A 70mV Input Bulk Switching Inductive-Load Ring Oscillator Based Start up Circuit for Thermal Energy Harvested DC-DC Boost Converter with 69% Efficiency

Authors

  • Maliha Naaz, Kaleem Fatima, B. Rajendra Naik

Keywords:

DC-DC Boost Converter, bulk switching ILRO-Inductive load ring oscillator, CP-Charge pump, duty cycle generator.

Abstract

An ultra low voltage startup for DC-DC boost converter for portable applications is presented in this work. This work makes use of proposed bulk switching Inductive-load ring oscillator (ILRO) to generate high amplitude signals at voltages as low as 70 mV without use of off chip inductor. The proposed circuit serves as part of auxiliary DC converter for the Thermo Electric Generator based DC-DC converter.  The output of proposed ILRO drives the 6-Stages of charge pump. The output of charge pump is used as supply for the control circuits in the boost converter. The complete design is implemented in 180nm CMOS technology using Cadence Virtuoso. The proposed work shows better performance in terms of low operating input voltage, boosted output voltage and efficiency. The TEG input voltage is 70mV and the output boosted voltage achieved is 1V with a conversion efficiency of 69% and output power of 65µW. There are no external off-chip components used in the design of start-up circuit.

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Published

12.06.2024

How to Cite

Maliha Naaz. (2024). A 70mV Input Bulk Switching Inductive-Load Ring Oscillator Based Start up Circuit for Thermal Energy Harvested DC-DC Boost Converter with 69% Efficiency. International Journal of Intelligent Systems and Applications in Engineering, 12(4), 2125–2133. Retrieved from https://ijisae.org/index.php/IJISAE/article/view/6547

Issue

Vol. 12 No. 4 (2024)

Section

Research Article

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