Figure 5. Forward voltage drop versus forward current

(typical values)

0.1

1.0

10.0

100.0

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

VF(V)

IF(A)

Tj = 125 °C

Tj = 75 °C

Tj = 150 °C

Tj = -40 °C

Tj = 25 °C

Figure 6. Normalized avalanche power derating versus

pulse duration (Tj = 125 °C)

P

(tp)

P

(10 µs)

ARM

ARM

0.001

0.01

0.1

1

1

10

100

1000

t (µs)

p

Figure 7. Thermal resistance junction to ambient versus copper surface under tab (typical values, epoxy

printed board FR4, eCu = 35 µm) (PSMC (TO-277A))

0

20

40

60

80

100

120

0

1

2

3

4

5

6

7

8

9

10

SCu(cm²)

Rth(j-a) (°C/W)

PSMC (TO-277A)

STPS1045SFY

Characteristics (curves)

DS12668 - Rev 1

page 4/11