Technical Product Specification

Power Subsystem Intel® Server System R2000IP Product Family TPS
24 Revision 1.1
All outputs are measured with reference to the return remote sense signal (ReturnS). The +12V
and +5Vsb voltages are measured at the PDB output harness connector.
Table 17. Voltage Regulation Limits
Output
Tolerance
MIN
NOM
MAX
Units
+ 12V
± 5%
11.40
12.00
12.60
V
DC
+ 5Vsb
± 5%
4.75
5.00
5.25
V
DC
3.6.6 5Vsb Outputs
The 5Vsb output shall be present when an AC input is greater than the power supply turn on
voltage is applied.
3.6.7 Fan Operation in Standby Mode
The power supply fans shall continue to operate at their lowest speed when in standby mode.
3.6.8 Dynamic Loading
The output voltages shall remain within limits specified in Table 10 for the step loading and
capacitive loading. The load transient repetition rate shall be tested between 50Hz and 5 kHz at
duty cycles ranging from 10%-90%. The load transient repetition rate is only a test specification.
The  step load may occur anywhere within the MIN load to the MAX load shown in Voltage
regulation Limits Table.
Table 18. Transient Load Requirements
Output
Max  Step Load Size
Max Load Slew Rate
Test capacitive Load
+12V
40.0A
0.25 A/s
2000 F
+5VSB
0.5A*
0.25 A/s
20 F
Note: Doesn’t include fan transient.
3.6.9 Capacitive Loading
The power supply shall be stable and meet all requirements with the following capacitive loading
ranges.
Table 19. Capacitive Loading Conditions
Output
MIN
MAX
Units
+12V
2000
11,000
F
+5Vsb
20
350
F
3.6.10 Closed loop stability
The power supply shall be unconditionally stable under all line/load/transient load conditions
including capacitive load ranges. A minimum of 45 degrees phase margin and -10dB-gain
margin is required. The power supply manufacturer shall provide proof of the unit’s closed-loop