Patent ID: 7535210

Claim:
A synchronous DC-to-DC converter comprising: an inductor having a first terminal coupled to receive an input voltage; a first transistor having a first electrode coupled to a second electrode coupled to a second terminal of the inductor; a second transistor having a first electrode coupled to an output conductor to produce an output voltage and having a second electrode coupled to the second electrode of the first transistor; a feedback circuit coupled between the output conductor and the first reference voltage for producing a feedback voltage representative of a value of the output voltage; and a predictive duty cycle controller that receives the input voltage, a reference voltage, and the feedback voltage, wherein the predictive circuit provides control signals to control electrodes of the first transistor and the second transistor, and wherein the predictive duty cycle controller includes: a resistive network that receives the input voltage and the reference voltage; an amplifier having a plurality of inputs, wherein each input is coupled to the resistive network; and a first comparator that compares an output of the amplifier to a ramp voltage.