5μW-to-10mW input power range inductive boost converter for indoor photovoltaic energy harvesting with integrated maximum power point tracking algorithm

This self-contained and fully autonomous converter features an input power range spanning from 5μW up to 10mW while consuming very little power. A comparison with state-of-the-art publications is shown. The method used for MPPT is generic for energy source with one global maximum on their power curves. It is thus possible to use it with TEG and RF harvesters provided their output voltages fall within the input range. The presented circuit is fabricated in a commercial TSMC 0.25μm CMOS process with 5 metal layers and uses one compact SMD inductor of 1 mH. A die photo is shown.