Honored Contributor
Honored ContributorPlease don't start new threads with the same questions.
http://www.alteraforum.com/forum/showthread.php?t=29904 I sent you links to power supply design documents. You have not provided details showing that you have investigated your design requirements properly. --- Quote Start --- My question is now, is it nessesarry to have the filter for VCCINT? --- Quote End --- The core supply of the FPGA does not need to be filtered. However, its transient response needs to be within specification. What is the maximum current on VCCINT this design is expected to operate with? What is the required transient response for a load-step of that load current (the data sheet will have the supply minimum and maximum requirements)? Can your supply meet that requirement? The load step response for the maximum current draw will be a dip in voltage that is determined by the equivalent series resistance of the capacitors you have selected. All of this is explained in those documents. You need to answer those same questions for your design. Cheers, Dave
