DOI QR코드

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Wide-Input Range Dual Mode PWM / Linear Buck Converter with High robustness ESD Protection Circuit

  • Song, Bo-Bae (Department of Electronics & Electric Engineering, Dankook University) ;
  • Koo, Yong-Seo (Department of Electronics & Electric Engineering, Dankook University)
  • 투고 : 2014.12.30
  • 심사 : 2015.03.22
  • 발행 : 2015.04.30

초록

This paper proposes a high-efficiency, dual-mode PWM / linear buck converter with a wide-input range. The proposed converter was designed with a mode selector that can change the operation between PWM / linear mode by sensing a load current. The proposed converter operates in a linear mode during a light load and in PWM mode during a heavy load condition in order to ensure high efficiency. In addition, the mode selector uses a bit counter and a transmission gate designed to protect from a malfunction due to noise or a time-delay. Also, in conditions between $-40^{\circ}C$ and $140^{\circ}C$, the converter has variations in temperature of $0.5mV/^{\circ}C$ in the PWM mode and of $0.24mV/^{\circ}C$ in the linear mode. Also, to prevent malfunction and breakdown of the IC due to static electricity, the reliability of IC was improved by embedding a self-produced 8 kV-class(Chip level) ESD protection circuit of a P-substrate Triggered SCR type with high robustness characteristics.

키워드

참고문헌

  1. Chi Yat Leung, "An Intergrated CMOS Current-Sensing Circuit for Low-Voltage Current-Mode Buck Regulator." IEEE Transactions on, Vol.52, pp. 394-397, July.2005
  2. Cheung Fai Lee, "A monolithic current-mode CMOS DC-DC converter with on-chip current-sensing technique." IEEE, Vol.39, pp. 3-14, Jan.2004
  3. Feng-Fei Ma, Wei-Zen Chen, "A Monolithic Current- Mode Buck Converter With Advanced Control and Protection Circuits" Power Electronics, IEEE,Vol.22 pp. 1836-1846, Sept. 2007 https://doi.org/10.1109/TPEL.2007.904237
  4. Zhang Bin, "A novel thermal-shutdown protection circuit" ASID 2009, pp. 535-538, Aug.2009
  5. Chao Zhang, Zhijia Yang, "A CMOS hysteresis undervoltage lockout with current source inverter structure" ASICON 2011, pp. 918-921, Oct.2011
  6. Zhao Fangla, "An undervoltage lockout of hysteretic threshold of zero temperature coefficients" APMC 2005, Vol.2, Dec.2005
  7. Angkititrakul. S, "Design and analysis of buck converter with pulse-skipping modulation" PESC 2008. IEEE, pp. 1151-1156, June.2008
  8. Ahmed Emira, "DC-DC Converter with ON-Time Control in Pulse-Skipping Modulation" Circuits and Systems (ISCAS), pp. 2746-2749, June.2010
  9. J.B. Jia and K.N. Leung, "Integrated ramp generator with auto-set hysteretic comparator for PWM voltage regulators" Electronics Letters ,Vol.43, pp. 1384-1385, Nov.2007 https://doi.org/10.1049/el:20072583
  10. Junsoo Park, "A Design of Peak Current-mode DCDC Buck Converter with ESD Protection Devices" IKEEE, Vol.17, pp. 77-82, Mar.2013 https://doi.org/10.7471/ikeee.2013.17.1.077
  11. Sao-Hunh Lu, "A Fast-Recovery Low Dropout Linear Regulator for Any-Type Output Capacitors" ASSCC 2005, pp. 497-500, Nov.2005
  12. Yangkook Ahn, Hyunseok Nam, "A 93.5% Efficiency, 400-mA Current-Mode DC-DC Buck Converter with Watchdog Functions" ISOCC 2009 , pp. 428-431, Nov.2009
  13. Wan-Rone Liou, Mei-Ling Yeh, "A High Efficiency Dual-Mode Buck Converter IC For Portable Application" Power Electronics, IEEE, Vol.23, pp.667-677, Mar.2008 https://doi.org/10.1109/TPEL.2007.915047
  14. Hora, J.A., Jiun-Chang Zeng, "Asynchronous dualmode buck converter design with protection circuits in 0.18um CMOS process for battery applications" ASIC 2009, ASICON '09, pp. 1314-1317, Oct.2009
  15. Bi, Zhuo, Xia, Wenbin, "A PWM/PFM switch technique of dual-mode buck converter" CCWMC2009, IET International Communication Conference, pp. 357-360, Dec.2009