Upon reading through the Arria II Device Family Pin Connection Guideline document (PCG-01007-1.5), we noticed that only switcher power supplies are used in the power tree examples for the VCC (0.9V) supply (on page 10). Though the document does not explicitly state a switching regulators should be used for VCC, we have yet to see suggestions or examples for other kinds of supplies. We were wondering if that is the case and whether a linear regulator may be used in place of a switching supply. We are currently designing a board where we would like to minimize the amount of noise introduced to the system and we would like to use all linear regulators for our FPGA supplies.
Assuming the power load is low enough for a linear to supply, what are the repercussions of using a linear supply to derive our VCC (0.9V) supply?
Thank you
Assuming the power load is low enough for a linear to supply, what are the repercussions of using a linear supply to derive our VCC (0.9V) supply?
Thank you