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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
  Dual PowerPathв„ў Controller Simplifi es Power Management &mdash DN160
  PDF, 78 Kb, File published: Aug 1, 1997
  Extract from the document

  Dual PowerPathв„ў Controller Simplifies Power Management
  Design Note 160
  Jaime Tseng
  As the demand for portable electronics with multiple
  batteries continues to grow, so does the need for simple
  and efficient solutions for switching between batteries. The LTC ®1473 simplifies the design of circuitry
  for switching between two batteries or a battery and
  an AC adapter. protection shuts off the gate drive when a fault condition exceeds the user-programmable time limit, inrush
  current limiting limits the current flowing into or out of
  the system bypass capacitor and a diode default mode
  allows power to flow from the highest potential until
  the inputs can be defined. The LTC1473 is designed to drive two sets of low loss,
  back-to-back N-channel MOSFET switches to route
  power where needed, typically to the input of the main
  system switching regulator. An internal micropower
  boost regulator supplies the gate drive for the N-channel
  MOSFET switches. Automatic Switchover Between Battery and AC
  Adapter
  A protected automatic switchover between a battery and
  a power source connected at DCIN can be constructed
  using the circuit in Figure 1. Under normal conditions,
  this circuit will route the voltage at DCIN to the output. The LTC1473 simplifies the designer’s task by incorporating a number of protection features. Short-circuit L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks
  and PowerPath is a of Linear Technology Corporation. All other trademarks are the …

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Manufacturer's Classification

• Monitor, Control and Protection > PowerPath Controllers & Ideal Diodes