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Design of a PWM/PFM Buck DC-DC Converter with High Efficiency

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Advances in Electronic Engineering, Communication and Management Vol.1

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 139))

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Abstract

This paper presents a buck DC-DC converter with PWM and PFM mode which has high efficiency. The converter operates in PWM at nominal load current (>80mA) with the fixed switching frequency of 1 MHz, and enters PFM at light load current (<80mA). When entering PFM, the converter will shut down several modules to reduce quiescent current and make the switching frequency greatly declined. The chip was implemented using a TSMC 0.18um CMOS 1P3M mixed-signal process. As the simulation indicates, the converter can rapidly switch between PWM and PFM according to the load current, which is suitable for battery-support portable system.

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References

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Author information

Authors and Affiliations

  1. School of Electronic and Information, Tongji University, Shanghai, China

    Renji Wang, Zhigang Han & Jian Wu

Authors
  1. Renji Wang
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  2. Zhigang Han
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  3. Jian Wu
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Corresponding author

Correspondence to Renji Wang .

Editor information

Editors and Affiliations

  1. Researcher Association, Wuhan Section, International Science & Education, Special No.1, Jiangxia Road of Wuhan, Wuhan, China, People's Republic

    David Jin

  2. Researcher Association, Guangzhou Section, International Science & Education, Jinheng Road 144, Guangzhou, China, People's Republic

    Sally Lin

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© 2012 Springer-Verlag Berlin Heidelberg

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Wang, R., Han, Z., Wu, J. (2012). Design of a PWM/PFM Buck DC-DC Converter with High Efficiency. In: Jin, D., Lin, S. (eds) Advances in Electronic Engineering, Communication and Management Vol.1. Lecture Notes in Electrical Engineering, vol 139. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27287-5_49

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  • DOI: https://doi.org/10.1007/978-3-642-27287-5_49

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-27286-8

  • Online ISBN: 978-3-642-27287-5

  • eBook Packages: EngineeringEngineering (R0)

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