Hardware Reference
In-Depth Information
Appendix B
Power Standards
The following table references the standard ATX power supply voltages, regulation
(tolerance), and voltage ranges.
15
The values listed here for the +5 V and +3.3 V supplies are referenced in Chapter 2
of
Raspberry Pi Hardware Reference
(Apress, 2014) as a basis for acceptable power supply
ranges. When the BroadCom power specifications become known, they should be
used instead.
Supply
(Volts)
Ripple
(Peak to Peak)
Tolerance
Minimum
Maximum
+5 V
±5%
± 0.25 V
+4.75 V
+5.25 V
50 mV
-5 V
±10%
±0.50 V
-4.50 V
-5.50 V
50 mV
+12 V
±5%
±0.60 V
+11.40 V
+12.60 V
120 mV
-12 V
±10%
±1.2 V
-10.8 V
-13.2 V
120 mV
+3.3 V
±5%
±0.165 V
+3.135 V
+3.465 V
50 mV
+5 V
SB
±5%
±0.25 V
+4.75 V
+5.25 V
50 mV
