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Quick transient response CMOS (Complementary Metal Oxide Semiconductor) low-dropout regulator

A low-dropout linear and transient response technology, applied in the power supply field, can solve the problems of low-dropout linear voltage regulator load transient response rate, etc., to achieve the effect of accelerating charge and discharge speed, small voltage drop, and good transient response

Active Publication Date: 2015-06-03
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of low load transient response rate of the existing low dropout linear voltage regulator, and a fast transient response CMOS low dropout linear voltage regulator is provided, which has a higher slew rate and transient response

Method used

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  • Quick transient response CMOS (Complementary Metal Oxide Semiconductor) low-dropout regulator
  • Quick transient response CMOS (Complementary Metal Oxide Semiconductor) low-dropout regulator

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Embodiment Construction

[0020] A fast transient response CMOS low dropout linear regulator such as figure 1 and 2 As shown, it is mainly composed of an error amplifier circuit, a slew rate enhancement circuit, a power tube, a sampling resistor circuit and a compensation circuit. The inverting input terminal of the error amplifier circuit is connected to the reference voltage Vref, the non-phase input terminal of the error amplifier circuit is connected to the sampling output terminal Vf of the sampling resistor circuit, and the output terminal of the error amplifier circuit is connected to the grid of the power tube through the slew rate enhancement circuit; After the positive terminal of the power supply of the error amplifier circuit, the positive terminal of the power supply of the slew rate enhancement circuit and the source of the power tube are connected to form the input terminal Vin of the regulator body; after the drain of the power tube is connected to the positive terminal of the power sup...

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Abstract

The invention discloses a quick transient response CMOS (Complementary Metal Oxide Semiconductor) low-dropout regulator. The inverted input end of an error amplification circuit is connected with reference voltage Vref, the in-phase input end of the error amplification circuit is connected with the sampling output end Vf of a sampling resistor circuit, and the output end of the error amplification circuit is connected with the gate of a power tube through a conversion rate increasing circuit. The positive power end of the error amplification circuit, the positive power end of the conversion rate increasing circuit and the source of the power tube are connected to form the input end Vin of a regulator body. The drain of the power tube and the positive power end of the sampling resistor circuit are connected to form the output end Vout of the regulator body. The negative power end of the error amplification circuit, the negative power end of the conversion rate increasing circuit and the negative power end of the sampling resistor circuit are connected to form the ground end GND of the regulator body. The quick transient response CMOS low-dropout regulator is higher in conversion rate and quicker in transient response.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to a fast transient response CMOS low-dropout linear voltage regulator. Background technique [0002] With the rapid development of very large scale integrated circuits (VLSI), system on chip (SoC) has attracted more and more attention, especially in terms of power management, which has attracted the attention of researchers and enterprises. In order to be able to manage, regulate, and reduce power supply, a voltage regulator is usually required between the power supply and the electronics. At present, commonly used voltage regulators include low dropout linear regulators (LDOs), switching regulators and power management chips. [0003] Low dropout linear regulators (LDOs) have the ability to provide a wide range of different voltages and currents, and are commonly used to provide regulated power for low-voltage digital circuits. The existing low dropout linear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
Inventor 韦保林李媛媛韦雪明徐卫林段吉海
Owner GUILIN UNIV OF ELECTRONIC TECH
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