Datasheet

-0.2
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0.2
0 1 2 3 4 5 6 7 8 9
Load Regulation - %
Output Current - A
C003
V
IN
= 5 V
V
IN
= 12 V
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10
Efficiency - %
Output Current - A
V
IN
= 5 V
V
IN
= 12 V
Test Setup and Results www.ti.com
Figure 2 shows the efficiency for the TPS56921EVM-188 using a semi-log scale to more easily show
efficiency at lower output currents. The ambient temperature is 25°C.
Figure 2. TPS56921EVM-188 Low Current Efficiency
The efficiency may be lower at higher ambient temperatures, due to temperature variation in the drain-to-
source resistance of the internal MOSFET.
2.3 Output Voltage Load Regulation
Figure 3 shows the load regulation for the TPS56921EVM-188.
Figure 3. TPS56921EVM-188 Load Regulation
Measurements are given for an ambient temperature of 25°C.
6
TPS56921EVM-188, 9-A, SWIFT™ Regulator Evaluation Module SLVU793–October 2012
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