Power Dissipation
2-4
2.3
Power Dissipation
The low junction-to-case thermal resistance of the PWP package, along with
a good board layout, allows the TPS54373EVM–237 EVMs to output full rated
load current while maintaining safe junction temperatures. With a 3.3-V input
source and a 3-A load, the junction temperature is approximately 60
°
C, while
the case temperature is approximately 55
°
C. The total circuit losses at 25
°
C
are shown in Figure 2–3. Power dissipation is shown for input voltages of 3.3 V
and 5.0 V. For additional information on the dissipation ratings of the devices,
see the individual product data sheets.
Figure 2–3. Measured Circuit Losses
0
0.5
1
1.5
2
0
0.5
1
1.5
2
2.5
3
3.5
4
– Power Dissipation – W
P
D
POWER DISSIPATION
vs
OUTPUT CURRENT
IO – Output Current – A
VI = 5 V
VI = 3.3 V
Summary of Contents for TPS54373EVM-237
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