Switching regulator

Details Switching regulator Switching regulator

2011-04-19

2011-04-19

Laxton, Gary L. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S284000, C323S901000

Reexamination Certificate

active

07928715

ABSTRACT:
Provided is a switching regulator which is capable of reducing soft start time when being activated, and prolonging battery life. The switching regulator has a configuration in which a clamp circuit for clamping a reference voltage is provided in a soft start circuit, and a predetermined period of time since the switching regulator has been activated is divided into a plurality of segments to increase the reference voltage with different slopes for each of the plurality of segments. At an early stage of the activation, the reference voltage is set to be low for preventing an inrush current from a power source, and thereafter, a rate of increase in reference voltage is gradually increased, to thereby reduce the soft start time.

REFERENCES:
patent: 6954056 (2005-10-01), Hoshino et al.
patent: 7719249 (2010-05-01), Matyas et al.
patent: 2009/0278521 (2009-11-01), Omi et al.
patent: 2010/0052640 (2010-03-01), Ryoo
patent: 2007-159316 (2007-06-01), None

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