Patent ID: 7538526

Claim:
A switching regulator for converting an input voltage input through an input terminal to an output voltage output through an output terminal, the switching regulator comprising: a controller circuit configured to detect a current or a voltage in the switching regulator and output a first control signal for controlling a level of the output voltage based on the detected voltage or current; a first switching element connected to the controller circuit and configured to alternately turn on and off according to the first control signal to charge an inductor; a switching circuit connected to the second switching element at a switch node, the switching circuit comprising a second switching element configured to turn on and off according to the first control signal in a reciprocal manner with the first switching element to discharge the inductor; and a reverse current suppressing circuit configured to generate a second control signal indicating whether a reverse current flowing from the output terminal toward the switching circuit is generated or is about to be generated, and to adjust on-resistance of the switching circuit based on the second control signal.