An apparatus comprising: a power converter comprising an input port (Vin) and an output port (Vo), the power converter comprising a first switching capacitor network, a second switching capacitor network (12D; 12B), and a regulating circuit coupled in series, wherein the regulating circuit is connected between an output of the first switching capacitor network and an input of the second switching capacitor network (12D; 12B); the first switching capacitor network comprising a first capacitor and a plurality of switches (1,2) coupled to the first capacitor; the second switching capacitor network comprising a second capacitor, a third capacitor, and a first and a second groups of switches (7,8) in complementary states, and control means configured to control the first and the second groups of switches to switch between a first switch configuration and a second switch configuration to respectively provide at least a first conductive path and a second conductive path within the power converter for respective flows of current through the first conductive path or the second conductive path, the control means being configured to close the first group of switches for charging the third capacitor while discharging the second capacitor, and to close the second group of switches for having a complementary effect; and the regulating circuit comprising switches (3, 4) in complementary states and an inductor interconnected with the second capacitor via respective switches from the first and the second groups of switches, the switches being configured to alternately form the first or the second conductive path during operation of the power converter, and to alternately couple the inductor to the first switching capacitor network or the second switching capacitor network, the switches being further configured to alternately form the first conductive path or the second conductive path to change an amount of charge stored in the second capacitor, wherein the first switching capacitor network is a two-phase step-up series-parallel switched capacitor converter with a conversion ratio of 2:1, the regulating circuit is a synchronous buck/boost converter, and the second switching capacitor network is a two-phase step-up series-parallel switched capacitor converter with a conversion ratio of 2:1; wherein the first switching capacitor network further comprises a fourth capacitor, and the plurality of switches in the first switching capacitor network comprises a third and a fourth group of switches (1,2) in complementary states, and the control means being further configured to close the third group of switches for charging the first capacitor while discharging the fourth capacitor, and to close the fourth group of switches for having a complementary effect. a power converter comprising an input port (Vin) and an output port (Vo), the power converter comprising a first switching capacitor network, a second switching capacitor network (12D; 12B), and a regulating circuit coupled in series, wherein the regulating circuit is connected between an output of the first switching capacitor network and an input of the second switching capacitor network (12D; 12B); the first switching capacitor network comprising a first capacitor and a plurality of switches (1,2) coupled to the first capacitor; the second switching capacitor network comprising a second capacitor, a third capacitor, and a first and a second groups of switches (7,8) in complementary states, and control means configured to control the first and the second groups of switches to switch between a first switch configuration and a second switch configuration to respectively provide at least a first conductive path and a second conductive path within the power converter for respective flows of current through the first conductive path or the second conductive path, the control means being configured to close the first group of switches for charging the third capacitor while discharging the second capacitor, and to close the second group of switches for having a complementary effect; and the regulating circuit comprising switches (3, 4) in complementary states and an inductor interconnected with the second capacitor via respective switches from the first and the second groups of switches, the switches being configured to alternately form the first or the second conductive path during operation of the power converter, and to alternately couple the inductor to the first switching capacitor network or the second switching capacitor network, the switches being further configured to alternately form the first conductive path or the second conductive path to change an amount of charge stored in the second capacitor, wherein the first switching capacitor network is a two-phase step-up series-parallel switched capacitor converter with a conversion ratio of 2:1, the regulating circuit is a synchronous buck/boost converter, and the second switching capacitor network is a two-phase step-up series-parallel switched capacitor converter with a conversion ratio of 2:1; wherein the first switching capacitor network further comprises a fourth capacitor, and the plurality of switches in the first switching capacitor network comprises a third and a fourth group of switches (1,2) in complementary states, and the control means being further configured to close the third group of switches for charging the first capacitor while discharging the fourth capacitor, and to close the fourth group of switches for having a complementary effect.