Abstract
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 technology can deliver up to 0.45-W output power while regulating the output voltage to 0.9 V with a 85% peak efficiency.
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