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AR# 31754

Platform Flash XL - What is my power requirement for the VDDQ supply?

Description

There are no numbers for the current draw on the Iddq supply in the Platform Flash XL. 

What current draw should I budget for on this supply in my Power System?

Solution


The current requirements depend on board design.

It is mainly determined based on the K operating frequency, loading of data output pins, and the data pattern. 
 
We recommend a 200 mA budget for VDDQ [+VPP] in the ~3.3V I/O range.

VPP is recommended to be connected to VDDQ on the board, and this value covers both VDDQ and VPP. 
 
The above number is a worst case estimate for a single XCF128X connected to a single Virtex-5 FPGA as shown in the data sheet schematic operating at 3.6V and 50 MHz with a worst-case data pattern.
AR# 31754
Date Created 10/01/2008
Last Updated 10/17/2014
Status Active
Type General Article
Devices
  • Configuration Solutions
Tools
  • ISE