Datasheet Linear Technology LT3471

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Design Notes

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  Tiny, Highly Flexible, Dual Boost/Inverter Tracks Supplies &mdash DN357
  PDF, 516 Kb, File published: Jan 10, 2004
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  Tiny, Highly Flexible, Dual Boost/Inverter Tracks Supplies
  Design Note 357
  Jeffrey Huang
  Introduction
  Linear Technology’s LT®3471 is a space saving and
  extremely versatile dual switching regulator available
  in a tiny 3mm Г— 3mm DFN package. With a 2.4V to
  16V input range, the device can easily implement any
  combination of boost, inverting and SEPIC topologies
  to generate two positive and/or negative outputs up to
  В±40V. It can readily make the two output voltages track
  each other with minimal additional circuitry, or it can
  independently regulate the outputs, thus saving space
  by replacing two separate ICs. Either way, the LT3471
  fits into tight spaces and is easily adaptable for a wide
  range of applications.
  LT3471 Features
  The LT3471 combines two independent, in-phase, 1.3A,
  42V switches with error amplifiers that can sense to
  ground, providing boost and inverting capabilities.
  Both inputs of each error amplifier are available as high
  impedance feedback pins with a typical bias current
  of only 60nA. An accurate 1.00V reference is also pin …

Articles

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  Dual Switching Converter Provides Two Outputs of Any Polarity &mdash LT Journal
  PDF, 284 Kb, File published: Sep 1, 2005
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  DESIGN IDEAS Dual Switching Converter Provides
  Two Outputs of Any Polarity by Jesus Rosales
  Op amps, CCD imagers, LCDs,
  medical diagnostic equipment and
  a host of other circuits require dual
  power supplies. Both supplies may be
  positive, both negative, or they may
  be opposite polarity. Dual supplies
  are implemented in a variety of ways,
  including using two converters, tapping off the switch with capacitors and
  diodes, or using multi-winding transformers. Each of these solutions adds
  unnecessary cost, size and complexity,
  especially now that there is a simple,
  single device solution available with
  the LT3471.
  Simplicity and versatility are
  two features that are often at odds
  in the world of switching regulators—simplicity usually means fewer
  components; versatility more. The
  LT3471 turns this idea on its head by
  offering a versatile feature set with a
  minimal number of components in a
  dual-output converter. …

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Manufacturer's Classification

• Power Management > Switching Regulator > Inverting Regulators | LCD/CCD/OLED Bias | SEPIC Regulators
• Power Management > Switching Regulator > Step-Up (Boost) Regulators > Internal Power Switch Boost | Multiple Output Boost
• Power Management > PMIC & Multifunction > Multitopology DC/DC