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LTC3733-1

Notas de Diseño

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  3-Phase LTC3733 Provides High Performance Power Solutions for AMD Opteron and Athlon 64 Processors &mdash DN326
  PDF, 90 Kb, Archivo publicado: nov 2, 2003
  Extracto del documento

  advertisement High Performance Power Solutions for AMD Opteron
  and Athlon 64 Processors – Design Note 326
  Henry J. Zhang and Wei Chen
  Introduction
  AMD Opteron and Athlon 64 CPUs can draw 65A at very
  low voltages (0.8V to 1.55V). Such high currents put efficiency and related thermal issues at the top of a power
  supply designer’s list of problems. The new LTC ®3733
  PolyPhaseВ® synchronous buck controller solves these
  problems, and others, by enabling solutions that offer
  high efficiency, low profile and fast transient response. inductor size. The LTC3733’s integrated MOSFET drivers
  also simplify the design and minimize the overall supply
  footprint. The LTC3733 directly senses the inductor
  current of each phase to achieve excellent current
  sharing among phases, thus evenly distributing the
  thermal stress. As a result, overdesign of the MOSFETs
  and inductors is unnecessary and the circuit can be
  operated reliably without a heat sink. The total size and
  cost of the solution is minimized. The LTC3733 is a 3-phase current mode controller that
  drives three synchronous buck stages 120В° out of phase.
  The three out-of-phase stages inherently self-cancel the
  current ripple and thus minimize the size of the input
  and output capacitors. Likewise, ripple cancellation
  and a high switching frequency (up to 600kHz) make it …

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Clasificación del fabricante

• Power Management > Switching Regulator > Digitally Programmable Regulators

Otros nombres:

LTC3733CGPBF, LTC3733CG PBF