发明授权
- 专利标题： Regulator circuit having over-current protection
- 专利标题（中）： 稳压电路具有过流保护功能
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申请号： US12113496申请日： 2008-05-01
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公开(公告)号： US07923978B2公开(公告)日： 2011-04-12
- 发明人: Shinji Kawashima , Kazunori Doi
- 申请人： Shinji Kawashima , Kazunori Doi
- 申请人地址： JP Kanagawa
- 专利权人： Renesas Electronics Corporation
- 当前专利权人： Renesas Electronics Corporation
- 当前专利权人地址： JP Kanagawa
- 代理机构： Young & Thompson
- 优先权： JP2007-121030 20070501
- 主分类号： G05F1/573
- IPC分类号： G05F1/573
摘要：
A stabilized regulator circuit is provided A first Pch transistor (PTr) (P1) whose source is connected to a power supply line and whose drain is connected to an output terminal that outputs a load current, a PTr (P2) whose source and gate are respectively connected to the source and gate of the PTr (P1), resistor elements connected in series between the output terminal and ground, a resistor element (R3) connected between a drain of P2 and ground, and an amplifier which controls P1 and P2 based on a difference between potential of a connection point of the resistor elements and a reference. A comparator, with a differential amplifier input stage configured by an Nch transistor, compares potential difference between two ends of R3 and potential difference between the connection point of the resistor elements and ground, and when the former is larger, controls P1 so as to limit load current.
公开/授权文献
- US20080272753A1 REGULATOR CIRCUIT 公开/授权日：2008-11-06
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