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Thibault - owner in transition on LPF

(laser newbie) Anyone familiar with the power regulation circuits used in processors?

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Aug 27, 2010
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Greetings! Long time reader, long time PC repair technician and mad scientist; first time laser DIY.

Just checking to see if anybody is familiar with the power regulation daughterboard of Intel's Slot2 processors- They accept 5/12V input, and are rated for output up to 50W of super-clean 1.5V-2.8V (maybe more, digitally adjustable... as per PIII and Xeon spec) for those processors.

I've got some here in front of me, they look super nice :) But I'll have to figure out the exact I/O syntax... But Slot2 Xeons (make sure and get 5/12v type) are a dime-a-dozen.

pentium3xeon866ds.jpg

(PCB on standoffs above CPU die)

Of great note: Pinout is CLEARLY stenceled on the back. Input, output, enable, OK, +, (-) and everything :)

Addendum: After exhaustive searching, I can't find Lucent's spec sheet, or anything on the small chip on the bottom- 24-pin DIP:
FP96AD
RA3906
REVB
 
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I've found some Sharp voltage regulators in a laser printer, and I'm sure there are plenty of LM### on motherboards and such.

the daughterboard looks like tiny smd inductors and smd mosfets to me. Dunno what's under the sticker, but the other chip may just be a programmable pic
 


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