Voltage generation circuit

A technology of voltage generating circuit and voltage dividing circuit, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of increasing costs, small startup faults, etc., to save costs, reduce faults, and improve transient response time Effect

Pending Publication Date: 2021-09-07
迈科微电子(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Capacitor LDO: The external capacitor is generally 1uF or above, the transient response is good, and the startup fault is small, but the output needs to be independently packaged with the PIN pin, and a PCB board-level external capacitor is required, which increases the cost;

Method used

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the protection scope of the present invention.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal" etc. is based on the orientation or positional relationship shown in the drawings, and is only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific o...

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PUM

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Abstract

The invention provides a voltage generation circuit, which comprises an operational amplifier circuit, a compensation network, a driving stage and voltage division circuit and a transient response strengthening capacitor, and is characterized in that the output end of the operational amplifier circuit is connected with the input end of the compensation network, and the output end of the compensation network is connected with the input end of the driving stage and voltage division circuit; the output end of the driving stage and voltage division circuit outputs voltage through an equivalent load resistor and an equivalent load capacitor, and the transient response strengthening capacitor is connected with the operational amplifier circuit and the driving stage and voltage division circuit. The circuit can be compatible with capacitance-free and capacitance-containing applications, that is, the load capacitance is not restrained, and the capacitance-free application can be selected in an occasion where the transient response requirement is not strict, so that the cost is saved; a capacitor can be externally hung in an application occasion with a strict transient response requirement; when a capacitance-free structure is used, a transient response reinforcing circuit is additionally designed, so that the transient response time during capacitance-free application is prolonged; and when no capacitor is applied, faults generated in the starting process are reduced.

Description

technical field [0001] The invention relates to the technical field of power supply circuits, in particular to a voltage generating circuit. Background technique [0002] Power supply is an essential part of electronic products. The types of power supply used in circuit applications are mainly divided into low-dropout linear regulated power supply (LDO) and switching power supply. LDO circuits do not use large-area inductors and have output ripples. Wave small and other characteristics are widely used. According to the classification of load capacitance, LDO can be divided into capacitor LDO and non-capacitor LDO. Their respective characteristics are as follows: [0003] Capacitor LDO: The external capacitor is generally 1uF or above, the transient response is good, and the startup fault is small, but the output needs to be independently packaged with the PIN pin, and a PCB board-level external capacitor is required, which increases the cost; [0004] Capacitorless LDO: no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 邹勇贤
Owner 迈科微电子(深圳)有限公司
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