Voltage regulator

Abstract

An output voltage of a voltage regulator is set to within a prescribed voltage range in a short time. The voltage regulator comprises: an amplifier (AMP) that amplifies a difference between a reference voltage and a voltage proportional to an output voltage; an NMOS transistor (MN1) that has a control terminal connected to an output terminal of the amplifier (AMP) and that drops a power supply voltage to output an output voltage; a first capacitive element (C1) that has a first terminal connected to the output terminal of the amplifier (AMP) and a second terminal connected to ground; a second capacitive element (C2) that has a first terminal connected to the output terminal of the amplifier (AMP); and a control circuit (11) that, subsequent to supply of the power supply voltage, controls operation activation of the amplifier (AMP) and also supplies a drive signal to a second terminal of the second capacitive element (C2).

Dependencies are inferred from the claim text.