Datasheet

PTH08T250W
SLTS278G –NOVEMBER 2010–REVISED MARCH 2009 www.ti.com
Table 2. Output Voltage Set-Point Resistor Values
V
O
Required (V) R
SET
(kΩ) V
O
Required (V) R
SET
(kΩ)
0.70
(1)
Open 2.10 8.66
0.75
(1)
412 2.20 7.50
0.80
(1)
205 2.30 6.65
0.85
(1)
133 2.40 5.90
0.90
(1)
97.6 2.50 5.23
0.95
(1)
78.7 2.60 4.64
1.00
(1)
63.4 2.70 4.02
1.10
(1)
46.4 2.80 3.57
1.20 35.7 2.90 3.09
1.30 28.7 3.00 2.67
1.40 23.7 3.10 2.26
1.50 19.6 3.20 1.96
1.60 16.9 3.30 1.62
1.70 14.7 3.40 1.30
1.80 12.7 3.50 1.02
1.90 11.0 3.60 0.768
2.00 9.76
(1) For output voltages less than 1.2 V, the output ripple may increase (up to 2×) when operating at input
voltages greater than (V
O
× 12). Adjusting the switching frequency using the SmartSync feature may
increase or decrease this ratio. Please review the SmartSync section of the Application Information for
further guidance.
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