DC power supply and integrated circuit device

Details DC power supply and integrated circuit device DC power supply and integrated circuit device

2006-10-03

2008-12-23

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S283000, C323S285000

Reexamination Certificate

active

07468599

ABSTRACT:
A DC power supply capable of obviating undue resetting and malfunction of CPU, immediately after starting the operation of a switching regulator, by inputting sleep signals input asynchronously during a switching cycle of the switching regulator. In the DC power supply adapted to apply a DC voltage to an output terminal by selectively switching between a first voltage from a switching regulator and a second voltage, the switching regulator includes a first switching element and a inductor serially connected between an input terminal for receiving an input voltage and an output terminal, and a second switching element for use in synchronous rectification between the first switching element and the ground, together with a first drive circuit for driving the first switching element, a second drive circuit for driving the second switching element, and a control circuit for controlling the first and second drive circuits. The control circuit is configured to control signals to the first and second drive circuits such that the second switching element is kept turned off until the first switching element is turned on when the operation of the switching regulator is initiated.

REFERENCES:
patent: 5627460 (1997-05-01), Bazinet et al.
patent: 6396252 (2002-05-01), Culpepper et al.
patent: 6674272 (2004-01-01), Hwang
patent: 6914419 (2005-07-01), Katayama
patent: 6917189 (2005-07-01), Takemura et al.
patent: 2003-216247 (2003-07-01), None

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