Equation 1. Output Voltage Adjust

R

=10k

x

SET

W

0.8V

-R

k

S

W

V

-V

O

min

(1)

PTH12060W/L

www.ti.com .................................................................................................................................................... SLTS217H – MAY 2003 – REVISED DECEMBER 2008

Use Equation 1 to calculate the adjust resistor value. See Table 2 for parameters, RS and Vmin.

Table 2. Adjust Equation Parameters

Parameter

PTH12060W

PTH12060L

Vmin (V)

1.2

0.8

Vmax (V)

5.5

1.8

RS (kΩ)

1.82

7.87

Table 3. Output Voltage Set-Point Resistor Values

PTH12060W

PTH12060L

VO (V)

RSET (kΩ)

VO(V)

RSET (kΩ)

VO(V)

RSET (kΩ)

1.20

Open

2.70

3.51

0.80

Open

1.225

318

2.75

3.34

0.825

312

1.25

158

2.80

3.18

0.85

152

1.275

105

2.85

3.03

0.875

98.8

1.30

78.2

2.90

2.89

0.90

72.1

1.325

62.2

2.95

2.75

0.925

56.1

1.35

51.5

3.0

2.62

0.95

45.5

1.375

43.9

3.05

2.5

0.975

37.8

1.40

38.2

3.10

2.39

1.0

32.1

1.425

33.7

3.15

2.28

1.025

27.7

1.45

30.2

3.20

2.18

1.05

24.1

1.475

27.3

3.25

2.08

1.075

21.2

1.50

24.8

3.30

1.99

1.10

18.8

1.55

21

3.35

1.9

1.125

16.7

1.60

18.2

3.40

1.82

1.15

15

1.65

16

3.50

1.66

1.175

13.5

1.70

14.2

3.60

1.51

1.20

12.1

1.75

12.7

3.70

1.38

1.225

11

1.80

11.5

3.80

1.26

1.25

9.91

1.85

10.5

3.90

1.14

1.275

8.97

1.90

9.61

4.0

1.04

1.30

8.13

1.95

8.85

4.10

0.939

1.325

7.37

2.0

8.18

4.20

0.847

1.35

6.68

2.05

7.59

4.30

0.761

1.375

6.04

2.10

7.07

4.40

0.680

1.40

5.46

2.15

6.6

4.50

0.604

1.425

4.93

2.20

6.18

4.60

0.533

1.45

4.44

2.25

5.8

4.70

0.466

1.475

3.98

2.30

5.45

4.80

0.402

1.50

3.56

2.35

5.14

4.90

0.342

1.55

2.8

2.40

4.85

5.0

0.285

1.60

2.13

2.45

4.58

5.10

0.231

1.65

1.54

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