| 便携应用DC-DC轻负载高效率的实现 |
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| 引用本文： | 袁冰,来新泉,李演明,叶强,王红义,贾新章.便携应用DC-DC轻负载高效率的实现[J].半导体学报,2008,29(6):1198-1203. |
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| 作者姓名： | 袁冰 来新泉 李演明 叶强 王红义 贾新章 |
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| 作者单位： | [1]西安电子科技大学微电子学院,西安710071 [2]西安电子科技大学电路CAD所,西安710071 |
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| 摘 要： | 提出了一种新颖的DC-DC环路控制结构.轻负载时芯片自动进入省电模式,通过检测反馈电压使其在待机状态与固定峰值状态切换工作,平均静态功耗以及开关功耗大大减小,提高了轻负载效率,延长了便携应用电池的使用时间.内部同步整流消除了肖特基二极管的使用,进一步提高了效率.该结构在一款0.5μm CMOS工艺的降压型DC-DC中进行了投片验证.输入电压3.6V,输出电压1.8V条件下,待机状态静态电流仅为25μA,0.1mA负载下效率高达62%.最高效率为96%.
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| 关 键 词： | 降压DC-DC变换器 效率 轻负载 省电模式 待机状态 |
High Efficiency Realization of a DC-DC Converter at Light Loads for Portable Applications |
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| Yuan Bing,Lai Xinquan,Li Yanming,Ye Qiang,Wang Hongyi and Jia Xinzhang.High Efficiency Realization of a DC-DC Converter at Light Loads for Portable Applications[J].Chinese Journal of Semiconductors,2008,29(6):1198-1203. |
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| Authors: | Yuan Bing Lai Xinquan Li Yanming Ye Qiang Wang Hongyi and Jia Xinzhang |
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| Affiliation: | School of Microelectronics,Xidian University,Xi'an 710071,China;Institute of Electronic CAD,Xidian University,Xi'an 710071,China;Institute of Electronic CAD,Xidian University,Xi'an 710071,China;School of Microelectronics,Xidian University,Xi'an 710071,China;Institute of Electronic CAD,Xidian University,Xi'an 710071,China;Institute of Electronic CAD,Xidian University,Xi'an 710071,China;School of Microelectronics,Xidian University,Xi'an 710071,China |
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| Abstract: | A novel control structure for a DC-DC converter is presented.At light loads,the chip enters power save mode automatically and works in fixed peak current mode with standby intervals by detecting the feedback voltage.It reduces the average quiescent and switching power loss greatly,which increases efficiency at light loads and extends battery life in portable systems.Internal synchronous rectification eliminates the need for a Schottky diode and increases efficiency further.A DC-DC buck converter with the pr... |
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| Keywords: | DC-DC buck converters efficiency light loads power save mode standby state |
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