Newbie Question (Board Design with 3 altera startix devices)

[Bajaj]

Hello,
I am Totally Newbie at board design and I am designing board with 3 altera parts (EP1s80F1508). I have following questions

1. one 3.3v@3A volatge reg. is enough for all three Parts? (VCCIO)
2. I am using three 1.5v@3A voltage reg. (one for each part). I really
need three? or one is ok
3. For main power to board i am using following switching power supply
https://www.cui.com/adtemplate.asp?invky=6554

Please look at the attached Page and let me know is everything ok??

Thanks In Advance
Bajaj

 

[Git]

Re: Newbie Question (Board Design with 3 altera startix devi

One regulator for the 1.5V will be fine. I would add some 10nF caps on regulator inputs and outputs, and also a link so that you can check the supplies are correct before you connect them to the fpga. Xilinx ISE has a utility (XPower?) which can give a good estimate of the required current of each supply.

Git

 

[Bajaj]

Re: Newbie Question (Board Design with 3 altera startix devi

Thanks for reply
How you add a link? you mean jumper at output??

 

[C8H10N4O2]

Re: Newbie Question (Board Design with 3 altera startix devi

One regulator (of sufficient power) is usually fine. However, keep in mind that each regulator acts as a low pass filter to isolate noise between the chips. So as long as you have enough noise suppression and don't find your self with lots of noise induced glitches you should be fine with just one regulator.