Invention Grant
- Patent Title: Low dropout linear regulator and voltage stabilizing method therefor
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Application No.: US16628011Application Date: 2019-06-12
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Publication No.: US11061422B2Publication Date: 2021-07-13
- Inventor: Ning Jin
- Applicant: Chipone Technology (Beijing) Co., Ltd.
- Applicant Address: CN Beijing
- Assignee: Chipone Technology (Beijing) Co., Ltd.
- Current Assignee: Chipone Technology (Beijing) Co., Ltd.
- Current Assignee Address: CN Beijing
- Agency: Treasure IP Group, LLC
- Priority: CN201810664170.8 20180625
- International Application: PCT/CN2019/090849 WO 20190612
- International Announcement: WO2020/001271 WO 20200102
- Main IPC: G05F1/575
- IPC: G05F1/575 ; G05F1/59

Abstract:
Disclosed is a low dropout linear regulator and a voltage stabilizing method therefor in embodiments. The low dropout linear regulator includes: a drive circuit, generating a first control signal according to a voltage reference and a feedback voltage and generating an output current according to the first control signal, a load capacitor providing an output voltage according to the output current; a voltage feedback circuit, obtaining the feedback voltage according to the output voltage; a current feedback circuit, generating a second control signal according to the output current; a switch circuit, providing the voltage reference according to the second control signal. Among them, in a first phase of a startup process, the voltage reference is less than or equal to an initial value, and the current feedback circuit limits the output current according to the second control signal; in a second phase of the startup process, the switch circuit switches a voltage value of the voltage reference to a target value. The low dropout linear regulator and the voltage stabilizing method therefor of the embodiment of the disclosure, during the startup process, may effectively limit the output current and make the output voltage rise gently so as to reduce or avoid overshoot.
Public/Granted literature
- US20210026384A1 LOW DROPOUT LINEAR REGULATOR AND VOLTAGE STABILIZING METHOD THEREFOR Public/Granted day:2021-01-28
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