Patent ID: 7936160

Claim:
A circuit for current mode switching regulation, comprising: a valley current mode switching regulator controller that is arranged to provide a first switch control signal to a main switch based, in part, on a capacitor voltage and an output voltage, wherein the valley current mode switching regulator controller includes: a current sense circuit that is arranged to sense a current across the main switch, and to provide a current sense voltage at a current sense node based on the sensed current; a sampling switch that is coupled between the current sense node and a capacitor node, wherein the sampling switch is arranged to close if the main switch is closed, and to open if the main switch is open; and a capacitor that is coupled to the capacitor node, wherein the capacitor is arranged to provide the capacitor voltage at the capacitor node, wherein the valley current mode switching regulator controller is further arranged to provide a synchronous switch control signal to a synchronous switch based, in part, on the first switch control signal, wherein the valley current mode switching regulator controller is a buck valley current mode switching regulator controller, the main switch is a high-side switch, and wherein the synchronous switch is a low-side switch.