A 5-MHz 91% Peak-Power-Efficiency Buck Regulator With Auto-Selectable Peak- and Valley-Current Control

被引:0
作者
Du, Mengmeng [1 ]
Lee, Hoi [1 ]
机构
[1] Univ Texas Dallas, Dept Elect Engn, Richardson, TX 75080 USA
来源
IEEE CUSTOM INTEGRATED CIRCUITS CONFERENCE 2010 | 2010年
关键词
DC-DC CONVERTERS;
D O I
暂无
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
This paper presents a multi-MHz buck regulator for portable applications using an auto-selectable peak- and valley-current control (ASPVCC) scheme. The proposed ASPVCC scheme and the dynamically-biased shunt feedback in the current sensors relax the settling-time requirement of the current sensing and improve the sensing speed. The proposed converter can thus operate at high switching frequencies with a wide range of duty ratios for reducing the required inductance. Implemented in a 0.35-mu m CMOS process, the proposed buck converter can operate at 5-MHz with a duty-ratio range of 0.6, use a small-value off-chip inductor of 1 mu H, and achieve 91% peak power efficiency.
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页数:4
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