A single-ended primary-inductor converter (SEPIC) may include, but is not limited to: a first switch connected to a first circuit node; a first capacitor and a second switch connected in series between the first circuit node and a second circuit node; an inductor connected to the first circuit node and the second circuit node; at least one of a third switch and a passive diode rectifier connected between the second circuit node and a third circuit node; and at least one second capacitor and at least one load connected in parallel to the third circuit node.