Datasheet

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 TPS54380EVM-001 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
I
O
– Output Current – A
V
I
= 5 V
V
I
= 3.3 V