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Design of anti-jamming current-sensing circuit for current-mode buck regulator

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【作者】 袁冰来新泉李演明叶强贾新章

【Author】 Yuan Bing1,2, Lai Xinquan1, Li Yanming2, Ye Qiang1, and Jia Xinzhang2 (1 Institute of Electronic CAD, Xidian University, Xi’an 710071, China) (2 School of Microelectronics, Xidian University, Xi’an 710071, China)

【机构】 Institute of Electronic CAD, Xidian UniversitySchool of Microelectronics, Xidian University

【摘要】 A novel anti-jamming integrated CMOS current-sensing circuit for current-mode buck regulators is pre- sented. Based on the widely-used traditional current-sensing structure, anti-jamming performance is improved sig- nificantly by adding on-chip capacitors and one-shot circuit. Also the transient response is faster through the in- troduction of current offset. The circuit is concise, simple to implement and suits for SoC applications with single power supply. A dual-output current-mode DC-DC buck converter with proposed structure has been fabricated with a 0.5 μm CMOS process for validation. In the 2.5–5.5 V input range, the two channels work steadily in the load current range of 0–600 mA. And the measured maximum efficiency is up to 96%.

【Abstract】 A novel anti-jamming integrated CMOS current-sensing circuit for current-mode buck regulators is pre- sented. Based on the widely-used traditional current-sensing structure, anti-jamming performance is improved sig- nificantly by adding on-chip capacitors and one-shot circuit. Also the transient response is faster through the in- troduction of current offset. The circuit is concise, simple to implement and suits for SoC applications with single power supply. A dual-output current-mode DC-DC buck converter with proposed structure has been fabricated with a 0.5 μm CMOS process for validation. In the 2.5–5.5 V input range, the two channels work steadily in the load current range of 0–600 mA. And the measured maximum efficiency is up to 96%.

【基金】 supported by the National Key Pre-Research Program of China (Nos. D1120060967, Y30306270105)
  • 【文献出处】 半导体学报 ,Journal of Semiconductors , 编辑部邮箱 ,2009年04期
  • 【分类号】TN43
  • 【被引频次】4
  • 【下载频次】155
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