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75
80
85
90
95
100
0 1 2 3 4 5
I - Output Current - A
O
Efficiency - %
V = 6 V
I
V = 9 V
I
V = 12 V
I
V = 15 V
I
V = 17 V
I
V = 3.3 V,
f = 700 kHz
O
S
2.3 Output Voltage Regulation
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
Load Regulation - %
V = 17 V
I
V = 9 V
I
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
I - Output Current - A
O
V = 15 V
I
V = 6 V
I
V = 12 V
I
Test Setup and Results
Figure 1. Measured Efficiency, TPS54550
The output voltage load regulation of the TPS54550EVM-158 is shown in Figure 2 ; the output voltage line
regulation is shown in Figure 3 . Measurements are given for an ambient temperature of 25°C.
Figure 2. Load Regulation
4 TPS54550EVM-158 SWIFT™ Regulator Evaluation Module SLVU151 – March 2006
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