An off-chip input capacitor-less boost converter with fast MPPT for energy harvesting

Sangkwon Lee, Jinseong Jeong

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


In this paper, a boost converter with fast MPPT capability is proposed for energy harvesting applications. The sampling time for maximum power point voltage, VMPP of harvester device is extremely shortened by using inductor current conservation method and an offchip input capacitor-less boost converter. The proposed boost converter is designed in a standard 0.13μm CMOS process and compared with a conventional MPPT boost converter. The proposed architecture can sample VMPP more than 100 times faster than the conventional architecture. Power conversion efficiency of the harvesting system also improves due to the fast VMPP sampling. For the scenario used in this paper, the overall efficiency improves from 70% to 85%. This architecture can be applied to any energy harvesting systems and is especially effective when the ambient parameter such as temperature or light intensity changes relatively rapidly.

Original languageEnglish
Article number20140385
JournalIEICE Electronics Express
Issue number13
StatePublished - 19 Jun 2014


  • Boost converter
  • Dual-boundary control
  • Energy harvesting
  • Inductor current conservation
  • MPPT


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