Using coupled inductors to enhance transient performance of multi-phase buck converters

  title={Using coupled inductors to enhance transient performance of multi-phase buck converters},
  author={Jieli Li and A. Stratakos and Arturo E. Schultz and C. Sullivan},
  journal={Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04.},
  pages={1289-1293 vol.2}
Motivated by modern microprocessors' demand for high-current, low-voltage power with large transient load steps, a scalable multi-phase coupled inductor buck circuit is presented which delivers 80 A at 1.2 V from a 12 V input. 4-phase coupling and 1 MHz per-phase switching frequency enable the use of 50 nil per-phase leakage inductance so that the system is capable of supporting 15%-to-full-to-15% load transient steps with a 72 mV output voltage window using only a small bank of MLCC output… CONTINUE READING
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Publications referenced by this paper.
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  • A. M. Schultz, C. R. Sullivan
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2 Excerpts

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Method for making magnetic components with N - phase coupling , and related inductor structures ” , U . S . Patent , pending , Volterra Semiconductor Corp . 1293

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