SWITCHING REGULATOR AND ELECTRONIC DEVICE

摘要

Provided is a switching regulator which includes a current protection circuit which is automatically returned from an overcurrent state. The switching regulator includes an error amplification circuit which amplifies a difference between a reference voltage and a feedback voltage based on an output voltage and outputs the amplified difference, a PWM comparator which compares the output of the error amplification circuit with an output of a triangular wave oscillation circuit and controls an output transistor, an overcurrent detection circuit which monitors a load current flowing through a load connected to an output terminal, detects that the load current is an overcurrent, and outputs an overcurrent detection signal for stopping a switching operation, and a negative feedback control circuit which receives the overcurrent detection signal and controls the load current to a predetermined current value.