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Low-dropout linear voltage stabilizing circuit and electronic equipment

A low-dropout linear, voltage-stabilizing circuit technology, applied in the direction of regulating electrical variables, instruments, control/regulating systems, etc. Transient response characteristics, effect of holding output voltage

Pending Publication Date: 2022-07-15
GUANGDONG GREATER BAY AREA INST OF INTEGRATED CIRCUIT & SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of this application is to provide a low-dropout linear voltage regulator circuit and electronic equipment to solve the problem of excessive overshoot or undershoot voltage of low-dropout linear voltage regulators in the prior art

Method used

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  • Low-dropout linear voltage stabilizing circuit and electronic equipment
  • Low-dropout linear voltage stabilizing circuit and electronic equipment
  • Low-dropout linear voltage stabilizing circuit and electronic equipment

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Embodiment Construction

[0023] It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0024] In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only The embodiments are part of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

[0025] It s...

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Abstract

The invention provides a low-dropout linear voltage stabilizing circuit and electronic equipment, the circuit comprises a feedback unit and a transient response unit, the feedback unit comprises a power transistor and a load module, the power transistor is electrically connected with the load module, and the feedback unit adjusts the output voltage of the feedback unit by adjusting the current flowing through the power transistor; the output end of the transient response unit is electrically connected with the power transistor, the voltage of the power transistor is changed when the current of the load module is subjected to step-type jump, and the transient response unit adjusts the output voltage of the feedback unit under the condition that the voltage of the power transistor is changed, so that the output voltage of the load module is adjusted. The low dropout linear voltage regulator solves the problem of overlarge overshoot or undershoot voltage of a low dropout linear voltage regulator in the prior art, effectively improves the transient response characteristic of the low dropout linear voltage regulator circuit, reduces output voltage overshoot or undershoot caused by load abrupt change or power supply voltage abrupt change, and keeps the output voltage stable.

Description

technical field [0001] The present application relates to the technical field of low-dropout linear voltage regulators, and in particular, to a low-dropout linear voltage regulator circuit and electronic equipment. Background technique [0002] The low-dropout linear regulator uses the error amplifier and the negative feedback loop in the system to adjust the sampling voltage of the sampling network to make it equal to the reference voltage, thereby realizing a circuit that forms an output voltage that is a multiple of the reference voltage. The advantages are low cost, simple circuit structure, no inductance, on-chip integration, no switching noise, good power supply ripple suppression, conversion efficiency independent of load, and extremely low static power consumption. Although the low-dropout linear regulator has the disadvantage that it can only achieve step-down, and the efficiency is low when the pressure difference is large, due to its simple circuit structure, low ...

Claims

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Application Information

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IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 张建华刘云涛王云薛静任广辉郝炳贤梁福焕马玫娟李荣荣陆超郑凯华
Owner GUANGDONG GREATER BAY AREA INST OF INTEGRATED CIRCUIT & SYST
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