www.ti.com

APPLICATION INFORMATION

ADJUSTING THE OUTPUT VOLTAGE

C

330 F

(Optional)

O

m

GND

V

O

V Sense

O

R

,1%

SET

PTH12030x

1, 3, 7

13

6

8, 9

12

1 1

5

GND

Adjust

VO

Sense

10

GND

GND

NOTES

PTH12030W/L

SLTS211F – MAY 2003 – REVISED FEBRUARY 2007

5.5 V for the W-suffix modules, and 0.8 V to 1.8 V for L-suffix modules. The adjustment method requires the

the actual output voltage that this resistance value provides. For other output voltages the required resistor can

either be calculated using Equation 1, or simply selected from the range of values given in Table 3. Figure 9

shows the placement of the required resistor.

PTH12030W

PTH12030L

5 V

280

Ω

5.009 V

N/A

N/A

3.3 V

2 k

Ω

3.294 V

N/A

N/A

2.5 V

4.32 k

Ω

2.503 V

N/A

N/A

2 V

8.06 k

Ω

2.01 V

N/A

N/A

1.8 V

11.5 k

Ω

1.081 V

130

Ω

1.8 V

1.5 V

24.3 k

Ω

1.506 V

3.57 k

Ω

1.499 V

1.2 V

Open

1.2 V

12.1 k

Ω

1.201 V

1.1 V

N/A

N/A

18.7 k

Ω

1.101 V

1 V

N/A

N/A

32.4 k

Ω

0.999 V

0.9 V

N/A

N/A

71.5 k

Ω

0.901 V

0.8 V

N/A

N/A

Open

0.8 V

Connect the resistor directly between pins 5 and 7, as close to the regulator as possible, using dedicated

PCB traces.

pin affects the stability of the regulator.

8

Submit Documentation Feedback