Invention Grant
US08981746B2 Enhanced efficiency low-dropout linear regulator and corresponding method
有权
增强效率低压差线性稳压器及相应的方法
- Patent Title: Enhanced efficiency low-dropout linear regulator and corresponding method
- Patent Title (中): 增强效率低压差线性稳压器及相应的方法
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Application No.: US13420883Application Date: 2012-03-15
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Publication No.: US08981746B2Publication Date: 2015-03-17
- Inventor: Karel Napravnik
- Applicant: Karel Napravnik
- Applicant Address: CZ Prague
- Assignee: STMicroelectronics Design and Application S.R.O.
- Current Assignee: STMicroelectronics Design and Application S.R.O.
- Current Assignee Address: CZ Prague
- Agency: Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
- Priority: ITTO2008A0933 20081215
- Main IPC: G05F1/40
- IPC: G05F1/40 ; G05F1/575

Abstract:
A low-dropout linear regulator includes an error amplifier which includes a cascaded arrangement of a differential amplifier and a gain stage. The gain stage includes a transistor driven by the differential amplifier to produce at a drive signal for an output stage of the regulator. The transistor is interposed over its source-drain line between a first resistive load included in a RC network creating a zero in the open loop gain of the regulator, and a second resistive load to produce a drive signal for the output stage of the regulator. The second resistive load is a non-linear compensation element to render current consumption linearly proportional to the load current to the regulator. The first resistive load is a non-linear element causing the frequency of said zero created by the RC network to decrease as the load current of the regulator decreases.
Public/Granted literature
- US20120181998A1 ENHANCED EFFICIENCY LOW-DROPOUT LINEAR REGULATOR AND CORRESPONDING METHOD Public/Granted day:2012-07-19
Information query
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