Datasheet

Power Dissipation
2-4
2.3 Power Dissipation
The low junction-to-case thermal resistance of the PWP package, along with
well designed board layout, allows the TPS54980EVM-022 EVM to output full
rated load current while maintaining safe junction temperatures. With a 3.3-V
input source and a 9-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 dissipaton is shown for an input voltage
of 3.3 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
2.5
3
3.5
4
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− Power Dissipation − W
P
D
I
O
− Output Current − A
POWER DISSIPATION
vs
OUTPUT CURRENT
V
I
= 3.3 V