JSTS:Journal of Semiconductor Technology and Science

  • 제16권6호
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  • Pages.842-846
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  • 2016
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  • 1598-1657(pISSN)
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  • 2233-4866(eISSN)
대한전자공학회 (The Institute of Electronics and Information Engineers)
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A 82.5% Power Efficiency at 1.2 mW Buck Converter with Sleep Control

  • Son, Chung Hwan (Div. of Electronics and Electrical Engineering, Dongguk University) ;
  • Byun, Sangjin (Div. of Electronics and Electrical Engineering, Dongguk University)
  • 투고 : 2016.05.08
  • 심사 : 2016.08.11
  • 발행 : 2016.12.30
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초록

This paper presents a DC-DC buck converter which uses a sleep control to improve the power efficiency in a few mW light load condition. The sleep control turns off analog controller building blocks to reduce the static power losses during the off-duty period of pulse width modulation. For verification, a buck converter has been implemented in a $0.18{\mu}m$ CMOS process. The power efficiency has been improved from 76.7% to 82.5% with a 1.2 mW load. The maximum power efficiency is 95% with a 9 mW load.

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참고문헌

  1. J. Wang, J. Xu, G. Zhou and B. Bao, "Pulse-Train-Controlled CCM Buck Converter With Small ESR Output-Capacitor" Industrial Electronics, IEEE Transactions on, Vol. 60, No. 12, pp. 5875-5881, Dec., 2013. https://doi.org/10.1109/TIE.2012.2232258
  2. E. N. Y. Ho and P. K. T. Mok, "Design of PWM Ramp Signal in Voltage-Mode CCM Random Switching Frequency Buck Converter for Conductive EMI Reduction," Circuits and Systems I, IEEE Transactions on, Vol. 60, No. 2, pp. 505-515, Feb., 2013. https://doi.org/10.1109/TCSI.2012.2215796
  3. P. Y. Wu, S. Y. S. Tsui and P. K. T. Mok, "Areaand Power-Efficient Monolithic Buck Converters With Pseudo-Type III Compensation," Solid-State Circuits, IEEE Journal of, Vol. 45, No. 8, pp. 1446-1455, Aug., 2010. https://doi.org/10.1109/JSSC.2010.2047451
  4. M. K. Alghamdi and A. A. Hamoui, "A Spurious-Free Switching Buck Converter Achieving Enhanced Light-Load Efficiency by Using a ${\Delta}{\Sigma}$-Modulator Controller With a Scalable Sampling Frequency," Solid-State Circuits, IEEE Journal of, vol. 47, no. 4, pp. 841-851, Apr., 2012. https://doi.org/10.1109/JSSC.2012.2185179
  5. S. Cliquennois, A. Donida, P. Malcovati, A. Baschirotto, and A. Nagari, "A 65-nm, 1-A Buck Converter With Multi-Function SAR-ADC-Based CCM/PSK Digital Control Loop," Solid-State Circuits, IEEE Journal of, vol. 47, no. 7, pp. 1546-1556, Jul., 2012. https://doi.org/10.1109/JSSC.2012.2191214
  6. G. Zhou, S. He, X. Zhang, and S. Zhong, "Critical output-capacitor ESR for stability of $V^2$ controlled buck converter in CCM and DCM," Electronics Letters, vol. 50, no. 12, pp. 884-886, Jun., 2014. https://doi.org/10.1049/el.2014.0419
  7. R. Nowakowski and N. Tang, "Efficiency of synchronous versus nonsynchronous buck converters," Analog Applications Journal, 4Q, 2009. http://www.ti.com/lit/an/slyt358/slyt358.pdf
  8. S. Bandyopadhyay, Y. K. Ramadass and A. P. Chandrakasan, "20 ${\mu}$A to 100 mA DC-DC Converter With 2.8-4.2 V Battery Supply for Portable Applications in 45 nm CMOS," Solid-State Circuits, IEEE Journal of, vol. 46, no. 12, pp. 2807-2820, Dec., 2011. https://doi.org/10.1109/JSSC.2011.2162914
  9. K. Kwan and P. Kim, "Converter with crossover frequency responsive to switching frequency," U. S. Patent 8493049 B2, Jul., 2013.
  10. Y.-H. Lee, Y.-Y. Yang, S.-J. Wang, K.-H. Chen, Y.-H. Lin, Y.-K. Chen and C.-C. Huang, "Interleaving Energy-Conservation Mode (IECM) Control in Single-Inductor Dual-Output (SIDO) Step-Down Converters With 91% Peak Efficiency," Solid-State Circuits, IEEE Journal of, vol. 46, no. 4, pp. 904-915, Apr., 2011. https://doi.org/10.1109/JSSC.2011.2108850
  11. C.-W. Chen and A. Fayed, "A Low-Power Dual-Frequency SIMO Buck Converter Topology With Fully-Integrated Outputs and Fast Dynamic Operation in 45 nm CMOS," Solid-State Circuits, IEEE Journal of, vol. 50, no. 9, pp. 2161-2173, Sep., 2015. https://doi.org/10.1109/JSSC.2015.2422782
  12. C. Huang and P. K. T. Mok, "An 84.7% Efficiency 100-MHz Package Bondwire-Based Fully Integrated Buck Converter With Precise DCM Operation and Enhanced Light-Load Efficiency," Solid-State Circuits, IEEE Journal of, vol. 48, no. 11, pp. 2595-2607, Nov., 2013. https://doi.org/10.1109/JSSC.2013.2274826