Application Notes

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Adjusting the Output Voltage of the PTH03060W &

PTH05060W Wide-Output Adjust Power Modules

PTH03060W and PTH05060W products to a value higher

than 0.8 V. The adjustment range of the PT03060W

(5-V input) from 0.8 V to 3.6 V. For an output voltage

Table 1-1 gives the preferred value of the external resistor

for a number of standard voltages, along with the actual

output voltage that this resistance value provides.

For other output voltages the value of the required resistor

can either be calculated using the following formula, or

simply selected from the range of values given in Table 1-2.

Figure 1-1 shows the placement of the required resistor.

= 10 k

Ω ·

0.8 V

– 2.49 k

Ω

Notes:

1. Modules that operate from a 3.3-V input bus should

not be adjusted higher than 2.5 V.

2. Use a 0.1 W resistor. 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.

0.800

Open

0.825

318 k

Ω

0.850

158 k

Ω

0.875

104 k

Ω

0.900

77.5 k

Ω

0.925

61.5 k

Ω

0.950

50.8 k

Ω

0.975

43.2 k

Ω

1.000

37.5 k

Ω

1.025

33.1 k

Ω

1.050

29.5 k

Ω

1.075

26.6 k

Ω

1.100

24.2 k

Ω

1.125

22.1 k

Ω

1.150

20.4 k

Ω

1.175

18.8 k

Ω

1.200

17.5 k

Ω

1.225

16.3 k

Ω

1.250

15.3 k

Ω

1.275

14.4 k

Ω

1.300

13.5 k

Ω

1.325

12.7 k

Ω

1.350

12.1 k

Ω

1.375

11.4 k

Ω

1.400

10.8 k

Ω

1.425

10.3 k

Ω

1.450

9.82 k

Ω

1.475

9.36 k

Ω

1.50

8.94 k

Ω

1.55

8.18 k

Ω

1.60

7.51 k

Ω

1.65

6.92 k

Ω

1.70

6.4 k

Ω

1.75

5.93 k

Ω

1.80

5.51 k

Ω

1.85

5.13 k

Ω

1.90

4.78 k

Ω

1.95

4.47 k

Ω

698

Ω

3.309V

2.5 V

2.21 k

Ω

2.502 V

2 V

4.12 k

Ω

2.010 V

1.8 V

5.49 k

Ω

1.803 V

1.5 V

8.87 k

Ω

1.504 V

1.2 V

17.4 k

Ω

1.202 V

1 V

36.5 k

Ω

1.005 V

0.8 V

Open

0.8 V

PTH03060W & PTH05060W

Table 1-2; Output Voltage Set-Point Resistor Values

2.00

4.18 k

Ω

2.05

3.91 k

Ω

2.10

3.66 k

Ω

2.15

3.44 k

Ω

2.20

3.22 k

Ω

2.25

3.03 k

Ω

2.30

2.84 k

Ω

2.35

2.67 k

Ω

2.40

2.51 k

Ω

2.45

2.36 k

Ω

2.50

2.22 k

Ω

2.55

2.08 k

Ω

2.60

1.95 k

Ω

2.65

1.83 k

Ω

2.70

1.72 k

Ω

2.75

1.61 k

Ω

2.80

1.51 k

Ω

2.85

1.41 k

Ω

2.90

1.32 k

Ω

2.95

1.23 k

Ω

3.00

1.15 k

Ω

3.05

1.07 k

Ω

3.10

988

Ω

3.15

914

Ω

3.20

843

Ω

3.25

775

Ω

3.30

710

Ω

3.35

647

Ω

3.40

587

Ω

3.45

529

Ω

3.50

473

Ω

3.55

419

Ω

3.60

367

Ω

V

IN

C

IN

330 µF

(Required)

C

OUT

330 µF

(Optional)

GND

V

OUT

V

R

SET

0.1 W

1 %

PTH05060W

1

10

4

5

6

2

3

98

7