- 4 0

0

40

80

12 0

160

1. 2 4

1. 2 4 5

1. 2 5

1. 2 5 5

1. 2 6

1. 2 6 5

1. 2 7

1. 2 7 5

1. 2 8

Tj [

°C]

Vout [V ]

V in = 12V

Io ut= 1 0m A

Figure 2: Output Voltage Stability vs. Junction

Temperature

-4 0 -20

0

2 0

4 0

6 0

8 0 100 120 140 160

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

Tj [

°C]

4 .5V <V in<2 2V

Iout= 10m A

Figure 3: Line Regulation vs. Junction

Temperature

012

345

-5

-4

-3

-2

-1

0

1

2

3

4

5

Io u t [ A ]

Vin = 1 2 V

Tj = 2 5

° C

( P u lse d t e c h n iq ue ha s b e e n u s e d)

Figure 4: Load Regulation

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

0

1

2

3

4

5

6

7

8

(V in - Vou t) [V ]

O u tput C ur rent [A ]

Vin > 4.5V

T j = 125

°C

Pow er D is sip ation Lim it

Tc = 25

°C

P dm ax = 40W

C urr ent Lim itatio n

Tc = 70

°C

P dm ax = 22W

D C O perating A re a

Rdson

lim it

Figure 1: L4955 DC Operating Area

0

123

45

6

0

0. 2 5

0. 5

0. 7 5

1

1. 2 5

I out [ A ]

T j = 125

°C

Tj = 2 5

° C

Tj = - 4 0

° C

P u l s ed t e c h niq u e has b een us ed

Figure 5: Dropout Voltage

*P ulsed tecnique ha s been used

-4 0 -20

0

2 0

4 0

6 0

8 0

100 120 140 160

0

1

2

3

4

5

6

7

8

9

10

Tj [

°C]

O utp ut C urre n t [A]

(Vin-Vout) > 2 V

pin 2 = G ND

Figure 6: Maximum OutputCurrent vs. Junction

Temperaturewith internal current limiting

L4955

L4955

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