Patent ID: 8901902

Claim:
A switching regulator to convert an input voltage into a predetermined output voltage, the switching regulator comprising: an input terminal to which the input voltage is input; an output terminal to which the output voltage is output; a first switching element connected between the input terminal and the output terminal; a second switching element connected between the output terminal and ground; a switching-time control circuit to generate a first switching-time control signal indicating finish timing of an ON-period of the first switching element when a first time period, corresponding to a ratio of a length of the ON-period of the first switching element to a sum of lengths of ON-periods of the first switching element and the second switching element, has elapsed from respective reset-release timings; a first comparator to compare a feedback voltage corresponding to the output voltage with a predetermined first reference voltage, and generate a second switching-time control signal indicating finish timing of the ON-period of the second switching element when the feedback voltage is smaller than the first reference voltage; and a switching-element control circuit to control on/off operation of the first switching element and the second switching element so that the first switching element is turned off and the second switching element is turned on in response to the first switching-time control signal, and the second switching element is turned off and the first switching element is turned on in response to the second switching-time control signal, wherein the reset-release timing is designated as a starting point for counting the first time period and a second time period that is longer than the first time period, and the switching-time control circuit generates reset signals when the second time period has elapsed from the rest-release timing.