Interleaving energy-conservation mode (IECM) control in single-inductor dual-output (SIDO) step-down converters with 91% peak efficiency

Yu Huei Lee*, Yao Yi Yang, Shih Jung Wang, Ke-Horng Chen, Ying Hsi Lin, Yi Kuang Chen, Chen Chih Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The proposed single-inductor dual-output (SIDO) converter with interleaving energy-conservation mode (IECM) control is designed using 65 nm technology to power the ultra-wide band (UWB) system. The energy-conservation mode (ECM) control generates four different energy delivery paths for dual buck outputs with only one inductor. In addition, the superposition technique is used to achieve a minimized inductor current level. The average inductor current is equal to the summation of two output loads. Moreover, the IECM control activates the interleaving operation through the current interleaving mechanism to provide large driving capability as well as to reduce the output voltage ripple. As a result, 91% peak efficiency is derived and the output voltage ripple appears notably minimized by 50% using current interleaving at heavy load. The test chip occupies 1.44 mm2 in 65 nm CMOS and integrates with a three-dimensional (3-D) architecture for inductor integration.

Original languageEnglish
Article number5723771
Pages (from-to)904-915
Number of pages12
JournalIEEE Journal of Solid-State Circuits
Volume46
Issue number4
DOIs
StatePublished - 1 Apr 2011

Keywords

  • Current interleaving
  • DC-DC converter
  • energy delivery path
  • output voltage ripple
  • power conversion efficiency
  • single-inductor dual-output (SIDO) converter
  • ultra-wide band (UWB) system

Fingerprint Dive into the research topics of 'Interleaving energy-conservation mode (IECM) control in single-inductor dual-output (SIDO) step-down converters with 91% peak efficiency'. Together they form a unique fingerprint.

Cite this