Step-down switching regulator
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United States of America Patent
Stats
-
Jan 23, 2007
Grant Date -
Sep 21, 2006
app pub date -
Mar 16, 2006
filing date -
Mar 17, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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