The power supply control circuit

PROBLEM TO BE SOLVED: To provide a power supply control circuit which allows for leave alone of longer period, without replenishing the battery capacity.SOLUTION: A power supply control circuit connected with an accumulator battery 1 and a load fed therefrom, and controlling power supply includes operation detection means for detecting the operation condition of the load, a P channel FETu1 for supplying the power of the accumulator battery 1 to the load, an N channel FETu2 for controlling on/off of the P channel FETu1, and a control signal supply circuit 5 for controlling on/off of the N channel FETu2. The control signal supply circuit 5 includes a capacitor c for maintaining a power supply control signal, equal to or higher than the on voltage of the N channel FETu2, at the gate thereof for a set period. The operation detection means supplies a self holding signal, for holding a supply control signal of the on voltage or more at the gate of the N channel FETu2 during operation of the load, once or more during the setting period.SELECTED DRAWING: Figure 1