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Application Notes

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  Linear Technology Magazine Circuit Collection, Volume IV &mdash AN84
  PDF, 2.4 Мб, Файл опубликован: 1 апр 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 …

Design Notes

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  Ultralow Quiescent Current DC/DC Converters for Light Load Applications &mdash DN142
  PDF, 84 Кб, Файл опубликован: 1 ноя 1996
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  Ultralow Quiescent Current DC/DC Converters for
  Light Load Applications – Design Note 142
  Sam Nork 2-Cell to 5V Conversion with IQ = 12ОјA
  The circuit in Figure 1 produces a regulated 5V output
  from a 2V to 5V input and consumes only 12ОјA (typical) of supply current. The LTCВ®1516 is a charge pump
  DC/DC converter that uses Burst ModeВ® operation to
  provide a regulated 5V output.
  This circuit achieves ultralow quiescent current by
  disabling the internal charge pump when the output is
  in regulation. The charge pump is enabled only when
  the output load forces the voltage on COUT to droop by
  approximately 80mV. External capacitors C1 and C2
  are then used to transfer charge from VIN to VOUT until
  the output climbs back into regulation. This regulation
  method results in approximately 100mV of voltage
  ripple at the output. VIN = 2V TO 5V 2 + 10ОјF 3 + 10ОјF 4 The low quiescent current of the LTC1516 may render
  shutdown of the 5V supply unnecessary because the
  12ОјA quiescent current is lower than the self-discharge
  rate of many batteries. However, the part is also equipped
  with a 1ОјA shutdown mode for additional power savings.
  Ultralow Quiescent Current (IQ < 5ОјA)
  Regulated Supply
  The LTC1516 contains an internal resistor divider that …

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Классификация производителя

• Power Management > Inductorless (Charge Pump) DC/DC Converters > Regulated Step-Up Charge Pumps

Варианты написания:

LTC1516IS8PBF, LTC1516IS8 PBF