Intel SC5299WS User Manual

Table 58. Power Supply Module Load Ratings 

 

 

2.3.3.5 

Standby Output 

The 5VSB output is present when an AC input greater than the power supply turn-on voltage is 
applied.  

2.3.3.6 

Voltage Regulation 

The power supply output voltages stay within the following voltage limits when operating at 
steady state and dynamic loading conditions. These limits include the peak-peak ripple/noise 
specified in Table 61. All outputs are measured with reference to the GND. The +12V and 
+5VSB outputs are measured at the power distribution board output harness connector.   

Parameter 

Tolerance 

MIN 

NOM 

MAX 

Units 

+ 12V 

- 5%/+5% 

+11.40 

+12.00 

+12.60 

V

rms

 

+ 5VSB 

- 5%/+5% 

+4.75 

+5.00 

+5.25 

V

rms

 

 

2.3.3.7 

Dynamic Loading 

The output voltages remain within limits specified for the step loading and capacitive loading 
presented in the following table. The load transient repetition rate has been tested between 5 
Hz 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 between the MIN load and MAX load 

defined in the following table. 

Table 60. Transient Load Requirements 

Output 

Max    Step Load Size 

Max Load Slew Rate 

Test Capacitive Load 

12V 3.0 

A 

1

 

0.5 A/

  s 2200 

  F 

+5VSB 0.5 

A 

0.5 A/

  s 20 

  F 

Notes: 

1. 

Step loads on each 12V output may happen simultaneously. 

2. 

The +12V should be tested with 2200 

  F evenly split between the three +12V rails. 

650-W 

Voltage 

Min 

Max 

Peak 

+12 V 

0 A 

54 A 

58 A 

+5 VSB 

0.1 A 

3.0 A 

3.5 A