Patent ID: 8350532

Claim:
A power management system comprising: a first switch having a first transfer terminal and a first body diode; a second switch having a second transfer terminal and a second body diode; a third switch having a third transfer terminal and a third body diode; a fourth switch coupled to said third switch and having a diode; and a controller coupled to said first, second, third and fourth switches and operable for controlling power conversion by turning on said third and fourth switches alternately, wherein said first, second and third transfer terminals are coupled to a common node, and resistance between said first transfer terminal and said common node, resistance between said second transfer terminal and said common node, and resistance between said third transfer terminal and said common node are substantially equal to zero, and wherein cathodes of said first, second and third body diodes are coupled to said common node, and a cathode of said diode is coupled to an anode of said third body diode.