Datasheet Linear Technology LTC3425

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Design Notes

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  4-Phase Monolithic Synchronous Boost Converter Delivers 2.5A with Output Disconnect in a 5mm x 5mm QFN Package &mdash DN332
  PDF, 99 Kb, File published: Mar 1, 2004
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  advertisement 4-Phase Monolithic Synchronous Boost Converter Delivers 2.5A
  with Output Disconnect in a 5mm Г— 5mm QFN Package
  Design Note 332
  David Salerno
  Introduction
  The LTC®3425 is the industry’s first 4-phase, monolithic
  synchronous boost converter. It can start up with as little
  as 1V and operate with inputs up to 4.5V. The output
  voltage range is 2.4V to 5.25V, making it well suited
  for battery-powered applications as well as point-ofload regulation in low voltage systems. The 4-phase
  architecture allows for an effective switching frequency
  of up to 8MHz, which in turn reduces output ripple current and peak inductor current by a factor of four (over
  an equivalent single-phase circuit). This allows the use
  of small, low cost, low profile inductors and ceramic
  capacitors even at high load currents. With 5A peak current capability and an effective switch
  RDS(ON) of 40mО© (NMOS) and 50mО© (PMOS), the
  LTC3425 is capable of efficiently delivering 2.5A load
  current from a 0.8mm maximum profile, 32-pin 5mm
  Г— 5mm QFN package.
  Multiple Operating Modes Optimize Performance
  in Different Applications
  The LTC3425 can be configured for automatic Burst
  ModeВ® operation, п¬Ѓxed frequency mode with forced …

Articles

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  Multiphase Power Conversion for Portable and Point-of-Load Boost Applications &mdash LT Journal
  PDF, 395 Kb, File published: Sep 1, 2003
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  LINEAR TECHNOLOGY SEPTEMBER 2003 IN THIS ISSUE…
  COVER ARTICLE
  Multiphase Power Conversion
  for Portable and Point-of-Load
  Boost Applications.1
  David Salerno Issue Highlights .2
  LTCВ® in the News .2
  DESIGN FEATURES
  CompactPCIВ® Hot Swapв„ў
  Controller with I2Cв„ў Interface,
  Bus Precharge and On-Chip
  LOCAL_PCI_RESET# Logic.6
  Victor Fleury Low Noise, Micropower
  Precision Op Amp Swings
  Outputs from Rail to Rail .10
  Kris Lokere and Glen Brisebois Addressable Bus Buffer Provides
  Capacitance Buffering, Live
  Insertion and Nested Addressing
  in 2-Wire Bus Systems .13
  John Ziegler Versatile Hot Swap Controller
  with Open Circuit Detect, Foldback
  Current Limiting and Much More .17
  Mark Belch Micropower SOT-23 Boost with …

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Manufacturer's Classification

• Power Management > Switching Regulator > Step-Up (Boost) Regulators > Micropower Boost | Internal Power Switch Boost