SWITCHING POWER SUPPLY CIRCUIT

摘要

A switching power supply circuit using a clock signal (11) includes a comparison circuit (120) and an operation control circuit (130). The comparison circuit operates intermittently in response to an operation control signal (15). The comparison circuit compares a feedback voltage based on the output voltage (12) with a reference voltage (13) to generate a comparison result signal (14) representing a result of comparison. The operation control circuit generates the operation control signal based on the clock signal (11) and the comparison result signal (14). The operation control circuit generates an operation control signal (15) synchronous with the clock signal (11), if the comparison result signal is at the first level.