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An ldo circuit without external capacitor and power management system

A power management system, no off-chip capacitor technology, applied in the direction of data processing power supply, electrical digital data processing, control/regulation system, etc., can solve the problem of unable to stably adjust the output voltage of the power management system

Active Publication Date: 2021-07-06
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the application provides a LDO circuit without an off-chip capacitor and a power management system, which solves the technical problem that the existing LDO circuit without an off-chip capacitor cannot stably adjust the output voltage of the power management system when the load current is low

Method used

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  • An ldo circuit without external capacitor and power management system
  • An ldo circuit without external capacitor and power management system

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Embodiment Construction

[0025] The embodiment of the present application provides an LDO circuit without an off-chip capacitor and a power management system, which solves the technical problem that the existing LDO circuit without an off-chip capacitor cannot stably adjust the output voltage of the power management system when the load current is low.

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Sensible heat, the described embodiment It is only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0027] First of...

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Abstract

The application discloses a non-chip capacitor LDO circuit and a power management system, wherein the chip-free capacitor LDO circuit includes: a load current detection module, a comparator module and an error amplifier module; the load current detection module is used to detect the The load current of the load; the comparator module and the error amplifier module are connected to the output terminal of the load current detection module, so that when the load current is less than the preset low load current threshold, the output voltage of the power management system is adjusted by the comparator module; when When the load current is greater than the preset low load current threshold, the output voltage of the power management system is adjusted by the error amplifier module, which solves the problem that the existing LDO circuit without off-chip capacitor cannot stably adjust the output voltage of the power management system when the load current is low technical problem.

Description

technical field [0001] The present application relates to the technical field of power management, in particular to an LDO circuit without an off-chip capacitor and a power management system. Background technique [0002] With the development of science and technology, electronic devices such as smartphones and wearable devices have appeared one after another. However, the components in the existing electronic equipment are complex, including the central processing unit (CPU), chipset, image chip and memory, etc. Based on the purpose of power saving, these components need to provide different efficiencies according to different situations, that is to say, these Components may be in different states such as sleep, low speed operation and high speed operation. Therefore, it is very important to study the power management system. [0003] LDO (low dropout regulator) without off-chip capacitor, as an important part of the power management system, has been widely used in the ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/59G06F1/30
CPCG05F1/59G06F1/305
Inventor 周枫杰李思臻余凯章国豪林宇星
Owner GUANGDONG UNIV OF TECH
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