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Load Step
60A to 0A
60A to 10A
60A to 20A
60A to 30A
60A to 40A
60A to 50A
60A to 60A
Measured Loadline Calculator
Current
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
Loadline Slope
Spec
1.500 mOhms
Measured*
-1.600 mOhms
/$% 0HDVXUHPHQWV
Vdmm
1.666 V
Vscope
1.671 V
Delta V
-0.005 V
Vfb_nl
1.666 V
Vfb_nf
1.570 V
Vnlo
-0.034 V
Vst
-0.130 V
Vso
0.096 V
Delta Vs
0.009 V
50
Transient Max (mV) at pins AC14/AC15
Current
0
10
20
30
40
50
60
Spec'd Socket Loadline
Min
-50
-57
-65
-72
-80
-87
-95
-103
-110
-118
-125
-133
-140
-148
-155
Vso is the Static Offset Voltage of the board under test.
Optimally for Pentium 4 processor in the 478-pin package
and Northwood processor designs this should be -25mV.
Delta Vs is used as a correction factor to position the
offset to the optimal offset of -25mV, This Normalizes the
loadline. See section 3.1.1.4 of the Voltage Load Line
Validation - Desktop Platforms for more information.
To observe the actual loadline for the board under test
set Delta Vs = 0 V.
Measurement
110.00
95.00
78.00
64.00
49.00
34.00
20.60
Static and Transient
Max
0
-8
-15
-23
-30
-38
-45
-53
-60
-67
-75
-83
-90
-97
-105
IMPORTANT NOTES
Units
mV
mV
mV
mV
mV
mV
mV
Nominal
-25
-33
-40
-47
-55
-63
-70
-77
-85
-92
-100
-108
-115
-123
-130
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