Intel ATX 3.0 User Manual

Electrical
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4.2 DC Output - REQUIRED
4.2.1 DC Voltage Regulation – REQUIRED
The DC output voltages are required to remain within the regulation ranges shown in
Table 4-2
, when measured at the load end of the output connectors under all line,
load, and environmental conditions specified in Chapter 7.
The lower voltage range for 12V is allowed to be -7% to allow for the power excursion
requirements now described in Section 3.1
. To compensate for these power
excursions the nominal voltage could be changed to 12.1 or 12.2 Volts, depending on
Power Supply design.
Table 4-2: DC Output Voltage Regulation
Output Range Min Nom Max Unit
+12V1DC
2
+5% / -7% +11.20 +12.00 +12.60 V
+12V2DC
2
+5% / -7% +11.20 +12.00 +12.60 V
+5VDC ±5% +4.75 +5.00 +5.25 V
+3.3VDC ±5% +3.14 +3.30 +3.47 V
-12VDC
3
±10% -10.80 -12.00 -13.20 V
+5VSB ±5% +4.75 +5.00 +5.25 V
NOTES:
1. Voltage tolerance is required at all connectors
2. +12V1DC and +12V2DC requirement applies to all +12V power rails
3. -12VDC output is optional
4.2.2 DC Output Current – REQUIRED
The below table summarizes the expected output transient step sizes for each output.
All items in the below table are REQUIRED, unless specifically called out as
RECOMMENDED.
Table 4-3: DC Output Transient Step Sizes
Output
Maximum Step Size
(% of rated output amps)
Maximum Step Size
(A)
+12V1DC
4
40% (Required)
70% (Recommended)
-
+12V2DC
4
85% of CPU supported in Table 2-1
2
-
+12V3/4
4
Steps from 100%  300%
30%  100%
3
+5VDC 30% -
+3.3VDC 30% -

Intel ATX 3.0 Specifications

General

Brand	Intel
Model	ATX 3.0
Category	Computer Hardware
Language	English