A single-inductor 7+7 ratio reconfigurable resonant switched-capacitor DC-DC converter with 0.1-to-1.5V output voltage range
A single-inductor 7+7 ratio reconfigurable resonant switched-capacitor DC-DC converter with 0.1-to-1.5V output voltage range
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具有 0.1 至 1.5V 输出电压范围的单电感器 7 7 比率可重构谐振开关电容器 DC-DC 转换器
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
P. Mercier
中科院分区：
文献类型：
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作者：
Loai G. Salem;P. Mercier
本文演示了第一个7比谐振开关电容（SC）转换器，只用一个单一的电感，实现了最宽的谐振工作范围的CMOS报告。介绍了一种频率缩放的齿轮系SC拓扑，其通过消除现有技术中所需的级间解耦，使得能够通过一个电感器以任意二进制比对所有飞跨电容器进行软充电。提出了齿轮比调制来控制谐振Q因子，因此调节器可以从谐振转换器优雅地过渡到全电容SC，使得能够> 24，000 x输出电流范围。对于相同的尺寸，转换器实现了高达14.4%和12%的效率分别比联合制造的SC和3电平降压转换器，而工作在73.3%的峰值效率和0.14 A/mm 2的电流密度在0.18 μm的体积。
This paper demonstrates the first 7-ratio resonant switched capacitor (SC) converter using only a single inductor, realizing the widest resonant operating range reported in CMOS. A frequency-scaled gear train SC topology is introduced that enables soft-charging of all flying capacitors through one inductor at any arbitrary binary ratio by eliminating the inter-stage decoupling required in prior-art. Gear ratio modulation is proposed to control the resonance Q-factor, and hence the regulator can be gracefully transitioned from a resonant converter to a fully-capacitive SC, enabling > 24,000x output current range. For the same footprint, the converter achieves up to 14.4% and 12% efficiency improvements over co-fabricated SC and 3-level buck converters, respectively, while operating with a peak efficiency of 73.3% and current density of 0.14 A/mm2 in 0.18 μm bulk.