Batteryless DC-DC Boost Converter for Thermoelectric Energy Harvesting Devices

A batteryless DC-DC boost converter with low startup voltage for thermoelectric energy harvesting applications is implemented in a TSMC 0.18μm CMOS process. A LC oscillator enables the converter to operate from a 200-m V input voltage. A high duty cycle controls the switching frequency of the pulse frequency modulation (PFM) boost converter to lower its switching loss, with output voltage regulated at 1.1V and peak efficiency of 63%.