Energy Harvester Powered On-chip Reconfigurable Switched Capacitor Converter in 0.18 μm CMOS

This work proposes a novel reconfigurable switched capacitor (SC) converter on an energy harvester (EH) in 0.18 μm CMOS. The energy harvester supplies input voltage to voltage regulator of the power management unit (PMU). A voltage monitor monitors the steady output voltage from the voltage regulator based on a Start/Stop trigger. A DC-DC SC converter array is employed that derives multiple voltages from a single power source. A reconfigurable SC converter is implemented, capable of operating as either a 2:1 or a 3:1 converter, depending on the need, while consuming 838 nW, shown to have an advantage over standalone SC converters.