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PTH12020x

14

5

6

GND

GN D

10

9

8

7

GND

330 mF

PTH12020W/L

SLTS208E–MAY 2003–REVISED OCTOBER 2005

(1) A 0.05-W rated resistor may be used. The tolerance should be 1%, with temperature stability of 100 ppm/°C(or

better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 4 and 7

using dedicated PCB traces.

the stability of the regulator.

Table 4. Output Voltage Set-Point Resistor Values

PTH12020W

PTH12020L

1.200

Open

2.70

3.51 kΩ

0.800

Open

1.225

318.0 kΩ

2.75

3.34 kΩ

0.825

312.0 kΩ

1.250

158.0 kΩ

2.80

3.18 kΩ

0.850

152.0 kΩ

1.275

105.0 kΩ

2.85

3.03 kΩ

0.875

98.8 kΩ

1.300

78.2 kΩ

2.90

2.89 kΩ

0.900

72.1 kΩ

1.325

67.2 kΩ

2.95

2.75 kΩ

0.925

56.1 kΩ

1.350

51.5 kΩ

3.00

2.62 kΩ

0.950

45.5 kΩ

1.375

43.9 kΩ

3.05

2.50 kΩ

0.975

37.8 kΩ

1.400

38.2 kΩ

3.10

2.39 kΩ

1.000

32.1 kΩ

1.425

33.7 kΩ

3.15

2.28 kΩ

1.025

27.7 kΩ

1.450

30.2 kΩ

3.20

2.18 kΩ

1.050

24.1 kΩ

1.475

27.3 kΩ

3.25

2.08 kΩ

1.075

21.2 kΩ

1.50

24.8 kΩ

3.30

1.99 kΩ

1.100

18.8 kΩ

1.55

21.0 kΩ

3.35

1.90 kΩ

1.125

16.7 kΩ

1.60

18.2 kΩ

3.40

1.82 kΩ

1.150

15.0 kΩ

1.65

16.0 kΩ

3.50

1.66 kΩ

1.175

13.5 kΩ

1.70

14.2 kΩ

3.60

1.51 kΩ

1.200

12.1 kΩ

1.75

12.7 kΩ

3.70

1.38 kΩ

1.225

11.0 kΩ

1.80

11.5 kΩ

3.80

1.26 kΩ

1.250

9.91 kΩ

1.85

10.5 kΩ

3.90

1.14 kΩ

1.275

8.97 kΩ

1.90

9.61 kΩ

4.00

1.04 kΩ

1.300

8.13 kΩ

1.95

8.85 kΩ

4.10

939 Ω

1.325

7.37 kΩ

2.00

8.18 kΩ

4.20

847 Ω

1.350

6.68 kΩ

2.05

7.59 kΩ

4.30

761 Ω

1.375

6.04 kΩ

2.10

7.07 kΩ

4.40

680 Ω

1.400

5.46 kΩ

12