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• 下载
  Linear Technology Magazine Circuit Collection, Volume IV &mdash AN84
  PDF, 2.4 Mb, 档案已发布: 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.
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  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 …

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  Low Noise LT1614 DC/DC Converter Delivers В–5V at 200mA from 5V Input &mdash LT Journal
  PDF, 221 Kb, 档案已发布: Aug 1, 1998
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  DESIGN IDEAS Low Noise LT1614 DC/DC Converter
  Delivers –5V at 200mA from 5V Input
  by Steve Pietkiewicz
  The inverting DC/DC converter
  function is traditionally realized with
  a capacitor-based charge pump.
  Although simple, the output impedances of the best charge pump
  solutions are in the 5Ω to 10Ω range,
  resulting in significant regulation
  issues when the load current
  increases beyond a few tens of milliamperes. The LT1614 inductor-based
  inverting DC/DC converter uses
  closed-loop regulation to obtain an
  output impedance of 0.1Ω, eliminating output voltage droop under load.
  Figure 1 details the 5V to –5V converter circuit. The LT1614 contains
  an internal 0.6Ω switch rated at 30V,
  C3
  1ВµF L1
  22ВµH VIN
  5V allowing up to 28V differential between
  input and output. Quiescent current
  is 1mA and the device contains a lowbattery detector with a 200mV
  reference voltage. The device switches …

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制造商分类

• Power Management > Switching Regulator > Inverting Regulators

其他名称:

LT1614IMS8PBF, LT1614IMS8 PBF