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Low Dropout Shunt Regulator

A voltage stabilizer, low-dropout technology, applied in instruments, control/regulating systems, regulating electrical variables, etc., can solve the problems of not having high output impedance and increasing energy consumption, reducing internal energy consumption and reducing current. effect of change

Active Publication Date: 2020-09-25
LITE ON SINGAPORE PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, because the range of the input voltage is quite large, the low-dropout linear regulator needs to provide a stable output current. When the input voltage is a high voltage, since the general low-dropout linear regulator mainly uses the current mirror circuit as the current source, while the traditional current mirror switch component does not have a high output impedance, relatively, the energy consumed inside it will also increase

Method used

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  • Low Dropout Shunt Regulator
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Embodiment Construction

[0024] Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like numbers indicate like components throughout.

[0025] It will be understood that although the terms first, second, third etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Thus, a first component discussed below could be termed a second compon...

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Abstract

The invention provides a low-dropout shunt voltage stabilizer. The low-dropout shunt voltage stabilizer comprises a first current mirror module, a second current mirror module and an output module. The first end of the first current mirror module is electrically connected with an input voltage; the first current mirror module has high output impedance; the first end of the second current mirror module is electrically connected with the second end of the first current mirror module; the second end of the second current mirror module is electrically connected with a reference voltage; the outputend of the output module is electrically connected with the third end of the first current mirror module; the output end and the first end of the output module are electrically connected with the second current mirror module; and the second end of the output module is electrically connected with the reference voltage. According to the low-dropout shunt voltage stabilizer, a current mirror circuitwith high output impedance is formed by combining a low-voltage switch assembly and a high-voltage switch assembly, so that the current change caused by the large-amplitude input voltage range can bereduced, and the internal energy consumption of the low-dropout shunt voltage stabilizer can be reduced.

Description

technical field [0001] The invention relates to a low-drop shunt regulator, in particular to a low-drop shunt regulator with low current change rate in the input voltage range. Background technique [0002] In the voltage stabilizing circuit, the low-dropout linear regulator is a circuit that provides stable voltage and current, and can receive a wide range of input voltages, such as 5V to 30V. [0003] However, because the range of the input voltage is quite large, the low-dropout linear regulator needs to provide a stable output current. When the input voltage is a high voltage, because the general low-dropout linear regulator mainly uses the current mirror circuit as the current Source, while the traditional current mirror switch component does not have a high output impedance, relatively, the energy consumed inside it will also increase. [0004] Therefore, providing a voltage regulator with a high output impedance current source is an important subject in the industry....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 陈明东林惠祯王又法
Owner LITE ON SINGAPORE PTE LTD
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