SWITCHING REGULATOR AND METHOD OF CONTROLLING THE SAME

摘要

A disclosed switching regulator converts an input voltage to an output voltage of a predetermined level and outputs the output voltage. The disclosed switching regulator includes a switching transistor configured to be turned on and off according to a control signal; an inductor configured to be charged by the input voltage when the switching transistor is turned on; a mode switching circuit configured to generate a switching signal for switching a control mode of the switching transistor between a PWM control mode and a VFM control mode; and a control circuit configured to control the switching transistor in the PWM control mode or the VFM control mode depending on the switching signal from the mode switching circuit so that the output voltage is maintained at the predetermined level.