A 100MHz Eight-Phase Buck Converter Delivering 12A in 25mm2 Using Air-Core Inductors

@article{Schrom2007A1E,
  title={A 100MHz Eight-Phase Buck Converter Delivering 12A in 25mm2 Using Air-Core Inductors},
  author={Gerhard Schrom and Peter Hazucha and Fabrice Paillet and Dr. Timothy J Rennie and Seung Tae Moon and Donald S. Gardner and T. Kamik and Peng Sun and Thanh Tai Nguyen and Mandy J Hill and Kaladhar Radhakrishnan and T. Memioglu},
  journal={APEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition},
  year={2007},
  pages={727-730}
}
We present a 100MHz eight-phase synchronous buck converter using air-core inductors. The voltage regulator (VR) chip was manufactured in a 90nm CMOS process and mounted on a flip-chip test package together with surface-mount inductors and decoupling capacitors. The measured peak efficiency is 84.0% for Vin/Vout= 2.4V/1.5V and 79.3% for 2.4V/1.2V. The VR delivers a load current of 12A in an area of only 25mm2 and 2.5mm height. This is the first demonstration of a high-frequency VR with air-core… CONTINUE READING
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