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A reliable model to analyze the dynamic behavior of two-phase switched-capacitor dc–dc converters in the slow-switching limit regime is proposed, taking into account both top and bottom parasitic capacitances as well as the charge reusing approach. This technique features significant improvements in both gain and efficiency with respect to existing solutions. We calculate the slow-switching limit...
This paper exploits a new charge pump used in integrated solar energy harvesting systems to improve the power efficiency under ultra low supply of under 0.7 V supplied by on-chip photodiodes. Compared with conventional charge pumps, improvements of 20% in terms of output voltage gain and conversion efficiency can be achieved by using two symmetrical branches and PMOSFET-only transfer transistors per...
A micro power management system is presented for solar energy harvesting applications. An inductor-less solution is proposed which facilitates on-chip integration of the system. We target at applications working in different lighting environments ranging from strong sunlight to dim indoor lighting where the output voltage from the photovoltaic (PV) cells is low. A charge pump is used to step the PV...
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