Datasheet Linear Technology LT1587CM-3.3#PBF

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Design Notes

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  Dual Regulators Power PentiumВ® Processor or Upgrade CPU &mdash DN122
  PDF, 73 Kb, File published: Feb 1, 1996
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  advertisement Dual Regulators Power Pentium Processor or Upgrade CPU
  Design Note 122
  Craig Varga
  Many manufacturers of Pentium processor-based
  motherboards have been searching for an economical
  solution to the problem of powering the present generation Pentium P54C and accommodating the upgrade
  processors that will soon become available. The existing
  processor uses a single supply for both the processor
  core and the I/O. For the highest frequency offerings,
  the supply required is 3.5V ±100mV (VRE specification).
  For the lower performance end of the clock frequency
  spectrum, a supply voltage of 3.3V В±5% is adequate.
  Recently, Intel respecified the standard 3.3V CPUs for
  operation at 3.5V. This allows designs for any clock
  frequency to be operated from a single 3.5V supply. The
  I/O ring and chipset should be powered by the same
  voltage as the CPU core, whether that is 3.3V or 3.5V.
  The P55C upgrade processor, which will soon be available, requires separate supplies for the core and the I/O.
  The nominal core voltage is targeted at 2.500V В±5%,
  whereas the I/O supply is still nominally 3.3V. There is
  also a processor pin, VCC2DET, at location AL1, that is
  bonded to ground on the P55C, but is open on the P54C.
  A signiп¬Ѓcant complication is introduced by the core …

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Manufacturer's Classification

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

Other Names:

LT1587CM-3.3PBF, LT1587CM-3.3 PBF, LT1587CM3.3#PBF, LT1587CM 3.3#PBF