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Low Dropout Linear Regulators

A low-dropout linear and voltage-stabilizer technology, applied in the field of circuits, can solve problems such as surge generation and system instability

Active Publication Date: 2018-10-30
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the switching process, a surge is likely to occur. If the surge is too strong, it may cause the entire system to become unstable.

Method used

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  • Low Dropout Linear Regulators
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Examples

Experimental program
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Embodiment Construction

[0032] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments. communicated to those skilled in the art. In the drawings, the same reference numerals denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0033] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practi...

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Abstract

The present application discloses a low dropout linear regulator, comprising: an amplifying unit having a first input terminal, a second input terminal and an output terminal, the first input terminal of which receives a reference voltage, and the second input terminal of which receives a feedback voltage, Its output terminal is connected to the first node; the output transistor has a control terminal, a first terminal and a second terminal, its control terminal is connected to the first node, its first terminal is connected to the first power supply potential, and its second terminal is connected to the second node and provide an output voltage; a feedback unit, connected to the second node, provides the feedback voltage according to the output voltage; a compensation unit, including at least one of the first compensation amplifier, the second compensation amplifier and the first variable current source A sort of. According to the technical solution of the present invention, the compensation unit is used to detect and suppress the surge generated when the light-to-heavy load is switched at the second node.

Description

technical field [0001] The present disclosure relates to the field of circuit technology, in particular, to a low dropout linear voltage regulator. Background technique [0002] Along with the rapid development of mobile communication technology, various mobile terminals such as mobile phones, palmtop computers, notebook computers, etc. have gradually been popularized. Along with the diversification of functions, various power levels are required, and power management becomes extremely important. For example, an excellent mobile terminal will not use multiple sets of power supplies because of its powerful functions. One solution is to use a low dropout linear regulator (LDO for short) to generate voltages corresponding to various functional applications inside the mobile terminal. Various sub-power sources, so low-dropout linear regulators are widely used in various mobile terminal products powered by batteries. [0003] figure 1 Shown is a schematic diagram of a low drop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F3/26
CPCG05F3/262G05F1/575H03F3/45183H03F2203/45674H03F3/45071H03F2200/504
Inventor 刘哲诚
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD