Invention Grant
- Patent Title: Power supply circuit, power supply control circuit, and power supply control method
- Patent Title (中): 电源电路，电源控制电路和电源控制方式
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Application No.: US11976507Application Date: 2007-10-25
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Publication No.: US07683598B2Publication Date: 2010-03-23
- Inventor: Toshiyuki Hayakawa
- Applicant: Toshiyuki Hayakawa
- Applicant Address: JP Yokohama
- Assignee: Fujitsu Microelectronics Limited
- Current Assignee: Fujitsu Microelectronics Limited
- Current Assignee Address: JP Yokohama
- Agency: Arent Fox LLP
- Priority: JP2006-294392 20061030
- Main IPC: G05F1/40
- IPC: G05F1/40
Abstract:
A DC-DC converter and first and second bypass switch circuits are provided in parallel between an input pin and first and second output pins and operate in accordance with a combination of the voltage value of the input pin and the voltage value required for the first output pin. A start control circuit causes the DC-DC converter to operate unconditionally in a step-down mode during the period from when the DC-DC converter is started until the output voltage of the DC-DC converter becomes equal to the voltage of the input pin. An output slope control circuit synchronizes rising slopes of the output voltages of the first and second bypass switch circuits with a rising slope of the output voltage of the DC-DC converter.
Public/Granted literature
- US20080100274A1 Power supply circuit, power supply control circuit, and power supply control method Public/Granted day:2008-05-01
Information query
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