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A fully integrated switched-capacitor DC-DC converter with hybrid output regulation

机译：具有混合输出调节的完全集成的开关电容DC-DC转换器

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摘要

In this paper, we propose a fully integrated switched-capacitor (SC) DC-DC converter with hybrid output regulation that allows a predictable switching noise spectrum. The proposed hybrid output regulation method is based on the digital capacitance modulation for fine regulation and the automatic frequency scaling for coarse regulation. The automatic frequency scaler and on-chip current sensor are implemented to adjust the switching frequency at one of the frequencies generated by a binary frequency divider with change in load current. Thus, the switching noise spectrum of the proposed SC DC-DC converter can be predicted over the entire load range. In addition, the bottom-plate losses due to the parasitic capacitances of the flying capacitors and the gate-drive losses due to the gate capacitances of switches are reduced at light load condition since the switching frequency is automatically adjusted. The proposed SC DC-DC converter was implemented in a 0.13 A mu m CMOS process with 1.5 V devices, and its measurement results show that the peak efficiency and the efficiency at light load condition are 69.2% and higher than 45%, respectively, while maintaining a predictable switching noise spectrum.
机译：在本文中，我们提出了一种完全集成的开关电容（SC）DC-DC转换器，其具有混合输出调节，允许预测的开关噪声谱。所提出的混合输出调节方法是基于用于微调的数字电容调制和用于粗调的自动频率缩放。实现自动频率缩放器和片上电流传感器以调整由二进制分频器产生的一个频率的开关频率，随着负载电流的变化。因此，可以在整个负载范围内预测所提出的SC DC-DC转换器的开关噪声谱。另外，由于自动调节开关频率，因此在光负载条件下减小了由于飞行电容器的寄生电容和由于开关的栅极电容引起的栅极驱动损耗引起的底板损耗。所提出的SC DC-DC转换器在0.13 A MU M CMOS工艺中实现了1.5 V器件，其测量结果表明，光负荷条件下的峰值效率和效率分别为69.2％，而且高于45％保持可预测的开关噪声谱。

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