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  Direct Efficient DC/DC Conversion of 100V Inputs for Telecom/Automotive Supplies &mdash DN398
  PDF, 96 Kb, Datei veröffentlicht: Jun 14, 2007
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  Direct Efficient DC/DC Conversion of 100V Inputs for
  Telecom/Automotive Supplies – Design Note 398
  Greg Dittmer
  Introduction
  Automotive, telecom and industrial systems have harsh,
  unforgiving environments that demand robust electronic
  systems. In telecom systems the input rail can vary from
  36V to 72V, with transients as high as 100V. In automotive
  systems the DC battery voltage may be 12V, 24V or 42V
  with load dump conditions causing transients up to 60V
  or more. The LTCВ® 3810 is a current mode synchronous
  switching regulator controller that can directly step
  down input voltages up to 100V, making it ideal for these
  harsh environments. The ability to step down the high
  input voltage directly allows a simple single inductor
  topology, resulting in a compact high performance power
  supply—in contrast to the low side drive topologies that
  require bulky, expensive transformers. Feature-Rich Controller
  The LTC3810 drives two external N-channel MOSFETs
  using a synchronizable constant on-time, valley current
  mode architecture. A high bandwidth error amplifier
  provides fast line and load transient response. Strong
  1О© gate drivers minimize switching losses—often the …

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• Power Management > Switching Regulator > Step-Down (Buck) Regulators > High Input Voltage Buck | External Power Switch Buck Controllers

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LTC3810EGPBF, LTC3810EG PBF