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Low dropout regulator

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: 2017-12-29
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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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 invention discloses a low dropout stabilizer. The low dropout stabilizer comprises an amplifying unit, a transistor, a feedback unit and a compensation unit. The amplifying unit is provided with a first input end, a second input end and an output shaft, the first input end receives reference voltage, the second input end receives feedback voltage, and the output end is connected with a first node; the transistor is provided with a control end, a first end and a second end, the control end is connected with the first node, the first end is connected with a first power source potential, and the second end is connected with a second node and provides output voltage; the feedback unit is connected with the second node and provides feedback voltage according to the output voltage; the compensation unit comprises one or more of a first compensation amplifier, a second compensation amplifier and a first variable current source. In the technical scheme, the compensation unit is used for detecting and restraining surges generated when light and heavy load switching occurs in 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 Applications(China)
IPC IPC(8): G05F3/26
CPCG05F3/262G05F1/575H03F3/45183H03F2203/45674H03F3/45071H03F2200/504
Inventor 刘哲诚
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD