Interleaving Energy-Conservation Mode (IECM) Control in Single-Inductor Dual-Output (SIDO) Step-Down Converters With 91% Peak Efficiency

Author

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

Author_Institution

Inst. of Electr. Control Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

46

Issue

4

fYear

2011

fDate

4/1/2011 12:00:00 AM

Firstpage

904

Lastpage

915

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.

Keywords

CMOS integrated circuits; inductors; power convertors; three-dimensional integrated circuits; ultra wideband communication; 3D architecture; CMOS; inductor current; inductor integration; interleaving energy conservation mode control; single inductor dual output step down converters; superposition technique; ultrawide band system; Converters; Electronic countermeasures; Inductors; Sensors; Switches; Voltage control; 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;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2011.2108850

Filename

5723771