A High Efficiency Dual-Mode Buck Converter IC For Portable Applications

摘要：

This paper presents the design of a novel wide output current range dual-mode DC to DC step-down (Buck) switching regulator/converter. The converter can adaptively switch between pulse-width modulation (PWM) and pulse-frequency modulation (PFM) both with very high conversion efficiency. Soft start operation is designed to eliminate the excess large current at the start up of the regulator. The chip has been fabricated with a TSMC 2P4M 0.35 μ m polycide CMOS process. The range of the operation voltage is from 2.7 V to 5 V, which is suitable for single-cell lithium-ion battery supply applications. The maximum conversion efficiency is 95％ at 50 mA load current. Above 85 ％ conversion efficiency can be reached for load current from 3 to 460 mA.

作者: Wan-Rone Liou Tsung-Hsing Chen Yueh-Lung Mei-Ling Yeh

作者单位: Graduate Institute of Electrical Engineering, National Taipei University, Sanhsia, Taiwan Kuo, and Tang-Yu Huang Department of Electrical Engineering National Taiwan Ocean University Keelung Department of Electronic Engineering, St.Johns University, Tamsui, Taiwan.

会议类型: 国际会议

会议名称: 2007年通信、电路与系统国际会议(2007 International Conference on Communications,Circuits and Systems Proceedings)

会议地点: 日本福冈

会议语种:英文

在线出版日期: 2007-07-11（万方平台首次上网日期，不代表论文的发表时间）