Power supply control circuit

A power supply control circuit connected to and controlling a system power supply IC, the system power supply IC having a plurality of power supply circuits and being capable of outputting a plurality of power supply voltages, and the system power supply IC activating the plurality of power supply circuits at one time using a common enable signal,

• the power supply control circuit comprising:
• a gate circuit generating the common enable signal to be transmitted to the system power supply IC based on a control signal and a selection signal, wherein the control signal is output from a control device that controls the system power supply IC during a usual operation, and the selection signal is a signal that selects one of the plurality of power supply circuits which is required to output the power supply voltage;
• and
• a first switch unit driven by a power-on signal during a system activation, wherein the first switch unit switches on or switches off the selection signal input to the gate circuit.