Datasheet

Equation 1. Output Voltage Adjust
R =10k x
SET
W
0.8V
-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, R
S
and V
min
.
Table 2. Adjust Equation Parameters
Parameter PTH12060W PTH12060L
V
min
(V) 1.2 0.8
V
max
(V) 5.5 1.8
R
S
(k Ω ) 1.82 7.87
Table 3. Output Voltage Set-Point Resistor Values
PTH12060W PTH12060L
V
O
(V) R
SET
(k Ω ) V
O
(V) R
SET
(k Ω ) V
O
(V) R
SET
(k Ω )
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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