A switching regulator and method of fabricating a switching regulator is disclosed. In one embodiment a switching regulator comprises a transformer having a primary winding and a secondary winding, an inductor (L) connected to an input of the primary winding, and a capacitor (C) connected across the primary winding of the transformer. The inductor and capacitor form a L-C tank circuit. The switching regulator also includes a frequency source connected to the inductor, wherein the frequency source provides a switching frequency to the inductor that is substantially equal to a resonant frequency of the L-C tank circuit.