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Integrated circuit, low-dropout linear voltage-regulator circuit and control method thereof

A low-dropout linear, voltage-stabilizing circuit technology, applied in control/regulating systems, regulating electrical variables, instruments, etc., can solve problems such as ensuring high current efficiency

Pending Publication Date: 2019-10-25
SHENZHEN RENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this application is to provide an integrated circuit, a low-dropout linear voltage regulator circuit and its control method, aiming to solve the problem that the traditional low-dropout linear voltage regulator circuit cannot ensure high current efficiency within a wide dynamic range of driving current

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  • Integrated circuit, low-dropout linear voltage-regulator circuit and control method thereof
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  • Integrated circuit, low-dropout linear voltage-regulator circuit and control method thereof

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[0042] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0043] see figure 1 , the low-dropout linear voltage regulator circuit that can be integrated in an integrated circuit provided by an embodiment of the present application includes a power supply terminal VCC, a common potential terminal VSS, an output terminal V LDO , a reference circuit 100 , a voltage control loop 200 , a drive current control branch 300 and a load current control branch 400 .

[0044] The power supply terminal VCC is used to connect to the power supply, the common potential terminal VSS is used to connect the common potential, such as the earth, and t...

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Abstract

Provided in the invention is a low-dropout linear voltage-regulator circuit comprising a reference circuit, a voltage control loop, a drive current control branch, and a load current control branch. The reference circuit generates a reference current and a reference voltage; the reference voltage is connected to the voltage control loop to generate a low-dropout linear output voltage and a drive current; and the drive current control branch and the load current control branch are controlled to keep the high current efficiency of the low-dropout linear voltage-regulator circuit in a wide drivecurrent range.

Description

technical field [0001] The application belongs to the technical field of CMOS integrated circuit design, and in particular relates to an integrated circuit, a low-dropout linear regulator circuit and a control method thereof. Background technique [0002] No matter whether portable electronic equipment is powered by rectified AC mains or by battery packs, the power supply voltage will vary in a wide range during the working process. The output voltage of various rectifiers is not only affected by the change of mains voltage, but also by the change of load. In order to ensure a stable power supply voltage, almost all electronic equipment is powered by a voltage regulator. Small precision electronic equipment also requires a very clean power supply, so as not to affect the normal operation of electronic equipment. In order to meet the requirements of precision electronic equipment, a low dropout linear regulator circuit (Low Dropout Regulator, LDO) should be added to the inp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 张凡元许志玲许建超陈世超夏书香
Owner SHENZHEN RENERGY TECH