-4 0 - 2 0

0

2 0

4 06 08 0 1 0 0 1 2 0 1 4 0 1 6 0

0. 4

0. 6

0. 8

1

1. 2

1. 4

1. 6

1. 8

2

2. 2

2. 4

2. 6

Tj [

° C]

Iq [m A ]

V in= 12V

Io ut = 1 0m A

t o

5 A

Figure 8: Quiescent Current vs. Temperature

(CL = 0V)

1k

1 0

100

10 k

10 0k

0

10

20

30

40

50

60

70

80

90

10 0

F r e q u enc y [ H z ]

R i p p le R e je c t io n [d B ]

C in = 22uF

C out = 2 2 u F

Vo u t = 1 . 2 6 V

Vin m in = 4 . 5 V

Io u t = 5 A

V r ipple = 3V p- p

V r ipple = 0 . 5V p - p

Figure 12: Ripple Rejection vs. Frequency

* P u ls e d tec n i qu e h a s been us ed

- 4 0

- 20

0

2 0

4 0

6 0

8 0

1 0 0 12 0 1 40 160

0

0.5

1

1.5

2

2.5

3

3.5

Tj [

°C]

S h o r t- c irc u it C u rre n t [A ]

R lim = 4 7 k

Ω

R lim = 1 3 k

Ω

R lim = 1 9 k

Ω

Figure 7: Short-circuit Current vs. Junction

Temperature with Programmable

Current Limiting

0

5

1 0

15

20

2 5

0

0. 5

1

1. 5

2

2. 5

3

3. 5

4

4. 5

5

Vi n [ V ]

Iq [ m A ]

Io = 1 0 m A t o 5 A

Tj= 2 5

° C

Tj= 1 2 5

° C

Tj= - 4 0

° C

Figure 9: Quiescent Current vs. Supply voltage

(CL = 0V)

Tj = 25

°C

0

5

10

15

20

25

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

Vin [V]

Iq [mA]

Rli m = 13k

Ω

Rlim = 47k

Ω

Figure 10: Quiescent Current vs. Supply Voltage

with Programmable Current Limiting

0

5

10

15

20

2 5

0

50

100

150

200

250

300

350

400

Vin [V ]

Iq [u A ]

Tj= 2 5

°C

Figure 11: Stand-by Current vs. Supply Voltage

with INH = LOGIC HIGH

L4955

L4955

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