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LT1370

Notas de Diseño

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  The LT1370: A 500kHz, 6A Monolithic Boost Converter &mdash DN183
  PDF, 78 Kb, Archivo publicado: jul 1, 1998
  Extracto del documento

  advertisement A 500kHz, 6A Monolithic Boost Converter – Design Note 183
  Karl Edwards Circuit Description
  The LT1370 is a current mode switcher. This means that
  switch duty cycle is directly controlled by the switch
  current rather than by the output voltage. This technique has several advantages: immediate response to
  input voltage variations, greatly simplified closed-loop
  frequency compensation, and pulse-by-pulse current
  limiting, which provides maximum switch protection.
  An internal low dropout regulator provides a 2.3V supply
  to all control circuitry. This low dropout design allows
  the input voltage to vary from 2.7V to 30V with virtually
  no change in device performance. An internal 500kHz
  oscillator is the basic clock for all timing. A bandgap
  provides the reference for the feedback error amplifier.
  As with the LT1371, error amplifier circuitry allows the
  LT1370 to directly regulate negative output voltages.
  The NFB pin regulates at –2.48V, while the amplifier’s
  output internally drives the FB pin to 1.245V. The error
  amplifier is a current output (gm) type, so its output
  voltage, present on the VC pin, can be externally clamped
  to lower the current limit. A capacitor-coupled external
  clamp provides soft start.
  The S/S pin has two functions: synchronization and …

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Clasificación del fabricante

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

Otros nombres:

LT1370HVIRPBF, LT1370HVIR PBF