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LT1374 LT1374

Application Notes

• Download
  Linear Technology Magazine Circuit Collection, Volume IV &mdash AN84
  PDF, 2.4 Mb, File published: Apr 1, 2000
  Application Note 84 is a collection of "power circuits" from the years 1996 through 1998 as seen in the pages of Linear Technology magazine. This Application Note collects circuits that can output tens of amps to circuits that can operate a handheld device for several years. In addition to a wide variety of traditional power supply circuits (Buck, Boost, Inverting, Flyback, Linear Regulators, etc.) we include circuits for charging batteries, several Power Management circuits as well as circuits that highlight a very low noise switching regulator.
  Extract from the document

  Application Note 84
  April 2000 Linear Technology Magazine Circuit Collection, Volume IV
  Power Products
  Richard Markell, Editor
  INTRODUCTION
  Application Note 84 is the fourth in a series that excerpts
  useful circuits from Linear Technology magazine to preserve them for posterity. This application note highlights
  “power” circuits from issue VI:1 (February 1996) through
  issue VIII:4 (November 1998). Another application note
  will feature data conversion, interface and signal processing circuits from the same era. Like its predecessor, AN 66,
  this Application Note includes circuits that can power
  most any system you can imagine, from “server” power
  supplies that generate in excess of 50 amps to micropower systems for portable and handheld equipment.
  Also included are power converters that can be voltage programmed using Intel’s VID code. Charge pump converters, linear regulators and battery charger circuits are
  included here, with Li-Ion batteries receiving extra attention. There are, of course, circuits that cannot be so simply
  categorized. Come browse. I’ll get out of the way and let
  the authors describe their creations.
  Note: Article Titles appear in this application note exactly
  as they originally appeared in Linear Technology magazine. This may result in some inconsistency in the usage
  of terminology. TABLE OF CONTENTS
  Introduction . 1
  REGULATORS—SWITCHING (BUCK)
  New LTCВ®1435–LTC1439 DC/DC Controllers Feature Value and Performance . 4 …

Design Notes

• Download
  A High Efficiency 500kHz, 4.5A Step-Down Converter in an SO-8 Package &mdash DN181
  PDF, 80 Kb, File published: May 2, 1998
  Extract from the document

  advertisement A High Efficiency 500kHz, 4.5A Step-Down Converter in an
  SO-8 Package – Design Note 181
  Karl Edwards
  Reducing board space and improving efficiency are key
  requirements in many systems, especially at higher currents, where component size and power losses generally
  increase. Linear Technology has addressed these issues
  with the new LTВ®1374, a 500kHz, 4.5A monolithic buck
  converter designed to meet the needs of higher current
  applications. The LT1374 contains the power switch,
  logic, oscillator and all the control circuitry necessary
  to make a compact, high efficiency buck converter. The
  topology is current mode for fast transient response
  and good loop stability, with the added benefit of full
  cycle-by-cycle current limit.
  The device is available in three package options: SO-8,
  DD and TO-220. For the most space-sensitive applications, the SO-8 retains the full 4.5A switch rating and
  is ideal for medium power applications with high peak
  loads. The DD package is intended for surface mount
  applications with continuous high current; the TO-220
  is for high power, high ambient temperature systems.
  A switching frequency of 500kHz allows the use of small,
  low value surface mount components to reduce board
  area. To further reduce power consumption, the LT1374 …

Model Line

Manufacturer's Classification

• Power Management > Switching Regulator > SEPIC Regulators
• Power Management > Switching Regulator > Step-Down (Buck) Regulators > Internal Power Switch Buck