Low dropout regulator

An error amplifier and MOS tube technology, applied in the field of electronics, can solve the problems such as the inability to meet the voltage regulation requirements of low dropout voltage regulators and the single working mode

Active Publication Date: 2021-07-16
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the related art, the low dropout voltage regulator provided has a single working mode, which cannot meet the voltage regulation requirements of the low dropout voltage regulator in different states of the equipment.

Method used

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Examples

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Embodiment Construction

[0044] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0045] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0046] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific implementation manners. It will be understood by those skilled in the art that the present disclosure may be practiced without some of the specific details. In some instances, methods, means, componen...

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Abstract

The present disclosure relates to a low dropout voltage stabilizing device. The device includes: a mode adjustment module Mode Sel, an error amplifier A1, a gain amplifier Gm2, a first switch k1, a first capacitor C1, a first resistor R1, a first MOS transistor MOS1, a second switch k2, a second MOS transistor MOS2, The second resistor R2 and the third resistor R3, the working mode of the device includes a normal working mode and a sleep working mode. The low dropout voltage stabilizing device provided by the embodiment of the present disclosure has a normal working mode and a dormant working mode, which can meet the requirements of different working states of the equipment installed with the device, and its normal working mode can meet the voltage requirements of the equipment in the normal working state. Stability requirements, its sleep mode can meet the voltage stability requirements of the device in the low power consumption state.

Description

technical field [0001] The disclosure relates to the field of electronic technology, in particular to a low dropout voltage stabilizing device. Background technique [0002] A low-dropout regulator (LDO for short), also known as a low-dropout linear regulator or a low-dropout regulator, is a type of linear DC voltage regulator used to provide a stable DC voltage power supply. Compared with general linear DC regulators, low dropout regulators can work with a smaller output-input voltage difference. In the related art, the low dropout voltage regulator provided has a single working mode, which cannot meet the voltage regulation requirements of the low dropout voltage regulator in different states of the equipment. Contents of the invention [0003] In view of this, the present disclosure proposes a low dropout voltage stabilizing device to meet the voltage stabilization requirements of the low dropout voltage regulator in different states of the equipment. [0004] Accordi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/565
CPCG05F1/565
Inventor 柯可人
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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