Intel SC5299WS User Manual

2.5.8.14 

Timing Requirements 

The timing requirements for power supply operation are as follows. The output voltages must 
rise from 10% to within regulation limits (T

vout_rise

) within 5 to 70 ms, except for 5VSB, which is 

allowed to rise from 1.0 to 25 ms. The +3.3V, +5V and +12V output voltages should start to rise 
approximately at the same time. All outputs must rise monotonically. Each output voltage shall 
reach regulation within 50ms (T

vout_on

) of each other during turn on of the power supply. Each 

output voltage shall fall out of regulation within 400msec (T

vout_off

) of each other during turn off. 

The following table shows the timing requirements for the power supply being turned on and off 
via the AC input, with PSON held low and the PSON signal, with the AC input applied. 
 

Item 

Description 

MIN 

MAX 

Units 

T

vout_rise

 

Output voltage rise time from each main output. 

5.0

1

 70

1

 msec 

T

vout_on

 

All main outputs must be within regulation of each 
other within this time. 

 50 

msec 

T 

vout_off

 

All main outputs must leave regulation within this 
time. 

 400 

msec 

1. The 5VSB output voltage rise time shall be from 1.0 ms to 25 ms.

 

TP02313

V out

V1

V2

V3

V4

Tvout_on

Tvout_rise

10% V out

Tvout_off