Patent attributes
A switching regulator includes: an error amplification circuit configured to amplify a difference between a voltage based on the output voltage and a first reference voltage to output an error voltage; a PFM comparison circuit configured to compare the error voltage with a second reference voltage to output a comparison result signal at a first level or a second level, an offset being given to the error voltage for a given period in response to a change of the comparison result signal from the second level to the first level; an oscillation circuit configured to output a clock signal of a given frequency according to the first level of the comparison result signal, and to stop outputting the clock signal according to the second level of the comparison result signal; and a PWM conversion circuit configured to turn the switching element on at a prescribed pulse width.
