An apparatus comprising: a switched-capacitor converter including a first flying capacitor (C res1) and a second flying capacitor (C res2); a multi-tapped autotransformer including a first primary winding, a second primary winding and a secondary winding, wherein the first and second flying capacitors (C res1, C res2) of the switched-capacitor converter are controllably switched in circuit paths including the first primary winding and the second primary winding; and an output stage coupled to receive energy from a combination of the first primary winding and the second primary winding of the multi-tapped autotransformer, the output stage operable to produce an output voltage (V OUT) to power a load, wherein the switched-capacitor converter includes a first switch and a second switch connected in series between a supply voltage source and a first circuit node, a third switch and a fourth switch connected in series between the supply voltage source and a second circuit node, a fifth switch connected between the first circuit node and a ground and a sixth switch connected between the second circuit node and the ground, wherein the first flying capacitor (C res1) is connected in series with the second primary winding and the second flying capacitor (C res2) is connected in series with the first primary winding, and wherein the first primary winding and the second primary winding are connected in series through the secondary winding such that the first primary winding and the secondary winding are connected at the first circuit node and the second primary winding and the secondary winding are connected at the second circuit node, characterised in that the first flying capacitor (C res1) is connected to a circuit node between the first switch and the second switch and the second flying capacitor (C res2) is connected to a circuit node between the third switch and the fourth switch. a switched-capacitor converter including a first flying capacitor (C res1) and a second flying capacitor (C res2); a multi-tapped autotransformer including a first primary winding, a second primary winding and a secondary winding, wherein the first and second flying capacitors (C res1, C res2) of the switched-capacitor converter are controllably switched in circuit paths including the first primary winding and the second primary winding; and an output stage coupled to receive energy from a combination of the first primary winding and the second primary winding of the multi-tapped autotransformer, the output stage operable to produce an output voltage (V OUT) to power a load, wherein the switched-capacitor converter includes a first switch and a second switch connected in series between a supply voltage source and a first circuit node, a third switch and a fourth switch connected in series between the supply voltage source and a second circuit node, a fifth switch connected between the first circuit node and a ground and a sixth switch connected between the second circuit node and the ground, wherein the first flying capacitor (C res1) is connected in series with the second primary winding and the second flying capacitor (C res2) is connected in series with the first primary winding, and wherein the first primary winding and the second primary winding are connected in series through the secondary winding such that the first primary winding and the secondary winding are connected at the first circuit node and the second primary winding and the secondary winding are connected at the second circuit node, characterised in that the first flying capacitor (C res1) is connected to a circuit node between the first switch and the second switch and the second flying capacitor (C res2) is connected to a circuit node between the third switch and the fourth switch.