US Patent 11482933 Switching power supply device

There is provided a switching power supply device, including: an output stage circuit including an output transistor installed between an application end of an input voltage and an application end of an output voltage, and configured to generate the output voltage from the input voltage through a switching operation including an operation of switching the output transistor; and a main control circuit configured to execute PWM control for causing the output stage circuit to perform the switching operation at a predetermined PWM frequency based on a feedback voltage according to the output voltage.