Datasheet Linear Technology LT3800 — Ficha de datos

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Notas de Diseño

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  High Voltage Current Mode Step-Down Converter with Low Power Standby Capability &mdash DN383
  PDF, 126 Kb, Archivo publicado: dic 22, 2005
  Extracto del documento

  High Voltage Current Mode Step-Down Converter with Low
  Power Standby Capability – Design Note 383
  Jay Celani
  Introduction
  Low power standby requirements are typically associated with battery-powered systems. Automotive systems, for example, commonly require power supplies to
  maintain output voltage regulation even under no-load
  conditions—while drawing minimal quiescent current to
  preserve battery life. Rising energy costs, however, have
  extended the need for low current standby operation to
  line-powered systems, such as small plugged-in appliances for home and business. converter requires few external components, maintains
  high conversion efficiencies over a wide load range and
  supports low power standby operation for compliance
  with system power-management requirements.
  High Efficiency at Standby
  The LT3800 is a 4VIN to 60VIN, 200kHz п¬Ѓxed-frequency
  controller that uses synchronous operation and N-channel
  MOSFETs to maximize high current efficiency. Current
  mode operation with continuous high-side inductor current sensing yields fast transient response and excellent
  line regulation. Low current standby requirements are met
  using Burst ModeВ® operation. A reverse inductor current
  inhibit feature also increases efficiency during light-load
  conditions. The LT3800 runs directly from the converter
  input supply, so there are no local supplies required to …

Artículos

• Descargar
  High Voltage Step-Down Synchronous Controller Offers Single-Supply Operation, Current Mode Control, and 100µA Burst Mode Operation &mdash LT Journal
  PDF, 533 Kb, Archivo publicado: marzo 25, 2005
  Extracto del documento

  DESIGN FEATURES High Voltage Step-Down Synchronous
  Controller Offers Single-Supply
  Operation, Current Mode Control,
  and 100ВµA Burst Mode Operation
  by Jay Celani Introduction
  As more features and functions are
  packed into electronics packages, efficient step-down DC/DC conversion
  circuits that can handle high input
  voltages at substantial load currents
  are increasingly necessary. This is
  especially true for distributed power
  systems that have high power point
  of load requirements. The LT3800 is
  a feature-packed high voltage synchronous step-down controller that
  simplifies meeting these high power
  requirements.
  The LT3800 is the core of singlesupply DC/DC converter solutions
  that require few external components
  and maintain high-efficiencies over
  wide load ranges. Burst Mode operation and a reverse inductor current
  inhibit feature maximize efficiencies
  during light-load and no-load conditions, making the LT3800 ideal
  for use in applications with supply …

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Clasificación del fabricante

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