Patent ID: 7750609

Claim:
An output device integrated into an integrated circuit, the output device comprising: an input terminal to receive an input voltage applied via an inductor; an output terminal to feed an output voltage to a load; an output transistor connected between the input terminal and a predetermined standard voltage node; a first transistor connected between the input terminal and the output terminal; a second transistor connected between the output terminal and a backgate of the first transistor; and switching control circuitry to control switching of the output transistor, the first transistor, and the second transistor, wherein, the output device is operable so that when the input voltage is stepped up to generate the output voltage, the switching control circuitry controls switching of the output transistor and the first transistor complementarily to each other, while keeping the second transistor on, and wherein when operation of the device is stopped, the switching control circuitry turns off the output transistor, the first transistor, and the second transistor.