J. Semicond. > 2014, Volume 35 > Issue 5 > 055005
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SEMICONDUCTOR INTEGRATED CIRCUITS

A voltage-mode DC-DC buck converter with fast output voltage-tracking speed and wide output voltage range

Miao Yang1, , Baixue Zhang1, Yun Cao2, Fengfeng Sun2 and Weifeng Sun2

+ Author Affiliations

 Corresponding author: Yang Miao, Email:yangmiao8623@163.com

DOI: 10.1088/1674-4926/35/5/055005

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Abstract: A high switching frequency voltage-mode buck converter with fast voltage-tracking speed and wide output voltage range has been proposed. A novel error amplifier (EA) is presented to achieve a high DC gain and get high phase margin, including a resistor and capacitor net, a unit gain block and a high gain block. The investigated converter has been fabricated with GF 0.35 μm CMOS process and can operate at 6 MHz with the output voltage range from 0.6 to 3.4 V. The experimental results show that the voltage-tracking speed can achieve 8.8 μs/V for up-tracking and 6 μs/V for down-tracking. Besides, the recovery time is less than 8 μs while the load current suddenly changes 400 mA.

Key words: DC-DC buck converter, voltage-mode, voltage-tracking speed



[1]
Su F, Ki W H, Tsui C Y. Ultra fast fixed-frequency hysteretic buck converter with maximum charging current control and adaptive delay compensation for DVS applications. IEEE J Solid-State Circuits, 2008, 43(4):815 doi: 10.1109/JSSC.2008.917533
[2]
Lee Y H, Huang S C. Power-tracking embedded buck-boost converter with fast dynamic voltage scaling for the SoC system. IEEE Trans Power Electron, 2012, 27(3):1271 doi: 10.1109/TPEL.2010.2101085
[3]
Tan M, Zhou Q. A end-point prediction scheme with constant amplitude ramp signal suitable for high voltage applications. IEEE International Conference of Electron Devices and Solid-State Circuits (EDSSC), Chongqin, China, 2010 http://ieeexplore.ieee.org/document/5713748/
[4]
Chen H, Ma D. A fast-transient DVS-capable switching converter with Δ IL-emulated hysteretic control. Symposium on VLSI Circuits (VLSIC), Honolulu, America, 2011:282 http://ieeexplore.ieee.org/document/5713748/
[5]
Du M, Liu J. A 5-MHz 91% peak-power-efficiency buck regulator with auto-selectable peak-and valley-current control. IEEE J Solid-State Circuits, 2011, 46(8):1928 doi: 10.1109/JSSC.2011.2151470
Fig. 1.  The voltage-mode buck converter with the type Ⅲ compensated error amplifier

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Fig. 2.  (a) Bode plot of $H(s)$. (b) Bode plot of $T(s)$

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Fig. 3.  System architecture of the proposed converter

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Fig. 4.  The schematic of the proposed EA

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Fig. 5.  (a) Frequency response of $T(s)$. (b) Frequency response of the proposed EA. (c) Frequency response of the control loop

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Fig. 6.  The micrograph of the test chip

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Fig. 7.  The measured steady waveform. (a) $V_{\rm OUT}=$ 0.6 V. (b) $V_{\rm OUT}=$ 3.4 V

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Fig. 8.  (a) The measured results of (a) the voltage-tracking response and (b) the load transient response

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Table 1.   Performance summary
[1]
Su F, Ki W H, Tsui C Y. Ultra fast fixed-frequency hysteretic buck converter with maximum charging current control and adaptive delay compensation for DVS applications. IEEE J Solid-State Circuits, 2008, 43(4):815 doi: 10.1109/JSSC.2008.917533
[2]
Lee Y H, Huang S C. Power-tracking embedded buck-boost converter with fast dynamic voltage scaling for the SoC system. IEEE Trans Power Electron, 2012, 27(3):1271 doi: 10.1109/TPEL.2010.2101085
[3]
Tan M, Zhou Q. A end-point prediction scheme with constant amplitude ramp signal suitable for high voltage applications. IEEE International Conference of Electron Devices and Solid-State Circuits (EDSSC), Chongqin, China, 2010 http://ieeexplore.ieee.org/document/5713748/
[4]
Chen H, Ma D. A fast-transient DVS-capable switching converter with Δ IL-emulated hysteretic control. Symposium on VLSI Circuits (VLSIC), Honolulu, America, 2011:282 http://ieeexplore.ieee.org/document/5713748/
[5]
Du M, Liu J. A 5-MHz 91% peak-power-efficiency buck regulator with auto-selectable peak-and valley-current control. IEEE J Solid-State Circuits, 2011, 46(8):1928 doi: 10.1109/JSSC.2011.2151470

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    Received: 26 September 2013 Revised: 10 November 2013 Online: Published: 01 May 2014

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      Article Navigation >  Journal of Semiconductors  > 2014  >  35(5): 055005
      Miao Yang, Baixue Zhang, Yun Cao, Fengfeng Sun, Weifeng Sun. A voltage-mode DC-DC buck converter with fast output voltage-tracking speed and wide output voltage range[J]. Journal of Semiconductors, 2014, 35(5): 055005. doi: 10.1088/1674-4926/35/5/055005 ****M Yang, B X Zhang, Y Cao, F F Sun, W F Sun. A voltage-mode DC-DC buck converter with fast output voltage-tracking speed and wide output voltage range[J]. J. Semicond., 2014, 35(5): 055005. doi: 10.1088/1674-4926/35/5/055005.
      Citation:
      Miao Yang, Baixue Zhang, Yun Cao, Fengfeng Sun, Weifeng Sun. A voltage-mode DC-DC buck converter with fast output voltage-tracking speed and wide output voltage range[J]. Journal of Semiconductors, 2014, 35(5): 055005. doi: 10.1088/1674-4926/35/5/055005 ****
      M Yang, B X Zhang, Y Cao, F F Sun, W F Sun. A voltage-mode DC-DC buck converter with fast output voltage-tracking speed and wide output voltage range[J]. J. Semicond., 2014, 35(5): 055005. doi: 10.1088/1674-4926/35/5/055005.
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      A voltage-mode DC-DC buck converter with fast output voltage-tracking speed and wide output voltage range

      DOI: 10.1088/1674-4926/35/5/055005
      • 1.

        The 55 th Research Institute of China Electronic Technology Group Corporation, Nanjing 210016, China

      • 2.

        National ASIC System Engineering Research Center, Southeast University, Nanjing 210096, China

      More Information
      • Corresponding author: Yang Miao, Email:yangmiao8623@163.com
      • Received Date: 2013-09-26
      • Revised Date: 2013-11-10
      • Published Date: 2014-05-01

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