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CPU voltage regulator integration

Discussion in 'Electronic Design' started by Jamie M, May 14, 2013.

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  1. Jamie M

    Jamie M Guest

    Hi,

    Apparently some new Intel CPU's are being tested with on board voltage
    regulators (2.4V input buck converters for CPU power rails). Whats
    really surprising is these voltage regulators include the power mosfets
    and also the inductors, and possibly even the capacitors I'm not sure!

    The efficiency right now is only about 80% for the on die regulator,
    which might be a deal killer I'd say, plus it is eating up expensive
    real estate on the CPU die, and adding heat. But I wonder how long
    until IR.com has a programmable one of these on their site?

    Here are the links to the story and a pdf of the technology:

    http://hardware.slashdot.org/story/13/05/13/2249209/intels-haswell-moves-voltage-regulator-on-die

    http://www.psma.com/sites/default/f...ully-integrated-silicon-voltage-regulator.pdf

    cheers,
    Jamie
     
  2. Jasen Betts

    Jasen Betts Guest

    80% is not a big deal, the current crop of intel CPUs have tiny
    heatsinks, and low heastsink clamping force compared to 4 years
    ago. They can't be producing much heat to start with. Another
    20% isn't going to be a big deal.
     
  3. rickman

    rickman Guest

    That sounds a lot like the Enpirion technology. They have been selling
    switchers for a number of years that include on die magnetics. I agree
    that it seems an odd duck to want to include in the CPU package much
    less on the die.
     
  4. Guest

    maybe that is because it is a test chip?, it says 90nm, the processor
    they used is 65nm. don't know if it is even possible to do all the
    thick metal and magnetic layers in the process used for the CPU

    the e7330 they used is already two processor dies in one package
    I believe that is what they call a special software that can put
    maximum load on all parts of the chip at the same time

    -Lasse
     
  5. josephkk

    josephkk Guest

    Cute. I expect that the shebang is more in package rather than completely
    on chip. More likely the regulator is on chip but the switch, inductor,
    and caps are in package. I'll bet it runs at some several MHz.

    ?-)
     
  6. Guest

    it's right there in the presentation, it is a separate chip but
    switches and inductors are on chip and it is programmable between
    30 and 140MHz

    -Lasse
     
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