SE7500CW2 Server Board Technical Product Specification General Specifications
99
Revision 1.40
9.5 Power Supply Specifications
This section provides power supply design guidelines for an Intel
®
Server Board SE7500CW2-
based system, including voltage and current specifications, and power supply on/off sequencing
characteristics.
Table 64. SE7500CW2 Static Power Supply Voltage Specification
Parameter Min Nom Max Units Tolerance
+3.3 V +3.25 +3.30 +3.35 V
rms
+1.5/-1.5%
+5 V +4.90 +5.00 +5.10 V
rms
+2/-2%
+12 V +11.76 +12.00 +12.24 V
rms
+2/-2%
-12 V -11.40 -12.20 -13.08 V
rms
+9/-5%
+5 VSB +4.85 +5.00 +5.20 V
rms
+4/-3%
Table 65. SE7500CW2 Dynamic Power Supply Voltage Specification
Output Min Max Tolerance
+3.3 V 3.20 V 3.46 V +5 / -3 %
+5 V 4.80 V 5.25 V +5 / -4 %
+12 V 11.52 V 12.6 V +5 / -4 %
+5 V SB 4.80 V 5.25 V +5/ -4%
9.5.1 Power Timing
This section discusses the timing requirements for operation with a single power supply. The
output voltages must rise from 10% to within regulation limits (T
vout_rise
) within 5 ms to 70 ms.
The +3.3 V, +5 V and +12 V output voltages start to rise approximately at the same time. All
outputs must rise monotonically. The +5 V output must be greater than the +3.3 V output during
any point of the voltage rise, however, never by more than 2.25 V. Each output voltage shall
reach regulation within 50 ms (T
vout_on
) of each other and begin to turn off within 400 ms
(T
vout_off
) of each other. The following figure shows the output voltage timing parameters.
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