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首页> 外文期刊>IEICE Transactions on Electronics >A Variable Output Voltage Switched-Capacitor DC-DC Converter with Pulse Density and Width Modulation (PDWM) for 57% Ripple Reduction at Low Output Voltage
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A Variable Output Voltage Switched-Capacitor DC-DC Converter with Pulse Density and Width Modulation (PDWM) for 57% Ripple Reduction at Low Output Voltage

机译:具有脉冲密度和宽度调制(PDWM)的可变输出电压开关电容器DC-DC转换器,可在低输出电压下降低57%的纹波

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摘要

In this paper, a novel switched-capacitor DC-DC converter with pulse density and width modulation (PDWM) is proposed with reduced output ripple at variable output voltages. While performing pulse density modulation (PDM), the proposed PDWM modulates the pulse width at the same time to reduce the output ripple with high power efficiency. The prototype chip was implemented using 65 nm CMOS process. The switched-capacitor DC-DC converter has 0.2-V to 0.47-V output voltage and delivers 0.25-mA to 10-mA output current from a 1-V input supply with a peak efficiency of 87%. Compared with the conventional PDM scheme, the proposed switched-capacitor DC-DC converter with PDWM reduces the output ripple by 57% in the low output voltage region with the efficiency penalty of 2%.
机译:本文提出了一种新颖的具有脉冲密度和宽度调制(PDWM)的开关电容器DC-DC转换器,该转换器在可变输出电压下具有减小的输出纹波。在执行脉冲密度调制(PDM)时,建议的PDWM同时调制脉冲宽度,以高功率效率降低输出纹波。原型芯片采用65 nm CMOS工艺实现。开关电容器DC-DC转换器具有0.2V至0.47V的输出电压,并从1V输入电源提供0.25mA至10mA的输出电流,峰值效率为87%。与传统的PDM方案相比,所提出的具有PDWM的开关电容器DC-DC转换器在低输出电压区域将输出纹波减小了57%,效率损失为2%。

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