Patent ID: 6984967

Claim:
A method of controlling a switching regulator to supply a regulated output voltage at an output node, the switching regulator comprising an inductor having first and second terminals, a first switch coupled between an input voltage and the first terminal of the inductor, a second switch coupled between the first terminal of the inductor and a first reference voltage, a third switch coupled between the second terminal of the inductor and the output node, and a fourth switch coupled between the second terminal of the inductor and a second reference voltage, the method comprising: generating a feedback signal proportional to the regulated output voltage of switching regulator; generating first, second, third and fourth control signals to control the first, second, third, and fourth switches, respectively, in response to the feedback signal and to provide a first state in which the first and third switches are closed and the second and fourth switches are open, a second state in which the second and third switches are closed and the first and fourth switches are open, and a third state in which the first and fourth switches are closed and the second and third switches are open; and adjusting, in a first mode of operation, a number of state transitions from the first state to the second state relative to a number of state transitions from the first state to the third state in response to the feedback signal.