L4949N datasheet(4/8 Pages) ONSEMI

Part #	L4949N

Description	MULTIFUNCTION VERY LOW DROPOUT VOLTAGE REGULATOR

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L4949

4

MOTOROLA ANALOG IC DEVICE DATA

0

100

150

200

250

0.1

100

Iout, OUTPUT CURRENT (mA)

10

1.0

50

TJ = 25°C

0

0.10

0.20

0.30

0.40

–40

–20

0

40

60

20

100

120

TJ, JUNCTION TEMPERATURE (°C)

80

Iout = 50 mA

Iout = 10 mA

Iout = 100 mA

3.0

2.5

2.0

1.5

1.0

0.1

1.0

10

100

0.5

0

VCC = 14 V

TJ = 25°C

Iout, OUTPUT CURRENT (mA)

3.0

2.5

2.0

1.5

1.0

0

5.0

10

15

20

25

30

VCC, SUPPLY VOLTAGE (V)

0.5

0

RL = 5.0 k

RL = 100 Ω

TJ = 25°C

Figure 3. Dropout Voltage versus

Output Current

Figure 4. Dropout Voltage versus

Junction Temperature

Figure 5. Quiescent Current versus

Output Current

Figure 6. Quiescent Current versus

Supply Voltage

TYPICAL CHARACTERIZATION CURVES (continued)

6.0

5.0

4.0

3.0

2.0

4.0

4.1

Vout, OUTPUT VOLTAGE (V)

1.0

0

Resistor 10 k

from Reset Output

to 5.0 V

TJ = 25°C

4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

5.0

4.7

4.66

4.62

4.58

4.5

–40

–20

TJ, JUNCTION TEMPERATURE (°C)

4.46

4.42

Upper Threshold

0

20

40

60

80

100

120

4.54

Lower Threshold

Figure 7. Reset Output versus

Regulator Output Voltage

Figure 8. Reset Thresholds versus

Junction Temperature

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