Current-mode DC-DC Buck Converter with Reliable Hysteretic-Mode Control and Dual Modulator for Fast Dynamic Voltage Scaling

被引：2
|
作者：
Kim, Jungmoon [1 ]
Chu, Hyunho [1 ]
Kim, Chulwoo [1 ]
机构：
[1] Korea Univ, Dept Elect Engn, Seoul, South Korea
来源：
2009 52ND IEEE INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1 AND 2 | 2009年
关键词：
D O I：
10.1109/MWSCAS.2009.5235921
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper describes an integrated current-mode buck converter with reliable hysteretic mode controller and modulators for fast dynamic voltage scaling (DVS). The proposed mode controller and modulators enable the DC-DC buck converter to perform its smooth mode transitions at optimal points. The continuous current-limiting and DCM controls drive the DVS to track the reference at the maximum speed in both PWM and PFM modes. The DC-DC buck converter is implemented in a 90-nm 33V CMOS process. The maximum efficiency reaches 94.5%. The hysteretic mode controller keeps its efficiency always at more than 75% for any load conditions. During a mode transition, the output voltage has no overshoots, and it can track the reference voltage instantly.
引用
收藏
页码：941 / 944
页数：4
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