Patent ID: 8269471

Claim:
A method for DC/DC conversion, comprising the steps of: controlling a first switch for coupling a supply terminal to a first terminal of an inductor; controlling a second switch for coupling the first terminal of the inductor to a ground potential terminal; controlling a third switch for coupling a second terminal of the inductor to the ground potential terminal; controlling a fourth switch for coupling the second terminal of the inductor to an output terminal; and performing a control sequence which comprises four switching phases, wherein the first switch is in a closed switching position during a first, second and third switching phase and in an open switching position during a fourth switching phase, the second switch is in a closed switching position during the fourth switching phase and in an open switching position during the first, second and third switching phase, the third switch is in a closed switching position during the second switching phase and in an open switching position during the first, third and fourth switching phase, and the fourth switch is in a closed switching position during the first, third and fourth switching phase and in an open switching position during the second switching phase, wherein the first switching phase has a predetermined duration set by a first delay circuit, and the third switching phase has a further predetermined duration set by a second delay circuit.