Patent ID: 7372241

Claim:
A circuit for synchronously-rectified switching regulation, comprising: a regulator controller that is arranged to provide a first switch control signal to a first switch, and to provide a second switch control signal to a synchronous switch, such that the first and second switch control signals are based in part on a capacitor voltage and an output voltage, and such that the regulator controller is operable to control a synchronous switching voltage regulation to convert an input voltage into the output voltage; a current sense circuit that is operable to sense a current across the synchronous switch, and to provide a current sense voltage at a current sense node based on the sensed current; another switch that is coupled between the current sense node and a capacitor node, wherein said another switch is operable to close if the synchronous switch is closed, and to open if the synchronous switch is open; and a capacitor that is coupled to the capacitor node, wherein the capacitor voltage is provided by the capacitor at the capacitor node.