Patent ID: 8742743

Claim:
A switching control circuit configured to control a switching operation of a transistor to generate an output voltage of a target level from an input voltage, the transistor having an input electrode applied with the input voltage and an output electrode connected to a load via an inductor, the switching control circuit comprising: a voltage generating circuit configured to generate a slope voltage based on the output voltage in each of a switching period of the transistor, the slope voltage changing with a slope corresponding to the output voltage; an adding circuit configured to add the slope voltage to a reference voltage or a feedback voltage, the reference voltage indicating a reference of the output voltage of the target level, the feedback voltage corresponding to the output voltage; and a drive circuit configured to perform the switching operation of the transistor, when a level of either one voltage, added with the slope voltage, of the reference voltage and the feedback voltage reaches a level of an other voltage thereof; wherein the voltage generating circuit is configured to generate, as the slope voltage, a voltage changing with a slope corresponding to a difference between the input voltage and the output voltage, based on the input voltage and the output voltage, in each of the switching period.