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EPS2U Power Supply Design Guide, V2.1
6.5 Voltage Regulation
STATUS
Required
The power supply output voltages must 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 Section 5.8. All outputs
are measured with reference to the return remote sense (ReturnS) signal. The 5 V, 12V1, 12V2, 12V3, –12 V and
5 VSB outputs are measured at the power supply connectors referenced to ReturnS. The +3.3 V is measured at
its remote sense signal (3.3VS) located at the signal connector.
Table 18: Voltage Regulation Limits
Parameter MIN NOM MAX Units Tolerance
+3.3 V +3.20 +3.30 +3.46 V
rms
+5/-3%
+5 V +4.80 +5.00 +5.25 V
rms
+5/-4%
+12V1 +11.52 +12.00 +12.60 V
rms
+5/-4%
+12V2 +11.52 +12.00 +12.60 V
rms
+5/-4%
+12V3 +11.52 +12.00 +12.60 V
rms
+5/-4%
-12 V -11.40 -12.20 -13.08 V
rms
+9/-5%
+5 VSB +4.85 +5.00 +5.25 V
rms
+5/-3%
STATUS
Optional
Some system applications may require tighter regulation limits on the +5 V output. The optional regulation limits
are shown below.
Table 19: Optional +5V Regulation Limits
Parameter MIN NOM MAX Units Tolerance
+5 V +4.85 +5.00 +5.25 V
rms
+5/-3%
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