A DC-DC converter having a first and a second switch, an input diode, a magnetizing inductor, a resonant capacitor, a resonant inductor, an output diode and an output filter capacitor. The first and second switches are turned on alternatively. When the first switch is turned on, an input voltage is coupled to an anode of the input diode that has a cathode coupled to a first terminal of the magnetizing inductor. The second switch is designed to short a second terminal of the magnetizing inductor to a ground. The resonant capacitor and inductor, which are coupled in series, are disposed between the second terminal of the magnetizing inductor and the ground. A connection node between the resonant capacitor and inductor is coupled to the output filter capacitor, via the output diode, to regulate a voltage of the output filter capacitor. The regulated voltage is used in powering a load.