公开(公告)号：US20170212539A1

公开(公告)日：2017-07-27

申请号：US15327916

申请日：2015-08-18

Applicant: CSMC TECHNOLOGIES FAB1 CO., LTD.

Inventor： Nan ZHANG ,  Jing ZHOU

IPC: G05F1/46 ,  G05F1/575 ,  G05F1/56

CPC classification number: G05F1/468 ,  G05F1/56 ,  G05F1/575

Abstract: A low dropout linear regulator circuit comprises a voltage reference source module (100), an error amplifier (200), a reference voltage determining module (300), a power transmission device (400) and a feedback module (500); wherein the voltage reference source module (100) provides a reference voltage for the error amplifier (200), the reference voltage determining module (300) controls an enablement of the error amplifier (200) according to whether the voltage reference source module (100) is completely started, the error amplifier (200) controls ON/OFF of the power transmission device (400) according to the reference voltage provided by the voltage reference source module (100) and a feedback voltage provided by the feedback module (500). A chip having the above low dropout linear regulator circuit and a electronic device having the above chip are provided.