www.ti.com
SLTS211F – MAY 2003 – REVISED FEBRUARY 2007
Use
to calculate the adjust resistor value. See
for parameters, R
S
and V
min
.
Equation 1. Output Voltage Adjust
0.8 V
- R
S
k
W
V
O
- V
min
Table 2. Adjust Equation Parameters
PARAMETERS
PTH12030W
1.2 V
5.5 V
1.82 kΩ
PTH12030L
0.8 V
1.8 V
7.87 kΩ
V
min
R
SET
= 10 k
W
x
(1)
V
max
R
s
Table 3. Output Voltage Set-Point Resistor Values
PTH12030W
V
OUT
1.2
1.225
1.25
1.275
1.3
1.325
1.35
1.375
1.4
1.425
1.45
1.475
1.5
1.55
1.6
1.65
1.7
1.75
1.8
1.85
1.9
1.95
2
2.05
2.1
2.15
2.2
2.25
2.3
2.35
2.4
2.45
2.5
2.55
2.6
2.65
R
SET
Open
318 kΩ
158 kΩ
105 kΩ
78.2 kΩ
62.2 kΩ
51.5 kΩ
43.9 kΩ
38.2 kΩ
33.7 kΩ
30.2 kΩ
27.3 kΩ
24.8 kΩ
21 kΩ
18.2 kΩ
16 kΩ
14.2 kΩ
12.7 kΩ
11.5 kΩ
10.5 kΩ
9.61 kΩ
8.85 kΩ
8.18 kΩ
7.59 kΩ
7.07 kΩ
6.6 kΩ
6.18 kΩ
5.8 kΩ
5.45 kΩ
5.14 kΩ
4.85 kΩ
4.58 kΩ
4.33 kΩ
4.11 kΩ
3.89 kΩ
3.7 kΩ
V
OUT
2.7
2.75
2.8
2.85
2.9
2.95
3
3.05
3.1
3.15
3.2
3.25
3.3
3.35
3.4
3.5
3.6
3.7
3.8
3.9
4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5
5.1
5.2
5.3
5.4
5.5
R
SET
3.51 kΩ
3.34 kΩ
3.18 kΩ
3.03 kΩ
2.89 kΩ
2.75 kΩ
2.62 kΩ
2.50 kΩ
2.39 kΩ
2.28 kΩ
2.18 kΩ
2.08 kΩ
1.99 kΩ
1.9 kΩ
1.82 kΩ
1.66 kΩ
1.51 kΩ
1.38 kΩ
1.26 kΩ
1.14 kΩ
1.04 kΩ
939
Ω
847
Ω
761
Ω
680
Ω
604
Ω
533
Ω
466
Ω
402
Ω
342
Ω
285
Ω
231
Ω
180
Ω
131
Ω
85
Ω
41
Ω
V
OUT
0.8
0.825
0.85
0.875
0.9
0.925
0.95
0.975
1
1.025
1.05
1.075
1.1
1.125
1.15
1.175
1.2
1.225
1.25
1.275
1.3
1.325
1.35
1.375
1.4
1.425
1.45
1.475
1.5
1.55
1.6
1.65
1.7
1.75
1.8
PTH12030L
R
SET
Open
312 kΩ
152 kΩ
98.8 kΩ
72.1 kΩ
56.1 kΩ
45.5 kΩ
37.8 kΩ
32.1 kΩ
27.7 kΩ
24.1 kΩ
21.2 kΩ
18.8 kΩ
16.7 kΩ
15 kΩ
13.5 kΩ
12.1 kΩ
11 kΩ
9.91 kΩ
8.97 kΩ
8.13 kΩ
7.37 kΩ
6.68 kΩ
6.04 kΩ
5.46 kΩ
4.93 kΩ
4.44 kΩ
3.98 kΩ
3.56 kΩ
2.8 kΩ
2.13 kΩ
1.54 kΩ
1.02 kΩ
551
Ω
130
Ω
9
TI [ TEXAS INSTRUMENTS ]
