Invention Grant
US09465394B2 Low-drop regulator apparatus and buffer stage circuit having higher voltage transition rate
有权
具有较高电压转换速率的低压调节器装置和缓冲级电路
- Patent Title: Low-drop regulator apparatus and buffer stage circuit having higher voltage transition rate
- Patent Title (中): 具有较高电压转换速率的低压调节器装置和缓冲级电路
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Application No.: US14210307Application Date: 2014-03-13
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Publication No.: US09465394B2Publication Date: 2016-10-11
- Inventor: Chiao-Hsing Wang
- Applicant: Silicon Motion Inc.
- Applicant Address: TW Hsinchu County
- Assignee: Silicon Motion Inc.
- Current Assignee: Silicon Motion Inc.
- Current Assignee Address: TW Hsinchu County
- Agent Winston Hsu; Scott Margo
- Priority: TW102136060A 20131004
- Main IPC: G05F1/00
- IPC: G05F1/00 ; G05F1/56 ; G05F1/575
Abstract:
A low-drop regulator (LDO) apparatus includes an operational amplifier, a buffer stage circuit, and a power transistor. The operational amplifier is used for receiving a reference voltage and a feedback voltage to generate a first voltage. The buffer stage circuit is coupled to the power transistor and the operational amplifier and used for buffering the first voltage to generate a second voltage. The power transistor is coupled to the buffer stage circuit and used for generating an output voltage according to the second voltage wherein the output voltage is proportional to the feedback voltage. In addition, the buffer stage circuit is arranged to determine whether to mirror and generate a mirrored current according to the first voltage and to generate the second voltage for providing the second voltage to the power transistor to control on/off state of the power transistor when the mirrored current is generated.
Public/Granted literature
- US20150097540A1 LOW-DROP REGULATOR APPARATUS AND BUFFER STAGE CIRCUIT HAVING HIGHER VOLTAGE TRANSITION RATE Public/Granted day:2015-04-09
Information query
IPC分类:
