Efficient Power Management Circuit: Thermal Energy Harvesting to Above-IC Microbattery Energy Storage

Abstract

An autonomous power generator unit includes 2 micropower sources and their associated management IC; a 1V miniature thermogenerator and RF power receiver are combined with a micropower DC-DC upconverter, power supply manager and microbattery charger, and a 5nW discharge monitor, to manage and store the harvested energy in a 30mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> above-IC deposited microbattery.