Patent ID: 8018218

Claim:
A PWM controller for a DC-DC converter, wherein the DC-DC converter converts an input voltage into an output voltage and comprises an output inductor coupled between an output of the DC-DC converter and a phase node, comprising: a first sense circuit for sensing a signal from the phase node to generate a first signal corresponding to the input voltage; a second sense circuit for sensing the signal from the phase node to generate a second signal corresponding to the output voltage; and a PWM generator for controlling a first transistor and a second transistor of the DC-DC converter according to the first and second signals, wherein the first transistor of the DC-DC converter is coupled between the input voltage and the phase node, and the second transistor of the DC-DC converter is coupled between the phase node and a ground, and wherein the first sense circuit senses the signal from the phase node when the first transistor is turned on.