Abstract: A control circuit for a DC-DC converter includes: an output control circuit configured to control an output voltage of a DC-DC converter according to a reference voltage; a reference control circuit configured to control the reference voltage according to an open-circuit voltage of an external power supply coupled to the DC-DC converter; a limiting circuit configured to limit a current flowing from DC-DC converter to an external load; and a stopping control circuit configured to stop operation of the limiting circuit until the reference voltage reaches a given value.

Abstract: A switching regulator has an output circuit having first and second transistors and a connection node thereof as an output terminal; a switching control unit generating a first and second switching pulses for alternately switching the first and second transistors according to the load; and a first comparator monitoring an output voltage, and generating a pulse stopping control signal for stopping the generation of the switching pulses when the output voltage rises, and for generating the switching pulses when the output voltage drops. And the switching control unit performs a stopping operation for stopping the switching pulse generation and a switching operation for generating the switching pulse in response to the pulse stopping control signal, and outputs, to the first comparator, a timing control signal for quickening a switching timing from the stopping operation to the switching operation as the load of the load circuit increases.

Abstract: A control circuit for a DC-DC converter includes: an output control circuit configured to control an output voltage of a DC-DC converter according to a reference voltage; a reference control circuit configured to control the reference voltage according to an open-circuit voltage of an external power supply coupled to the DC-DC converter; a limiting circuit configured to limit a current flowing from DC-DC converter to an external load; and a stopping control circuit configured to stop operation of the limiting circuit until the reference voltage reaches a given value.

Abstract: A switching regulator has an output circuit having first and second transistors and a connection node thereof as an output terminal; a switching control unit generating a first and second switching pulses for alternately switching the first and second transistors according to the load; and a first comparator monitoring an output voltage, and generating a pulse stopping control signal for stopping the generation of the switching pulses when the output voltage rises, and for generating the switching pulses when the output voltage drops. And the switching control unit performs a stopping operation for stopping the switching pulse generation and a switching operation for generating the switching pulse in response to the pulse stopping control signal, and outputs, to the first comparator, a timing control signal for quickening a switching timing from the stopping operation to the switching operation as the load of the load circuit increases.