Invention Grant
US08436664B2 Circuit and method for implementing power good and chip enable control by a multi-functional pin of an integrated circuit
失效
用于通过集成电路的多功能引脚实现电源良好和芯片使能控制的电路和方法
- Patent Title: Circuit and method for implementing power good and chip enable control by a multi-functional pin of an integrated circuit
- Patent Title (中): 用于通过集成电路的多功能引脚实现电源良好和芯片使能控制的电路和方法
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Application No.: US13287828Application Date: 2011-11-02
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Publication No.: US08436664B2Publication Date: 2013-05-07
- Inventor: Jo-Yu Wang , Isaac Y. Chen
- Applicant: Jo-Yu Wang , Isaac Y. Chen
- Applicant Address: TW Chupei, Hsinchu
- Assignee: Richtek Technology Corp.
- Current Assignee: Richtek Technology Corp.
- Current Assignee Address: TW Chupei, Hsinchu
- Agency: Muncy, Geissler, Olds & Lowe, PLLC
- Priority: TW99138309A 20101108
- Main IPC: H03L7/00
- IPC: H03L7/00
Abstract:
A first switch is switched to short a multi-functional pin of an integrated circuit to a ground terminal or let a current supplied to the multi-functional pin to flow to a second switch connected to the multi-functional pin. Before the integrated circuit is ready, the second switch is closed circuit and is detected its current to determine a first signal to enable or disable the integrated circuit. After the integrated circuit is ready, the second switch is open circuit, the voltage at the multi-functional pin is detected to determine a second signal to enable or disable the integrated circuit, and when the voltage at the multi-functional pin is higher than a threshold, a power good signal is triggered.
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