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Low dropout regulator

A technology of low-dropout voltage stabilization and voltage source, which is applied in the direction of instruments, control/regulation systems, and regulation of electrical variables. It can solve the problems of large circuit area and high circuit complexity, and achieve the effect of small circuit area and simple circuit area.

Active Publication Date: 2021-04-02
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the current low-dropout voltage regulators often operate in a phase-operated manner, the complexity of the circuit is high and the circuit area is large, which is not conducive to the application in small electronic devices.

Method used

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Embodiment Construction

[0025] In order to make the purpose, technical solution and advantages of this patent application clearer, the patent 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 patent application, and are not intended to limit the present patent application.

[0026] Please refer to figure 1 , figure 1 It is a schematic diagram of a low dropout voltage stabilizing device 10 of some embodiments of the present patent application. The low dropout voltage regulator 10 includes a voltage source module 102 , an amplifier 104 , a control unit 106 , an output transistor module 108 and a resistor circuit 110 . The voltage source module 102 includes multiple reference voltage sources. In this embodiment, the voltage source module 102 generates reference voltage signals VREF1 and VREF2 according to the reference voltage sour...

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Abstract

A low dropout voltage stabilising apparatus (10), comprising: a control unit (106), comprising a control circuit (112) and a switch module (114), and used for controlling the connection of the switch module (114) on the basis of a plurality of control signals (SG1-SG6) of the control circuit (112); and an output transistor module (108) coupled to the control unit (106), the output transistor module (108) comprising a first transistor unit (M1) and a second transistor unit (M2), and being used for providing an output current (IL) to an output end on the basis of the connection of the switch module (114); on the basis of the connection state of the switch module (114) controlled by the control circuit (112), a power-down mode, a soft-start mode, and a normal start mode provide an output current (IL) of a different current amount to the output end. The present low dropout voltage stabilising apparatus has the advantages of continuous and stable output of voltage to a post-stage circuit, and a small and simple circuit.

Description

technical field [0001] This patent application relates to a low dropout voltage stabilizing device, in particular to a low dropout voltage stabilizing device which can provide stable voltage with a simple circuit. Background technique [0002] With the development and progress of science and technology, mobile electronic devices such as mobile phones, digital cameras, tablet computers, and notebook computers have become indispensable tools in people's lives. In order to save the power consumption of electronic devices, linear regulators with the ability to provide stable output voltage are widely used in various portable electronic products, among which, due to the low dropout linear regulator (Low Drop-Out Voltage Regulator, LDO Regulator) The output voltage can be very close to the input voltage and widely used. However, because the current low dropout voltage stabilizing device usually operates in a phase operation mode, resulting in high circuit complexity and large cir...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 庄朝贵杨富强
Owner SHENZHEN GOODIX TECH CO LTD
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