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  Versatile Buck-Boost Converter Offers High Efficiency in a Wide Variety of Applications &mdash LT Journal
  PDF, 1.3 Mb, Datei veröffentlicht: Jun 10, 2005
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  DESIGN FEATURES Versatile Buck-Boost Converter
  Offers High Efficiency in a Wide
  by Dave Salerno
  Variety of Applications
  Introduction L1 5ВµH Miniature hard disk drives are a popular storage medium for MP3 music п¬Ѓles,
  digital photographs and other data
  stowed in the latest portable electronics. Likewise lithium-ion batteries are
  popular for these same devices, which
  presents a minor problem in that mini
  disk drives typically require a 3.3V
  supply, which is right in the middle
  of the lithium-ion battery’s operating
  range (3.0V-to-4.2V). This requires a
  converter that can both step down a
  fully-charged Li-Ion battery and step
  up the same battery as it discharges
  to sub-3.3V levels.
  The LTC3442 is a 1.2A buck-boost
  converter that is ideal for mini disk
  drive applications, and certainly for
  other buck-boost appliations as well.
  The LTC3442 extends battery life with
  95% efп¬Ѓciency and п¬Ѓts into tight spaces …

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  Monolithic Buck-Boost Converter Provides 1A at 3.3V without Schottky Diodes &mdash LT Journal
  PDF, 76 Kb, Datei veröffentlicht: Sep 1, 2003
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  DESIGN IDEAS Monolithic Buck-Boost
  Converter Provides 1A at 3.3V
  by Mark Jordan
  without Schottky Diodes
  Introduction Inside the LTC3441
  The LTC3441 patented control technique provides smooth and continuous
  transfer from buck, buck-boost and
  boost modes while maintaining a
  constant frequency at no load. The
  operating frequency is factory set to
  1MHz and can be synchronized up to
  1.7MHz. For light loads, the part offers
  user controlled Burst Mode operation
  to maximize battery life, drawing only
  25ВµA of quiescent current. To limit
  inrush current at start-up, an external
  RC network can be connected to the
  SHDN/SS pin to control output voltage rise time.
  The LTC3441 is available in a small
  3mm by 4mm low thermal resistance
  12-lead DFN package. L1
  4.7ВµH 4
  9 …

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• Power Management > Switching Regulator > Buck-Boost Regulators > Internal Power Switch Buck-Boost

Andere Namen:

LTC3441EDETRPBF, LTC3441EDE TRPBF