Step-down switching regulator

Details Step-down switching regulator Step-down switching regulator

2008-04-01

2008-04-01

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

Reexamination Certificate

active

11634711

ABSTRACT:
A step-down switching regulator is disclosed that includes a first switching element, a smoothing circuit part including an inductor and a second switching element for synchronous rectification, a switching controller circuit part, and a reverse current detector circuit part that detects a reverse current flowing from the inductor to the second switching element and interrupts the reverse current by causing the switching controller circuit part to turn off the second switching element upon detection of the reverse current. Detecting a change in a set voltage, the reverse current detector circuit part stops, for a predetermined period of time, the operation of causing the switching controller circuit part to turn off the second switching element due to detection of the reverse current, and after the predetermined period of time is over, causes the switching controller circuit part to turn off the second switching element upon detection of the reverse current.

REFERENCES:
patent: 5847554 (1998-12-01), Wilcox et al.
patent: 6456050 (2002-09-01), Agiman
patent: 6580258 (2003-06-01), Wilcox et al.
patent: 6870354 (2005-03-01), Nishimaki
patent: 7166993 (2007-01-01), Shimizu et al.
patent: 2006/0164057 (2006-07-01), Kudo et al.
patent: 3561876 (2004-06-01), None

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