A microwatt switched-capacitor voltage doubler-based voltage regulator for ultra-low power energy harvesting systems

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Abstract

This paper presents an SC voltage doubler-based voltage regulator for ultra-low power energy harvesting applications. It produces a stable 1.2-V power supply, using inputs from 0.63 to 1.8 V. External compensation and an on-chip output capacitor ensure good performance even with zero load current and any load capacitance. The regulator tolerates arbitrary input ramp-ups, and is immune to blackout and brownout. A stability analysis for the regulator control loop is presented. The regulator ASIC is implemented in a 180 nm CMOS process. The measured regulator peak power and current efficiency are 63 and 49 %, respectively. The performance has been characterized with load currents from zero to (Formula presented.)A.

Details

Original languageEnglish
Pages (from-to)347–358
Number of pages12
JournalAnalog Integrated Circuits and Signal Processing
Volume88
Issue number2
Publication statusPublished - Aug 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • Brownout, Energy harvesting, SC voltage converter, Start-up, Ultra-low power, Voltage regulator

ID: 1872215