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  Dual Output Buck Regulator with Current Partitioning Optimizes Efficiency in Space-Sensitive Applications &mdash DN460
  PDF, 79 Kb, Datei veröffentlicht: Feb 24, 2009
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  Dual Output Buck Regulator with Current Partitioning
  Optimizes Efficiency in Space-Sensitive Applications
  Design Note 460
  Johan Strydom
  Introduction
  The LTC ®3546 is a dual output current mode buck regulator with flexible output current partitioning. Beyond
  the advantages normally associated with dual output
  regulators (reduced size, cost, EMI and part count, with
  improved efficiency), the LTC3546’s outputs can be
  partitioned for either 3A and 1A outputs, or two 2A outputs. This increases its application range and simplifies
  multiple supply rail designs. A configurable Burst Mode®
  clamp for each output sets the current transition level
  between Burst Mode operation and forced continuous
  conduction mode to optimize efficiency over the entire
  output range. An adjustable switching frequency up to
  4MHz and internal power MOSFET switches allow for
  small and compact footprints. The adjustable switching frequency can be set from
  750kHz to 4MHz by an external resistor or synchronized
  to an external clock, allowing for a significant reduction in
  overall solution size through the reduction of the output
  capacitors and inductors. Furthermore, the 180 degree
  phase shift between outputs reduces input ripple current
  when compared with two independent regulators, as the …

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• Power Management > Switching Regulator > Step-Down (Buck) Regulators > Multiple Output Buck | Internal Power Switch Buck

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LTC3546EUFDTRPBF, LTC3546EUFD TRPBF