Fully Integrated 98mV Start Up DC-DC Converter for Energy Harvesting in Batteryless IoT/Wearable Devices

Tabrizi, Hamed Osouli
Jayaweera, H. M. P. C.
Muhtaroglu, Ali
Energy harvesting is an important pillar for large scale exploitation of IoT smart nodes and wearable devices. To this end, DC-DC converters with ultra-low start-up voltage, full integration and high efficiency in a wide input voltage range are required. In this paper a novel one-input, two-output DC-DC converter circuit is introduced. Low-power output provides 0.8-3.5 V with maximum load current of 3.5 mu A starting up from 98 mV input. High-power output is turned on by an ultra-low-power voltage detector when input voltage reaches 150 mV, to provide 0.8-2.4 V with maximum load current of 200 mu A. The circuit has been implemented in UMC 180-nm CMOS technology. Maximum simulated system efficiency is 34% at 0.2 V input. Low-power output meets the real time power demand of sensing, data processing and data storage blocks of IoT/Wearable devices, while high-power output provides sufficient power for data transmission, enabling batteryless operation.


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Citation Formats
H. O. Tabrizi, H. M. P. C. Jayaweera, and A. Muhtaroglu, “Fully Integrated 98mV Start Up DC-DC Converter for Energy Harvesting in Batteryless IoT/Wearable Devices,” 2017, p. 264, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66738.