DS692 Datasheet, PDF (3/41 Pages) Xilinx, Inc – Radiation-Hardened

Radiation-Hardened, Space-Grade Virtex-5QV FPGA Data Sheet: DC and AC Switching Characteristics
Power-On Power Supply Requirements
Xilinx® FPGAs require a certain amount of supply current during power-on to insure proper device initialization. The actual
current consumed depends on the power-on ramp rate of the power supply.
The required power-on sequence is V_CCINT, V_CCAUX, and V_CCO. The I/O remains 3-stated through power-on if the required
power-on sequence is followed. Xilinx does not specify the current or I/O behavior for other power-on sequences.
Table 5 shows the minimum current required by the Virtex-5QV device for proper power-on and configuration.
If the current minimums shown in Table 5 are met, the device powers on properly after all three supplies have passed
through their power-on reset threshold voltages.
The FPGA must be configured after V_CCINT is applied.
Once initialized and configured, use the Xilinx Power tools to estimate current drain on these supplies.
The required power-down sequence is V_CCO, V_CCAUX, and V_CCINT.
Table 5: Power-On Current for the Virtex-5QV Device
Device
XQR5VFX130
I_CCINTMIN
See I_CCINTQ in Table 4
I_CCAUXMIN
I_CCAUXQ + 40
I_CCOMIN
I_CCOQ + 80
Units
mA
Table 6: Power Supply Ramp Time
Symbol
Description
V_CCINT
V_CCO
V_CCAUX
Internal supply voltage relative to GND
Output drivers supply voltage relative to GND
Auxiliary supply voltage relative to GND
Ramp Time
0.20 to 50.0
0.20 to 50.0
0.20 to 50.0
Units
ms
ms
ms
DS692 (v1.3.1) January 16, 2015
Product Specification
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