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An 80 mV Startup Dual-Mode Boost Converter by Charge-Pumped Pulse Generator and Threshold Voltage Tuned Oscillator With Hot Carrier Injection

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7 Author(s)
Po-Hung Chen ; Inst. of Ind. Sci., Univ. of Tokyo, Tokyo, Japan ; Xin Zhang ; Ishida, K. ; Okuma, Y.
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This paper presents an 80 mV startup-voltage dual-mode boost converter for energy harvesting applications. The charge-pumped pulse generator enables a startup operation of the boost converter from the input voltage of 80 mV. The threshold voltage tuned oscillator for the clock generator of the boost converter compensates for the die-to-die process variation by a hot carrier injection (HCI), thereby reducing the minimum operation voltage (VDDMIN) of the clock generator by 45% with a trimming time of 10 minutes. The proposed step-up converter achieves the lowest startup voltage without using a mechanical switch or a large transformer.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:47 ,  Issue: 11 )