Intel
®
Entry Server Chassis SC5299-E TPS Power Sub-system
Revision 3.1
Intel order number D37594-005
37
ground return. The current in any remote sense line is less than 5 mA to prevent voltage
sensing errors. The power supply operates within specification over the full range of voltage
drops from the power supply’s output connector to the remote sense points.
2.2.4.13 Standby Output
The 5VSB output is present when an AC input greater than the power supply turn on voltage is
applied.
2.2.4.14 Voltage Regulation
The power supply output voltages are within the following voltage limits when operating at
steady state and dynamic loading conditions. These limits include the peak-peak ripple/noise.
All outputs are measured with reference to the return remote sense signal (ReturnS). The 5V,
12V1, 12V2, –12V and 5VSB outputs are measured at the power supply connectors referenced
to ReturnS. The +3.3V is measured at its remote sense signal (3.3VS) located at the signal
connector.
Table 40. Voltage Regulation Limits
Parameter Tolerance MIN NOM MAX Units
+ 3.3V - 5%/+5% +3.14 +3.30 +3.46 V
rms
+ 5V - 5%/+5% +4.75 +5.00 +5.25 V
rms
+ 12V1 - 5%/+5% +11.40 +12.00 +12.60 V
rms
+ 12V2 - 5%/+5% +11.40 +12.00 +12.60 V
rms
- 12V - 5%/+9% -11.40 -12.00 -13.08 V
rms
+ 5VSB - 5%/+5% +4.75 +5.00 +5.25 V
rms
2.2.4.15 Dynamic Loading
The output voltages are within limits specified for the step loading and capacitive loading
specified in the following table. The load transient repetition rate is tested between 50Hz and
5kHz at duty cycles ranging from 10%-90%. The step load may occur anywhere between the
MIN load and MAX load conditions.
Table 41. Transient Load Requirements
Output Step Load Size (see
note 2)
Load Slew Rate Test Capacitive Load
+3.3VDC 5.0A
0.25 A/ sec
250 F
+5V
4.0A 0.25 A/ sec 400 F
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