LOW DROPOUT LINEAR VOLTAGE REGULATOR CIRCUIT AND DEVICE

WIPO Patent Application WO/2021/077846

A1

A low dropout linear voltage regulator circuit and a device. The circuit comprises a fast path and a slow path; the fast path consists of a load transistor (Mpass), a seventh transistor (M7) and a sixth transistor (M6), and the slow path consists of a load transistor (Mpass), a first transistor (M1), a fifth transistor (M5) and a seventh transistor (M7); and the fast path is used to increase the loop bandwidth, and the slow path is used to increase the DC accuracy. A second capacitor (C2) and a third capacitor (C3) in the circuit can sense a load change, correspondingly increase or decrease a current flowing through a fourteenth transistor (M14) and a third transistor (M3) by means of capacitive coupling, accelerate a loop response speed by increasing a charging and discharging speed of a gate capacitor of a load transistor (Mpass), and reduce an overshoot value of an output voltage.

WANG YUBO (CN)
TANG XIAOKE (CN)
HU YI (CN)
GAN JIE (CN)
LIU XING (CN)
FENG WENNAN (CN)
FENG XI (CN)
LI ZHENGUO (CN)
MA YONGWANG (CN)

PCT/CN2020/106877

April 29, 2021

August 04, 2020

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BEIJING SMARTCHIP MICROELECTRONICS TECH CO LTD (CN)
STATE GRID INFORMATION & TELECOMMUNICATION GROUP CO LTD (CN)
STATE GRID CORP CHINA (CN)

G05F1/56

CN110632970A	2019-12-31
CN107479610A	2017-12-15
CN108803761A	2018-11-13
CN204102018U	2015-01-14
CN107102671A	2017-08-29
CN104199504A	2014-12-10
CN104536506A	2015-04-22
CN107656568A	2018-02-02
CN108427468A	2018-08-21
CN108710401A	2018-10-26
JP2012043085A	2012-03-01

CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)

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