Switching regulator

Details Switching regulator Switching regulator

2010-12-21

2011-10-18

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

Reexamination Certificate

active

08040121

ABSTRACT:
A switching regulator is configured to generate an output voltage by stepping down an input voltage by switching control of a switching element. The switching regulator includes a first comparator configured to compare a feedback voltage of the output voltage and a target voltage; a second comparator configured to compare magnitude of a current flowing through the switching element and a predetermined value; an on-time timer configured to measure fixed on-time for on-control of the switching element; an off-time timer configured to measure fixed off-time for off-control of the switching element; and a control circuit configured to perform the on-control of the switching element with the fixed on-time in accordance with an output of the first comparator, and the off-control of the switching element with the fixed off-time in accordance with an output of the second comparator.

REFERENCES:
patent: 6300810 (2001-10-01), Hardee
patent: 6369555 (2002-04-01), Rincon-Mora
patent: 7202642 (2007-04-01), Chen et al.
patent: 7482793 (2009-01-01), Stoichita
patent: 7764057 (2010-07-01), Groom
patent: 2009/0160414 (2009-06-01), Hachiya et al.
patent: 2003-111400 (2003-04-01), None
patent: 2008-92740 (2008-04-01), None

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