Patent ID: 8519692

Claim:
A voltage regulator comprising: an amplifier that amplifies a difference between a reference voltage and a voltage proportional to an output voltage; an output MOS transistor that has a control terminal connected to an output terminal of said amplifier and that drops a power supply voltage to output an output voltage; a first capacitive element that has a first terminal connected to said output terminal of said amplifier and a second terminal connected to ground or an output terminal of said output MOS transistor; a second capacitive element that has a first terminal connected to said output terminal of said amplifier; a control circuit that, subsequent to supply of said power supply voltage, controls operation activation of said amplifier and also supplies a drive signal to a second terminal of said second capacitive element; and i-th capacitive element(s) (i=3 to n, with n being an integer of at least 3) having a first terminal connected to an output terminal of said amplifier; wherein said control circuit, after operation activation of said amplifier, supplies drive signals, each of different timing, to a second to n-th of said capacitive elements, respectively.