SWITCHING REGULATOR
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United States of America Patent
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Issued Date -
Mar 13, 2014
app pub date -
Sep 11, 2013
filing date -
Sep 13, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A switching regulator includes a coil, switching transistor, a synchronous rectifying transistor, a switching control circuit, a comparator, a first buffer circuit operated by an input voltage, and a second buffer circuit operated by an output voltage. The switching control circuit assumes control such that control signals are outputted from the first buffer circuit to a switching transistor and a synchronous rectifying transistor, respectively, in response to a power supply switching signal indicating that the output voltage is lower than the input voltage, while the switching control circuit assumes control such that the control signals are outputted from the second buffer circuit to the switching transistor and the synchronous rectifying transistor, respectively, in response to the power supply switching signal indicating that the output voltage is equal to or higher than the input voltage.
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