient linear regulator circuit, including: a differential operational amplifier 1, a nested inverted voltage follower circuit module 2 and a current adaptive bias circuit module 3 ;

[0050] The differential operational amplifier 1 is connected to the nested inverted voltage follower circuit module 2, and the current adaptive bias circuit module 3 is connected to the differential operational amplifier 1 and the nested inverted voltage follower circuit module 2 connections;

[0051] The differential operational amplifier 1 is used to increase the loop gain of the linear voltage regulator to improve the accuracy of the output voltage;

[0052] The nested inverted voltage follower circuit module 2 is used as the output stage of the linear voltage regulator, and provides load capacity; and is connected with the differential operational amplifier 1; wher...

Embodiment 2

[0061] More specifically, on the basis of Embodiment 1, the nested inverted voltage follower circuit module 2 uses the gate of the PMOS transistor M11 as the input and the source as the output, and can be designed when a suitable gate voltage of M11 is given. to get the output voltage V out , the self-feedback loop of the nested inverted voltage follower circuit module is used as an internal voltage regulation loop for output voltage.

[0062] The differential operational amplifier 1 is connected with the nested inverted voltage follower circuit module 2, in this embodiment as figure 1 , figure 2 connection shown. This connection mode makes the differential operational amplifier 1 and the nested inverted voltage follower circuit module 2 form an external adjustment loop, and as a result, the linear regulation rate and load regulation rate of the low dropout linear regulator are further improved. promote.

[0063] The current self-adaptive biasing circuit module 3 is compo...

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Abstract

The invention provides a fast transient linear voltage regulator circuit with a high power supply rejection ratio. The internal bias current of a linear voltage regulator is changed along with the magnitude of load current through a current self-adaptive bias circuit; a differential operational amplifier circuit is arranged to increase the loop gain of the linear voltage regulator and improve the precision of the output voltage; a nested inverted voltage follower circuit module is arranged as an output stage of the linear voltage regulator and is used for increasing the loop bandwidth of the linear voltage regulator; the finally obtained linear voltage regulator circuit has the advantages of fast transient response, high power supply rejection ratio, adaptive static power consumption, low load regulation rate, low linear regulation rate and the like, can provide a stable voltage source with the high power supply rejection ratio for an integrated circuit, and improves the performance of an integrated chip.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a fast transient linear voltage regulator circuit with high power supply rejection ratio. Background technique [0002] Low-dropout linear regulator is an important part of modern analog integrated circuits. With the development of smart devices, more and more devices are driven by batteries and work in complex environments. High power supply rejection ratio and fast transient response performance become particularly important. [0003] The power supply rejection ratio, transient response, line regulation rate, load regulation rate, power consumption and other performances of low dropout linear regulators are the main performance indicators. Among them, the Chinese invention patent application with the publication number CN106354186A disclosed a low-dropout linear voltage regulator on January 25, 2017. The disclosed circuit effectively expands the loop bandwidth and improves t...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 李儒国谭洪舟
Owner SUN YAT SEN UNIV
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