23.1 A 0.15V-input energy-harvesting charge pump with switching body biasing and adaptive dead-time for efficiency improvement

Jungmoon Kim, Philip K T Mok, Chulwoo Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

29 Citations (Scopus)

Abstract

Design of low-voltage and efficient energy-harvesting circuits is becoming increasingly important, particularly, for autonomous systems. Since the amount of energy that can be harvested from the surrounding environment is limited, the available output voltage of a harvester is low. Therefore, the design of a low-input-voltage (low-VIN) up-converter is critical to self-powered systems [1-3]. Moreover, the form factor is very constrained in applications such as wearable electronic devices and sensor networks. Recently, low-V IN charge pumps (CPs) for energy harvesting has been compared with DC-DC converters using a large inductor [1-3]. CPs introduced in [1] and [2] use the advanced process technology to push VIN down to the subthreshold region. The CP in [1] introduces a forward-body-biasing (FBB) technique, which improves the voltage conversion efficiency (VCE) for low VIN but shows poor power conversion efficiency (PCE). The CP in [2] achieves the lowest operation voltage. However, the design with a 10-stage CP provides low output power. This paper presents a CP with switching-body-biasing (SBB), adaptive-dead-time (AD), and switch-conductance (SW-G) enhancement techniques to improve the PCE for low VIN as well as to extend the maximum load current.

Original languageEnglish
Title of host publicationDigest of Technical Papers - IEEE International Solid-State Circuits Conference
Pages394-395
Number of pages2
Volume57
DOIs
Publication statusPublished - 2014 Apr 14
Event2014 61st IEEE International Solid-State Circuits Conference, ISSCC 2014 - San Francisco, CA, United States
Duration: 2014 Feb 92014 Feb 13

Other

Other2014 61st IEEE International Solid-State Circuits Conference, ISSCC 2014
CountryUnited States
CitySan Francisco, CA
Period14/2/914/2/13

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Kim, J., Mok, P. K. T., & Kim, C. (2014). 23.1 A 0.15V-input energy-harvesting charge pump with switching body biasing and adaptive dead-time for efficiency improvement. In Digest of Technical Papers - IEEE International Solid-State Circuits Conference (Vol. 57, pp. 394-395). [6757484] https://doi.org/10.1109/ISSCC.2014.6757484