A Multiphase Buck Converter With a Rotating Phase-Shedding Scheme For Efficient Light-Load Control

被引：48

作者：

Ahn, Youngkook ^{[1
]}

Jeon, Inho ^{[1
]}

Roh, Jeongjin ^{[1
]}

机构：

[1] Hanyang Univ, Dept Elect Engn, Ansan 426791, South Korea

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2014年 / 49卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

Efficient light-load control; multiphase dc-dc converter; PFM control; rotating phase shedding; DC-DC CONVERTER; VOLTAGE REGULATOR;

D O I：

10.1109/JSSC.2014.2360400

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Mobile devices need to minimize their power consumption in order to maximize battery runtime, except during short extremely busy periods. This requirement makes dc-dc converters usually operate in standby mode or under light-load conditions. Therefore, implementation of an efficient regulation scheme under a light load is a key aspect of dc-dc converter design. This paper presents a multiphase buck converter with a rotating phase-shedding scheme for efficient light-load control. The converter includes four phases operating in an interleaved manner in order to supply high current with low output ripple. The multiphase converter implements a rotating phase-shedding scheme to distribute the switching activity concentrated on a single phase, resulting in a distribution of the aging effects among the phases instead of a single phase. The proposed multiphase buck converter was fabricated using a 0.18 mu m bipolar CMOS DMOS process. The supply voltage ranges from 2.7 V to 5 V, and the maximum allowable output current is 4.5 A.

引用

页码：2673 / 2683

页数：11

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