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A low dropout linear regulator circuit

A low-dropout linear, voltage-stabilizing circuit technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as complex LDO structures, and achieve the effect of easy integration and simple feedback structure

Inactive Publication Date: 2018-01-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the structure of the existing LDO is relatively complex, and propose a low-dropout linear voltage regulator circuit that is easy to integrate on-chip

Method used

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  • A low dropout linear regulator circuit
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  • A low dropout linear regulator circuit

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] figure 2 Shown is a schematic diagram of the LDO structure of the present invention.

[0023] The working principle of the present invention is:

[0024] When the enable end EN is abnormal (that is, the enable end is at a low level), the first PMOS transistor MP1 is turned on, so that the second PMOS transistor MP2 is turned off, and a low level signal is output.

[0025] When the enable terminal EN is normal (that is, the enable terminal is at a high level), the current I1 flowing through the first NMOS transistor MN1, the second NMOS transistor MN2 and the third NMOS transistor MN3 will be mirrored to the sixth NMOS transistor MN6 generates current I4 and the eleventh NMOS transistor MN11 generates current I2, since the width-to-length ratio of the sixth NMOS transistor MN6 is twice that of the third NMOS transistor MN3, so

[0026]

[0027] Current I...

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Abstract

The invention belongs to the technical field of integrated circuits, and particularly relates to a low-dropout linear voltage regulating circuit. Compared with the common LDO, the low-dropout linear voltage regulating circuit adopts a negative feedback loop consisting of a second PMOS tube MP2, a fourth NMOS tube MN4, a fifth NMOS tube MN5, a seventh NMOS tube MN7 and an eighth NMOS tube MN8, so that a feedback structure is simple and integration is easy.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a low-dropout linear voltage stabilizing circuit. Background technique [0002] With the advancement of science and the development of human society, energy issues have become increasingly prominent. How to better manage energy has gradually become a hot topic in society. In the field of integrated circuit power management, LDO (that is, low-dropout linear regulator) is widely used because of its advantages such as higher conversion efficiency, lower cost and simpler circuit structure. Traditional LDOs (such as figure 1 As shown) the structure includes the operational amplifier structure, which makes the circuit more complex in structure. Therefore, the LDO circuit with a simpler structure and easier integration has gradually attracted attention. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 方健陈智昕刘振国冯磊王科竣方舟胡梦莹林巨征张波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA