A multistage interleaved synchronous buck converter with integrated output filter in 0.18 μm SiGe process

Siamak Abedinpour, Bertan Bakkaloglu, Sayfe Kiaei

Research output: Contribution to journalArticle

76 Scopus citations

Abstract

The design and analysis of a fully integrated multistage interleaved synchronous buck dc-dc converter with on-chip filter inductor and capacitor is presented. The dc-dc converter is designed and fabricated in 0.18 μm SiGe RFBiCMOS process technology and generates 1.5 V-2.0 V programmable output voltage supporting a maximum output current of 200 mA. High switching frequency of 45 MHz, multiphase interleaved operation, and fast hysteretic controller reduce the filter inductor and capacitor sizes by two orders of magnitude compared to state-of-the-art converters and enable a fully integrated converter. The fully integrated interleaved converter does not require off-chip decoupling and filtering and enables direct battery connection for integrated applications. This design is the first reported fully integrated multistage interleaved, zero voltage switching synchronous buck converter with monolithic output filters. The fully integrated buck regulator achieves 64% efficiency while providing an output current of 200 mA.

Original languageEnglish (US)
Pages (from-to)2164-2175
Number of pages12
JournalIEEE Transactions on Power Electronics
Volume22
Issue number6
DOIs
Publication statusPublished - Nov 2007

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Keywords

  • DC-DC power converters
  • Fully integrated switched-mode (SM) dc-dc converter
  • Interleaved synchronous buck converter
  • Switching circuits
  • Zero voltage switching
  • Zero voltage switching (ZVS)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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