SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

A reduction in current consumption by a step-up voltage generating circuit of a semiconductor integrated circuit during a standby time. The semiconductor integrated circuit comprises a pump circuit which generates a step-up voltage by stepping up an external source voltage and a detection circuit which detects the step-up voltage generated by the pump voltage to control drive/non-drive of the pump circuit. The detection circuit comprises a differential amplifier which compares the step-up voltage with a reference voltage, and a current control circuit which controls the amount of bias current flowing through the differential amplifier depending upon whether the pump circuit is driven or not driven.