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LTC3727-1 LTC3727-1

Konstruktionshinweise

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  Active Voltage Positioning Reduces Output Capacitors &mdash Design Solutions 10
  PDF, 130 Kb, Datei veröffentlicht: Nov 1, 1999
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  Design Solutions 10
  November 1999
  Active Voltage Positioning Reduces Output Capacitors
  by Robert Sheehan
  INTRODUCTION
  Power supply performance, especially transient response,
  is key to meeting today’s demands for low voltage, high
  current microprocessor power. In an effort to minimize
  the voltage deviation during a load step, a technique that
  has recently been coined “active voltage positioning” is
  generating substantial interest and gaining popularity in
  the portable computer market. The benefits include lower
  peak-to-peak output voltage deviation for a given load
  step, without having to increase the output filter capacitance. Alternatively, the output filter capacitance can be
  reduced while maintaining the same peak-to-peak transient response.
  BASIC PRINCIPLE
  The term “active voltage positioning” (AVP) refers to
  setting the power supply output voltage at a point that is
  dependent on the load current. At minimum load, the
  output voltage is set to a slightly higher than nominal level.
  At full load, the output voltage is set to a slightly lower than
  nominal level. Effectively, the DC load regulation is
  degraded, but the load transient voltage deviation will be …

Artikel

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  PolyPhase Switching Now Available for High Output Voltage Telecom, Automotive and Industrial Power Supplies &mdash LT Journal
  PDF, 142 Kb, Datei veröffentlicht: Dec 1, 2002
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  DESIGN IDEAS PolyPhase Switching Now Available
  for High Output Voltage Telecom,
  Automotive and Industrial
  Power Supplies
  by Eric Gu
  Introduction 1
  0.1ВµF
  180pF
  20k
  1% 2
  105k
  1% 1000pF 3
  4
  5 7
  8
  1000pF 9 33pF SENSE1 + TG1 SENSE1 – SW1 VOSENSE1 BOOST1 PLLFLTR VIN
  BG1 PLLIN EXTVCC FCB
  LTC3727
  ITH1
  SGND INTVCC
  PGND L1
  15ВµH PGOOD 27 10
  11 1000pF 12 20k …

Modellreihe

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

Andere Namen:

LTC3727EGPBF, LTC3727EG PBF