Datasheet

STCS05A Application information
13/18
In this case V
DRAIN
= 12 - 3 x 3.6 = 1.2 V
P
D
= (1.2 - 0.1) x 0.35 + 12 x 0.5 x 10
-3
= 0.385 + 6 x 10
-3
= 391 mW
The junction temperature will be:
T
J
= 100 x 0.391 + 50 = 89 °C
For a correct operation of the chip, the junction temperature must not exceed 110 °C.
The following pictures show the maximum power dissipation according to the ambient
temperature:
Figure 16. Maximum power dissipation vs T
A
for SO-8
0.20
0.40
0.60
0.80
1.00
1.20
1.40
25 35 45 55 65 75 85 95 105 115 125
[°C]
R
thJA
= 100 [°C/W]
P
DMAX
= (T
JMAX
-T
A
)/R
thJA
P
DMAX
[W]
0.20
0.40
0.60
0.80
1.00
1.20
1.40
25 35 45 55 65 75 85 95 105 115 125
[°C]
R
thJA
= 100 [°C/W]
P
DMAX
= (T
JMAX
-T
A
)/R
thJA
P
DMAX
[W]