Patent ID: 8729878

Claim:
A switching regulator control circuit, comprising: an error amplifying circuit for amplifying a difference voltage between a reference voltage and a divided voltage obtained by dividing an output voltage output from a switching regulator; a first triangle wave generation circuit for outputting a first triangle wave; a first comparator for comparing an output voltage of the error amplifying circuit and the first triangle wave; a second triangle wave generation circuit, which has the same circuit structure as the first triangle wave generation circuit, for outputting a second triangle wave having a crest value smaller than a crest value of the first triangle wave; a second comparator for comparing the output voltage of the error amplifying circuit and the second triangle wave; and a determination circuit for detecting an overload state based on an output signal of the second comparator, wherein a difference between the crest value of the first triangle wave and the crest value of the second triangle wave is set based on a characteristic ratio between a device corresponding to the first triangle wave generation circuit and a device corresponding to the second triangle wave generation circuit.