LDO circuit, control method, chip and electronic equipment

A circuit and control module technology, applied in the electronic field, can solve problems affecting normal operation, affecting LDO transient response, etc., to achieve fast response and reduce power consumption

Active Publication Date: 2022-06-21
CHIPSEA TECH SHENZHEN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes a certain amount of time for the overshoot or undershoot to return to a stable value, which affects the transient response of the LDO, which in turn affects the normal operation of the module powered by the LDO output voltage

Method used

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  • LDO circuit, control method, chip and electronic equipment
  • LDO circuit, control method, chip and electronic equipment
  • LDO circuit, control method, chip and electronic equipment

Examples

Experimental program
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Embodiment Construction

[0059] A control module (corresponding to the above-mentioned first control module) may be composed of a comparator circuit COMP1 (corresponding to the above-mentioned first comparison module) and a low-pass filter Filter1 (corresponding to the above-mentioned first filtering module). The noninverting input terminal of the comparator circuit COMP1 is used to receive the feedback voltage, the inverting input terminal is used to receive the first threshold signal, and the output terminal can be connected to the first terminal of the resistor R. The second end of the resistor R is connected to the first end of the capacitor C, and the second end of the capacitor C is grounded. The second terminal of the resistor R (or the first terminal of the capacitor C) can be used as the output terminal of the control module for outputting the Control_N signal. Wherein, when the output voltage does not overshoot, the first threshold signal is a preset high level or low level, and the Control_...

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PUM

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Abstract

The invention provides an LDO circuit, a control method, a chip and electronic equipment, and belongs to the technical field of electronics. The LDO circuit comprises a voltage regulation module and a control module. The control module is configured to generate an overshoot adjusting signal changing along with the amplitude of the output voltage when the output voltage of the LDO circuit generates overshoot; and / or when the output voltage of the LDO circuit generates undershoot, an undershoot adjusting signal changing along with the amplitude of the output voltage is generated; the voltage regulation module is configured to reduce the load current of the LDO circuit based on the overshoot regulation signal; and / or increasing the load current of the LDO circuit based on the undershoot adjusting signal. By adopting the LDO circuit, quick response to overshoot or undershoot can be realized, and meanwhile, the power consumption of the LDO circuit is reduced.

Description

technical field [0001] The present application relates to the field of electronic technology, in particular to an LDO circuit, a control method, a chip and electronic equipment. Background technique [0002] LDO (Low-Dropout Regulator, low-dropout linear regulator) circuit is widely used in different electronic devices due to its simple circuit, small size, low power consumption, and low cost to provide power for its internal modules. [0003] When the output voltage of the LDO circuit is stable, as the load current changes, such as switching from heavy load to light load, or from light load to heavy load, the output voltage of the LDO will change suddenly, resulting in overshoot or undershoot . It takes a certain amount of time for the overshoot or undershoot to return to a stable value, which affects the transient response of the LDO, which in turn affects the normal operation of modules powered by the output voltage of the LDO. Contents of the invention [0004] In or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/561Y02B70/10
Inventor 殷文杰陈敏
Owner CHIPSEA TECH SHENZHEN CO LTD
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