Datasheet

Efficiency
2-3
Test Setup and Results
2.2 Efficiency
The SLVP213 efficiency peaks at a load current of about 2 A and then
decreases as the load current increases to full load. The efficiency shown in
Figure 2−2 is for 5-V (TPS54610, TPS54810) and 3.3-V (TPS54910) inputs
at an ambient temperature of 25°C. The efficiency is lower at higher ambient
temperatures due to temperature variation in the drain-to-source resistance
of the MOSFETs. The efficiency is slightly lower at 700 kHz than at lower
switching frequencies due to the gate and switching losses in the MOSFETs.
Figure 2−2. Measured Efficiency
50
55
60
65
70
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80
85
90
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100
012345678910
TPS54910
TPS54610
TPS54810
Efficiency − %
EFFICIENCY
vs
OUTPUT CURRENT
I
O
− Output Current − A