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AR# 20877

Virtex-4, Data Sheet - What is the POR current when Vccaux is powered after Vcco (Vcco first)

Description

Page 5 of the Virtex-4 FPGA Data Sheet: DC and Switching Characteristics data sheet (DS302) describes the following:

"VCCAUX and VCCO can power on at any ramp rate. Power supplies can be turned on in any sequence, though VCCAUX must powered on before or with VCCO for the specifications shown in Table 5. Xilinx does not specify the current when VCCAUX is not powered on first."

Several customers have asked, "What is the current if Vcco is powered first?"

Solution

For the time being, please use 2X as an estimate.
AR# 20877
Date Created 01/08/2010
Last Updated 12/15/2012
Status Active
Type General Article