Datasheet
TP4 /
TP19
TP3 /
TP18
MetalGroundBarrel
Probe Tip
TipandBarrelVoutripple
measurement
Network
Analyzer
Isolation
Transformer
FAN
V1
+
-
A1
-
+
V
VIN
LOAD1
3.3V @
1.5A
-
+
V2
+
-
LOAD2
1.2V @
2.5A
+
-
V3
-+
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Test Set UP
Figure 3. Output Ripple Measurement – Tip and Barrel using TP3 and TP4 or TP18 and TP19
Figure 4. Control Loop Measurement Setup
4.3 Start Up / Shut Down Procedure
1. Increase V
IN
from 0V to 12Vdc
9
SLVU356–January 2010 Using the TPS54291EVM-431 A 12V Input, 3.3V 1.5A and 1.2V 2.5A
Synchronous Buck Converter
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