Patent ID: 8324872

Claim:
A voltage regulator for generating an output voltage from an input voltage, comprising: at least one coupled inductor including a first winding and a second winding each having a polarity, the first winding and the second winding connected in series to form a common node and such that the first winding and the second winding have the same polarity, the first winding and the second winding having a coefficient of coupling greater than or equal to 0.99; a conduction switch having an on-state and an off-state, to controllably conduct the input voltage to the at least one coupled inductor at a switching frequency; and a freewheeling switch having an on-state and an off-state, in communication with the common node of the at least one coupled inductor to provide a path for current when the conduction switch is in the off-state, wherein the first winding has a number of turns N1, the second winding has a number of turns N2 and a turns ratio N1/N2 is at least two.