Intel ATX12V manual DC Output, Catastrophic Failure Protection, DC Voltage Regulation

ATX12V Power Supply Design Guide

Version 2.0

3.1.5. Catastrophic Failure Protection

Should a component failure occur, the power supply should not exhibit any of the following:

•Flame

•Excessive smoke

•Charred PCB

•Fused PCB conductor

•Startling noise

•Emission of molten material

3.2.DC Output

3.2.1. DC Voltage Regulation

The DC output voltages shall remain within the regulation ranges shown in Table 2 when measured at the load end of the output connectors under all line, load, and environmental conditions. The voltage regulation limits shall be maintained under continuous operation for any steady state temperature and operating conditions specified in Section 5.

Table 2. DC Output Voltage Regulation

Output	Range	Min.	Nom.	Max.	Unit
+12V1DC	±5%	+11.40	+12.00	+12.60	Volts
+12V2DC (1)	±5%	+11.40	+12.00	+12.60	Volts
+5VDC	±5%	+4.75	+5.00	+5.25	Volts
+3.3VDC (2)	±5%	+3.14	+3.30	+3.47	Volts
-12VDC	±10%	-10.80	-12.00	-13.20	Volts
+5VSB	±5%	+4.75	+5.00	+5.25	Volts

(1)At +12 VDC peak loading, regulation at the +12 VDC output can go to ± 10%.

(2)Voltage tolerance is required at main connector and S-ATA connector (if used).

11