J. Semicond. > 2008, Volume 29 > Issue 10 > 1956-1962
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A PWM/Pseudo-PFM Auto-Mode-Applied Buck DC/DC Switching Regulator

Liu Lianxi, Yang Yintang and Zhu Zhangming

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Abstract: A buck DC/DC switching regulator is implemented by automatically altering the modulation mode according to the load current that ranges from 0.01 to 3A.The pseudo-PFM mode is applied when duty cycle is less than 20%,and the PWM mode is selected in a range of duty cycle from 20% to 100%.The average conversion efficiency of the regulator is about 90% when the output current varies.The proposed dual-mode-control die is implemented in a 0.5μm DPDM CMOS mixed-signal process and a power p-MOSFET is used in the chip by hybrid integration.

Key words: pulse-width-modulation, pseudo-pulse-frequency-modulation, duty cycle, hybrid integrated

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    Received: 18 August 2015 Revised: 19 June 2008 Online: Published: 01 October 2008

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      Article Navigation >  Journal of Semiconductors  > 2008  >  29(10): 1956-1962
      Liu Lianxi, Yang Yintang, Zhu Zhangming. A PWM/Pseudo-PFM Auto-Mode-Applied Buck DC/DC Switching Regulator[J]. Journal of Semiconductors, 2008, In Press. Liu L X, Yang Y T, Zhu Z M. A PWM/Pseudo-PFM Auto-Mode-Applied Buck DC/DC Switching Regulator[J]. J. Semicond., 2008, 29(10): 1956.Export: BibTex EndNote
      Citation:
      Liu Lianxi, Yang Yintang, Zhu Zhangming. A PWM/Pseudo-PFM Auto-Mode-Applied Buck DC/DC Switching Regulator[J]. Journal of Semiconductors, 2008, In Press.

      Liu L X, Yang Y T, Zhu Z M. A PWM/Pseudo-PFM Auto-Mode-Applied Buck DC/DC Switching Regulator[J]. J. Semicond., 2008, 29(10): 1956.
      Export: BibTex EndNote
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      A PWM/Pseudo-PFM Auto-Mode-Applied Buck DC/DC Switching Regulator

      • Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices of the Ministry of Education, Institute of Microelectronics,Xidian University,Xi'an 710071,China

      • Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices of the Ministry of Education, Institute of Microelectronics,Xidian University,Xi'an 710071,China

      • Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices of the Ministry of Education, Institute of Microelectronics,Xidian University,Xi'an 710071,China

      • Received Date: 2015-08-18
      • Accepted Date: 2008-05-09
      • Revised Date: 2008-06-19
      • Published Date: 2008-11-11

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