A DC-to-DC power converter includes at least one power switch, a pulse width modulation circuit, an output inductor and a current sensor for sensing current passing through the inductor. The current sensor preferably includes a resistor and a capacitor connected together in series. The output inductor has an inductance and a direct current (DC) resistance defining a first time constant. In one embodiment, the resistor and capacitor of the current sensor define a second time constant within a predetermined range of each other. In another embodiment, the resistor and capacitor of the current sensor define a second time constant substantially equal to the first time constant.