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A 1MHz, 3.3-V Synchornous Buck DC/DC Converter Using CMOS OTAs  

Park Kyu-Jin (Department of Electronics, Electrical, Control, and Instrumentation Engineering, Hanyang University)
Kim Hoon (Department of Electronics, Electrical, Control, and Instrumentation Engineering, Hanyang University)
Kim Hee-Jun (School of Electronics and Information Engineering Hanyang University)
Chung Won-Sup (School of Electronics and Information Engineering, Chongju University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.43, no.5, 2006 , pp. 28-35 More about this Journal
Abstract
This paper presents a new 3.3-1 V synchronous buck DC/DC converter that employs CMOS operational transconductance amplifiers (OTAs) as circuit-building blocks. An error amplifier OTA in a PWM circuit is compensated for to improve temperature stability. The temperature coefficient of the transconductance gain of the compensated OTA is less than $150\;ppm/^{\circ}C\;over\;0-100^{\circ}C$. The HSPICE simulation results of the $0.3{\mu}m$ standard CMOS technology show that the efficiency of the proposed converter is as high as 80% in the load current range of 40-125 mA. These results show that the proposed converter is adequate for use in battery-operated systems.
Keywords
Synchronous buck converters; Operational transconductance amplifiers; Analog integrated circuits;
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1 Y. Sugimoto and S. Kojima, 'A 1MHz, Synchronous, Step-down from 3.6 V to 1 V, PWM CMOS DC-DC converter with more than 80% of Power Efficiency,' IEICE Trans. Electron., vol. E87-C, no. 3, Mar. 2004
2 W. Kursun, V. K. De, E. G. Friedman, and S. G. Narendra, 'Monolithic voltage conversion in low-voltage CMOS technologies,' Microelectronics Journal, vol. 36, pp. 863-867, Sep. 2005   DOI   ScienceOn
3 W.-S. Chung, H. Kim, H.-W. Cha, and H.-J. Kim, 'Triangular/Square-Wave Generator With Independently Controllable Frequency and Amplitude,' IEEE Trans. Instrum Meas., vol. 54, no. 1, pp. 105-109, Feb. 2005   DOI   ScienceOn
4 R. Jacob Baker, CMOS Circuit design, Layout, and Simulation 2nd Ed., IEEE Press Series, A John Wiley & Sons, Inc., 2005
5 P. E. Allen, and D. R. Holberg, CMOS Analog Circuit Design 2nd Ed., Oxford Univ, press, New York, 2002
6 A. P. Chandrakasan, S. Sheng, and R. W. Brodersen, 'Low-power CMOS digital design,' IEEE J. Solid-State Circuits, vol. 27, no. 4, pp. 473-484, Apr. 1992   DOI   ScienceOn
7 D. Liu and C. Svensson, 'Trading speed for low power by choice of supply and threshold voltages,' IEEE J. Solid-State Circuits, vol. 28, no. 1, pp. 10-17, Jan. 1993   DOI   ScienceOn
8 S.-H. Jung, N.-S. Jung, J-T. Hwang, and G.-H. Cho, 'An Integrated CMOS DC-DC Converter for Battery-Operated Systems,' Proc. IEEE Power Electronics Specialists Conf., vol. 1, pp. 43-47, July 1999   DOI
9 W. Lau and S. R. Sanders, 'An Integrated Controller for a High Frequency Buck Converter,' Proc. IEEE Power Electronics Specialists Cont, vol. 1, pp. 246-254, Jun. 1997
10 O. Djeki, M. Brokovi, and A. Roy, 'High frequency Synchronous Buck Converter For Low Voltage Applications,' Proc. IEEE Power Electronics Specialists Cont, vol. 2, pp. 1248-1254, May 1998
11 A. J. Stratakos, S. R. Sanders, and R. W. Brodersen, 'A Low-Voltage CMOS DC-DC Converter for a Portable Battery-Operated System,' Proc. IEEE Power Electronics Specialists Conf., vol. 1, pp. 619-626, Jun. 1994
12 S. Zhou, and G. A. Rincn-Mora, 'A High Efficiency, Soft Switching DC-DC Converter with Adaptive Current-Ripple Control for Portable Applications,' IEEE Trans. Circuits Syst. II: Express Briefs, Accepted for future publication, 2005