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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概要

• 論文の詳細を見る

• 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 65nm 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%.

• （社）電子情報通信学会の論文
• 2011-06-01

著者

• ISHIDA Koichi

  The University of Tokyo

• TAKAMIYA Makoto

  The University of Tokyo

• SAKURAI Takayasu

  The University of Tokyo

• Takamiya Makoto

  Institute Of Industrial Science The University Of Tokyo

• Sakurai Takayasu

  Institute Of Industrial Science The University Of Tokyo

• Chen Po-hung

  The University Of Tokyo

• Okuma Yasuyuki

  Semiconductor Technology Academic Research Center (starc)

• Zhang Xin

  The University Of Tokyo

• Pu Yu

  University of Tokyo

• Ryu Yoshikatsu

  Semiconductor Technology Academic Research Center (STARC)

• PU Yu

  The University of Tokyo

• Takamiya Makoto

  The Univ. Of Tokyo

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