A synchronous rectification switching regulator, and a control circuit and
a control method for controlling the synchronous rectification switching
regulator. The regulator includes an output terminal, a first switching
device, an inductor, a second switching device for synchronous
rectification, a control circuit unit to control switching of the first
switching device and cause the second switching device to perform
switching opposite to that of the first switching device, and a reverse
current detection circuit unit to detect a generation or an indication of
a reverse current flowing from the output terminal to the second
switching device and make the control circuit unit turn off the second
switching device when a generation or an indication of the reverse
current is detected. The reverse current detection circuit unit stops
detecting a generation or an indication of the reverse current while the
second switching device is turned off by the control circuit unit.