JSTS:Journal of Semiconductor Technology and Science

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A Highly Power-Efficient Single-Inductor Multiple-Outputs (SIMO) DC-DC Converter with Gate Charge Sharing Method

  • Nam, Ki-Soo (Department of Electronic Engineering, Hanyang University) ;
  • Seo, Whan-Seok (Department of Electronic Engineering, Hanyang University) ;
  • Ahn, Hyun-A (Department of Electronic Engineering, Hanyang University) ;
  • Jung, Young-Ho (Department of Electronic Engineering, Hanyang University) ;
  • Hong, Seong-Kwan (Department of Electronic Engineering, Hanyang University) ;
  • Kwon, Oh-Kyong (Department of Electronic Engineering, Hanyang University)
  • Received : 2014.05.09
  • Accepted : 2014.08.11
  • Published : 2014.10.30
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Abstract

This paper proposes a highly power-efficient single-inductor multiple-outputs (SIMO) DC-DC converter with a gate charge sharing method in which gate charges of output switches are shared to improve the power efficiency and to reduce the switching power loss. The proposed converter was fabricated by using a $0.18{\mu}m$ CMOS process technology with high voltage devices of 5 V. The input voltage range of the converter is from 2.8 V to 4.2 V, which is based on a single cell lithium-ion battery, and the output voltages are 1.0 V, 1.2 V, 1.8 V, 2.5 V, and 3.3 V. Using the proposed gate charge sharing method, the maximum power efficiency is measured to be 87.2% at the total output current of 450 mA. The measured power efficiency improved by 2.1% compared with that of the SIMO DC-DC converter without the proposed gate charge sharing method.

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References

  1. C. Shi, B. C. Walker, E. Zeisel, B. Hu, and G. H. McAllister, "A Highly Integrated Power Management IC for Advanced Mobile Applications," IEEE J. Solid-State Circuits, Vol. 42, No. 8, pp. 1723-1731, Aug. 2007. https://doi.org/10.1109/JSSC.2007.900284
  2. Y. Ko, Y. Jang, S.-K. Han, and S.-G. Lee, "A Fast Low Dropout Regulator with High Slew Rate and Large Unity-Gain Bandwidth," J. Semicond. Technol. Sci., Vol. 13, No. 4, pp. 263-271, Aug. 2013. https://doi.org/10.5573/JSTS.2013.13.4.263
  3. M.-H. Huang, P.C. Fan, and K.-H. Chen, "Low-Ripple and Dual-Phase Charge Pump Circuit Regulated by Switched-Capacitor-Based Bandgap Reference," IEEE Trans. Power Electron., Vol. 24, No. 5, pp. 1161-1172, May 2009. https://doi.org/10.1109/TPEL.2008.2010546
  4. D. Ma, W.-H. Ki, C.-Y. Tsui, and P. K. T. Mok, "Single-Inductor Multiple-Output Switching Converters with Time-Multiplexing Control in Discontinuous Conduction Mode," IEEE J. Solid-State Circuits, Vol. 38, No. 1, pp. 89-100, Jan. 2003. https://doi.org/10.1109/JSSC.2002.806279
  5. D. Ma, W.-H. Ki, and C.-Y. Tsui, "A Pseudo-CCM/DCM SIMO Switching Converter with Freewheel Switching," in IEEE ISSCC Dig. Tech. Papers, pp. 390-391, Feb. 2002.
  6. M. Belloni, E. Bonizzoni, and F. Maloberti, "On the Design of Single-Inductor Multiple-Output DCDC Buck Converters," in Proc. IEEE ISCAS, pp 3049-3052, May 2008.
  7. H.-P. Le, C.-S. Chae, K.-C. Lee, S.-W. Wang, G.-H. Cho, and G.-H. Cho, "A Single-Inductor Switching DC-DC Converter With Five Output and Ordered Power-Distributive Control," IEEE J. Solid-State Circuits, Vol. 42, No. 12, pp. 2706-2714, Dec. 2007. https://doi.org/10.1109/JSSC.2007.908767
  8. S.-W. Wang, G.-H. Cho, and G.-H. Cho, "A High-Stability Emulated Absolute Current Hysteretic Control Single-Inductor 5-output Switching DCDC converter with Energy Sharing and Balancing," in IEEE ISSCC Dig. Tech. Papers, pp. 276-277, Feb. 2012.
  9. D. Lu, Y. Qian, and Z. Hong, "An 87%-Peak-Efficiency DVS-Capable Single-Inductor 4-Output DC-DC Buck Converter with Ripple-Based Adaptive Off Time Control," in IEEE ISSCC Dig. Tech. Papers, pp. 82-83, Feb. 2014.
  10. C.-W. Kuan and H.-C. Lin, "Near-Independently Regulated 5-Output Single-Inductor DC-DC Buck Converter Delivering 1.2W/$mm^2$ in 65nm CMOS," in IEEE ISSCC Dig. Tech. Papers, pp. 274-275, Feb. 2012.
  11. A. Pizzutelli and M. Ghioni, "Novel Control Technique for Single Inductor Multiple Output Converters Operating in CCM with Reduced Cross-Regulation," in Proc. of IEEE APEC, pp. 1502-1507, Feb. 2008.
  12. Y.-H. LEE, T.-C. Huang, Y.-Y. Yang, W.-S. Chou, K.-H. Chen, C.-C. Huang, and Y.-H. Lin, "Minimized Transient and Steady-State Cross Regulation in 55-nm CMOS Single-Inductor Dual-Output (SIDO) Step-Down DC-DC converter," IEEE J. Solid-State Circuits, Vol. 46, No. 11, pp. 2488-2499, Nov. 2011. https://doi.org/10.1109/JSSC.2011.2164019