| 可实现DVS的单电感双输出降压型直流-直流转换器 |
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| 引用本文： | 管璐璐,许伟伟,李叶,洪志良.可实现DVS的单电感双输出降压型直流-直流转换器[J].固体电子学研究与进展,2013,33(1):86-91. |
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| 作者姓名： | 管璐璐 许伟伟 李叶 洪志良 |
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| 作者单位： | 复旦大学专用集成电路与系统国家重点实验室,上海,201203 |
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| 基金项目： | 国家重点实验室资助项目(2011ZD003);Dialog公司合作项目 |
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| 摘 要： | 设计了一款单电感双输出(SIDO)的降压型直流-直流转换器,一个输出电压可以进行动态电压转换,在0.725～1.2V直接变化,另一输出电压可实现1.2V和1.8V,两路输出最大可实现500mA负载电流。转换器根据负载的不同在脉冲宽度调制(PWM)和脉冲频率调制(PFM)之间自动切换。采用死区时间自适应调整的技术来提高系统的转换效率,分段开关则用来降低输出端毛刺。基于TSMC0.25μm CMOS工艺,测试结果证明该系统输出电压纹波低、毛刺小,系统峰值效率可达90%。
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| 关 键 词： | 单电感双输出 死区自适应调节 动态电压调整 分段导通 |
A Single-inductor Dual-output Buck DC-DC Converter with Adaptive Dead Time Adjustment and Dynamic Voltage Scaling |
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| GUAN Lulu
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XU Weiwei
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LI Ye
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HONG Zhiliang.A Single-inductor Dual-output Buck DC-DC Converter with Adaptive Dead Time Adjustment and Dynamic Voltage Scaling[J].Research & Progress of Solid State Electronics,2013,33(1):86-91. |
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| Authors: | GUAN Lulu XU Weiwei LI Ye HONG Zhiliang |
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| Affiliation: | (ASIC & System State Key Laboratory,Fudan University,Shanghai,201203,CHN) |
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| Abstract: | A single-inductor dual-output(SIDO) DC-DC converter having one output of 0.725～1.2 V with dynamic voltage scaling(DVS) and another output of 1.2 V/1.8 V is presented.Both channels can have the maximal load current of 500 mA.The converter can switch between the pulse-frequency modulation(PFM) mode and the pulse-width modulation(PWM) mode automatically according to load condition.Adaptive dead time adjustment is introduced in the system to improve efficiency and the segment driving for the power switches is implemented to reduce spikes.This converter has been fabricated in 0.25 μm CMOS mixed signal process.The peak conversion efficiency can reach 90%. |
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| Keywords: | single-inductor dual-output(SIDO) adaptive dead time control dynamic voltage control segment driving |
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