A Reconfigurable Switched Capacitor DC–DC Converter With 1.9–6.3-V Input Voltage Range and 85% Peak Efficiency in 28-nm CMOS

A reconfigurable step-down switched capacitor dc–dc converter (SCC) capable of operating over a wide input voltage range from 1.9 to 6.3 V is presented in this letter. The converter can be reconfigured in five different topologies, obtaining five different voltage conversion ratios, with a minimum overhead in terms of extra switches and flying capacitors. Prototypes implemented in a 28-nm CMOS tec...