公开(公告)号：US09952609B2

公开(公告)日：2018-04-24

申请号：US15327916

申请日：2015-08-18

申请人： CSMC TECHNOLOGIES FAB1 CO., LTD.

发明人： Nan Zhang ,  Jing Zhou

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

CPC分类号： G05F1/468 ,  G05F1/56 ,  G05F1/575

摘要： 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.