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Reconfigurable, Switched-Capacitor Power Converter for IoT

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The IoT Physical Layer

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Abstract

This chapter introduces an efficient reconfigurable, multiple voltage gain switched-capacitor DC–DC buck converter as part of a power management unit for wearable IoTs. The switched-capacitor converter has an input voltage of 0.6–1.2 V generated from an energy harvesting source. The switched-capacitor converter utilizes pulse frequency modulation to generate multiple regulated output voltage levels, namely 1, 0.8 and 0.6 V based on two reconfigurable bits over a wide range of load currents from 10 \(\upmu \)A to 800 \(\upmu \)A. The switched-capacitor converter is designed and fabricated in 65 nm low-power CMOS technology and occupies an area of 0.493 mm\(^2\). The design utilizes a stack of MIM and MOS capacitances to optimize the circuit area and efficiency. The measured peak efficiency is 80\(\%\) at a load current of 800 \(\upmu \)A and regulated load voltage of 1 V.

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Acknowledgements

This work has been supported by the Semiconductor Research Corporation (SRC) under the Abu Dhabi SRC Center of Excellence on Energy-Efficient Electronic Systems (\(ACE^{4}S\)), Contract 2013 HJ2440, with funding from the Mubadala Development Company, Abu Dhabi, UAE.

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Authors and Affiliations

  1. Khalifa University, Abu Dhabi, UAE

    Dima Kilani, Mohammad Alhawari, Baker Mohammad, Hani Saleh & Mohammed Ismail

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  1. Dima Kilani
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  2. Mohammad Alhawari
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  3. Baker Mohammad
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  4. Hani Saleh
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  5. Mohammed Ismail
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Correspondence to Baker Mohammad .

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Editors and Affiliations

  1. Masdar Institute at Khalifa University, Abu Dhabi, United Arab Emirates

    Ibrahim (Abe) M. Elfadel

  2. Wayne State University, Detroit, MI, USA

    Mohammed Ismail

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Kilani, D., Alhawari, M., Mohammad, B., Saleh, H., Ismail, M. (2019). Reconfigurable, Switched-Capacitor Power Converter for IoT. In: Elfadel, I., Ismail, M. (eds) The IoT Physical Layer. Springer, Cham. https://doi.org/10.1007/978-3-319-93100-5_16

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  • DOI: https://doi.org/10.1007/978-3-319-93100-5_16

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-93099-2

  • Online ISBN: 978-3-319-93100-5

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