Low dropout regulator, power supply system and electronic equipment

A low-dropout linear regulator technology, applied in control/regulation systems, instruments, regulating electrical variables, etc., can solve problems affecting the performance of low-dropout linear regulators

Active Publication Date: 2021-09-07
CHENGDU AMBIT TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal oxide semiconductor field effect transistors often have five types of noise, including shot noise, thermal noise, flicker noise, pulse noise and avalanche noise. Large noise, therefore, can seriously affect the operating performance of the low dropout linear regulator

Method used

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  • Low dropout regulator, power supply system and electronic equipment
  • Low dropout regulator, power supply system and electronic equipment
  • Low dropout regulator, power supply system and electronic equipment

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Embodiment Construction

[0058] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. In addition, it should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not need to be further defined and defined in subsequent figures. Explanation.

[0059] see figure 1 , the embodiment of the present application provides a low dropout linear regulator (Low Drop Output, LDO) 10 , including an operational amplifier AMP, a power transistor unit 100 , a resistance feedback unit 200 and a compensation structure 300 .

[0060] Wherein, the inverting terminal of the operational amplifier AMP is connected to the reference reference voltage Vref, the non-inverting terminal of the operationa...

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Abstract

The invention relates to the technical field of power supply management, in particular to a low dropout linear regulator, a power supply system and electronic equipment. The low dropout linear regulator provided by the embodiment of the invention comprises an operational amplifier, a power tube unit, a resistance feedback unit and a compensation structure, a reference voltage is connected to the anti-phase end of the operational amplifier, and the in-phase end of the operational amplifier is connected with the output end of the resistance feedback unit; the output end of the operational amplifier is connected with the control end of the power tube unit, the first end of the power tube unit is connected with a first power supply voltage, the second end of the power tube unit is connected with the input end of the resistance feedback unit and serves as the output end of the low dropout linear regulator, and one end of the compensation structure is connected with the input end of the resistance feedback unit; the other end of the compensation structure is connected with the output end of the resistance feedback unit, and the compensation structure comprises a capacitance compensation network. According to the low dropout linear regulator, a power supply system and the electronic equipment provided by the embodiment of the invention, flicker noise generated by a circuit can be suppressed.

Description

technical field [0001] The present application relates to the technical field of power management, in particular to a low-dropout linear voltage regulator, a power system and electronic equipment. Background technique [0002] Low-dropout linear regulator is an important circuit structure in the field of power management technology, which has the advantages of low cost, simple structure, and low power consumption. In terms of composition and structure, a low-dropout linear regulator usually includes a metal-oxide-semiconductor field-effect transistor as a power tube unit. However, metal oxide semiconductor field effect transistors often have five types of noise, including shot noise, thermal noise, flicker noise, pulse noise and avalanche noise. Large noise, therefore, can seriously affect the performance of the low dropout linear regulator. Contents of the invention [0003] The purpose of the present application is to provide a low dropout linear voltage regulator, a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 周彬
Owner CHENGDU AMBIT TECH CO LTD
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