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Output Voltage Requirements
The platform processor decoupling design incorporates fifteen 560 µF Aluminum-
polymer bulk capacitors and forty four 10 µF 1206 package ceramic high-frequency
capacitors per processor for a 6 layer board, thirteen 560 µF Aluminum-polymer bulk
capacitors and forty four 10 µF 1206 package ceramic high-frequency capacitors per
processor for a 8 layer board and seventeen 560 µF Aluminum-polymer bulk capacitors
and fifty four 10 µF 0805 package ceramic high-frequency capacitors per processor for
a 8 layer board (Table 2-8). At least nine of the 10 µF capacitors should be placed in the
cavity of the processor socket. The remaining capacitors can be placed under the
processor socket on the backside of the baseboard. The 560 µF capacitors should be
placed along the sides of the processor socket, as close to the socket as the keep-out
zones allow and on the south east side of the processor socket where the bulk of the
power pins are located.
Figure 2-7. Six-layer Dual-Core Intel Xeon Processor-Based Server Platform VccP Power
Delivery Impedance Model Path with 1206 Size Caps
Figure 2-8. Eight-layer Dual-Core Intel Xeon Processor-Based Server Platform VccP
Power Delivery Impedance Model Path with 1206 Size Caps
Figure 2-9. Eight-layer Dual-Core Intel Xeon Processor-Based Server Platform VccP
Power Delivery Impedance Model Path with 0805 Size Caps
Socket and Package
0.33m
20 pH
PWL
90 uF8400 uF
VR
0.4m
134 pH
0.40m
267 pH
9 X 10 uF
MLCC 1206
15 X 560 uF
Aluminum-Polymer
350 uF
0.09m
34 pH
35 X 10 uF
MLCC 1206
Motherboard
VR
Sense
Point
0.51m
58 pH
30A to 130A
1000A/uS
Socket and Package
0.33m
20 pH
PWL
90 uF7280 uF
VR
0.4m
134 pH
0.46m
307 pH
9 X 10 uF
MLCC 1206
13 X 560 uF
Aluminum-Polymer
0.37m54 pH
350 uF
0.09m
34 pH
35 X 10 uF
MLCC 1206
Motherboard
VR
Sense
Point
30A to 130A
1000A/uS
Socket and Package
0.33m
20 pH
PWL
90 uF9520 uF
VR
1.1m
122 pH
0.41m
235 pH
9 X 10 uF
MLCC 0805
17 X 560 uF
Aluminum-Polymer
0.43m
54 pH
450 uF
0.22m
25 pH
45 X 10 uF
MLCC 0805
Motherboard
VR
Sense
Point
30A to 130A
1000A/uS