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Корпус / Упаковка / Маркировка

Параметры

Экологический статус

Другие варианты исполнения

LT1585 LT1585 LT1587 LT1587

Application Notes

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  Power for Pentium Processors; Meeting VRE Requirements &mdash AN63
  PDF, 145 Кб, Файл опубликован: 1 авг 1995
  This application note describes the design of both linear and switching regulators which provide power for 90MHz Pentium(r) processors. The circuits are intended to comply with Intel's modular power supply specification and provide sufficient power for cache RAM and chip sets in addition to the CPU. They are also capable of providing the additional power required by an upgrade "overdrive" processor.
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  Application Note 63
  August 1995
  Power for PentiumВ® Processors; Meeting VRE Requirements
  Craig Varga
  Introduction
  Providing power for the PentiumВ® microprocessor family is
  not a trivial task by any means. In an effort to simplify this
  task we have developed a new switching regulator control
  circuit and a new linear regulator to address the needs of
  these processors. Considerable time has been spent developing an optimized decoupling network. Here are several
  circuits using the new LTCВ®1266 synchronous buck regulator control chip and the LT В®1584 linear regulator to
  provide power for Pentium processors and Pentium VRE
  processors. The Pentium processor has a supply requirement of 3.3V В±5%. The Pentium VRE processor requires
  3.500V В±100mV.
  The circuits shown here are designed to supply worstcase specification voltages to the Pentium VRE processor
  over line, load, transient and temperature. At first glance
  it may seem that simpler circuits, such as 3-terminal
  regulators, can provide this function. Worst-case analysis
  shows the margin to be too small (or negative) to ensure
  adequate operation over a wide production range. The
  combination of tight tolerance, tight transient response
  and large production volumes requires designs with adequate margin to ensure proper operation over the
  product’s life. Failure of this circuit to provide proper …

Design Notes

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  LT1580 Fast Response Low Dropout Regulator Achieves 0.4 Dropout at 4 Amps &mdash DN119
  PDF, 100 Кб, Файл опубликован: 1 дек 1995
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  advertisement Fast Response Low Dropout Regulator Achieves 0.4 Dropout
  at 4 Amps – Design Note 119
  Craig Varga
  Low dropout regulators have become more common
  in desktop computer systems as microprocessor
  manufacturers have moved away from 5V only CPUs.
  A wide range of supply requirements exists today with
  new voltages just over the horizon. In many cases, the
  input-output differential is very small, effectively disqualifying many of the low-dropout regulators on the
  market today. Several manufacturers have chosen to
  achieve lower dropout by using PNP-based regulators.
  The drawbacks of this approach include much larger die
  size, inferior line rejection and poor transient response.
  Enter the LTВ®1580
  The new LT1580 NPN regulator is designed to make use
  of the higher supply voltages already present in most
  systems. The higher voltage source is used to provide
  power for the control circuitry and supply the drive
  current to the NPN output transistor. This allows the
  NPN to be driven into saturation, thereby reducing the
  dropout voltage by a VBE compared to a conventional
  design. Applications for the LT1580 include 3.3V to
  2.5V conversion with a 5V control supply, 5V to 4.2V …

Модельный ряд

Классификация производителя

• Power Management > LDO Linear Regulators > Positive Linear Regulators (LDO)

Варианты написания:

LT1584CT-3.45PBF, LT1584CT-3.45 PBF, LT1584CT3.45#PBF, LT1584CT 3.45#PBF