Datasheet

PTH08T240W , PTH08T241W
SLTS264J – NOVEMBER 2005 – REVISED JUNE 2009 ................................................................................................................................................... www.ti.com
Table 2. Output Voltage Set-Point Resistor Values (Standard Values)
V
O
Required (V) R
SET
(k Ω ) V
O
Required (V) R
SET
( Ω )
0.70
(1)
681 2.50 2.37 k
0.75
(1)
113 2.60 2.15 k
0.80
(1)
61.9 2.70 2.00 k
0.85
(1)
41.2 2.80 1.82 k
0.90
(1)
31.6 2.90 1.69 k
0.95
(1)
24.9 3.00 1.54 k
1.00
(1)
20.5 3.10 1.43 k
1.05
(1)
17.8 3.20 1.33 k
1.10
(1)
15.4 3.30 1.21 k
1.15
(1)
13.3 3.40 1.10 k
1.20
(1)
12.1 3.50 1.02 k
1.25 10.7 3.60 931
1.30 9.88 3.70
(2)
866
1.35 9.09 3.80
(2)
787
1.40 8.25 3.90
(2)
715
1.45 7.68 4.00
(2)
649
1.50 6.98 4.10
(2)
590
1.55 6.49 4.20
(2)
536
1.60 6.04 4.30
(2)
475
1.65 5.76 4.40
(2)
432
1.70 5.36 4.50
(2)
383
1.75 5.11 4.60
(2)
332
1.80 4.75 4.70
(2)
287
1.85 4.53 4.80
(2)
249
1.90 4.22 4.90
(2)
210
1.95 4.02 5.00
(2)
169
2.00 3.83 5.10
(2)
133
2.10 3.40 5.20
(2)
100
2.20 3.09 5.30
(2)
66.5
2.30 2.87 5.40
(2)
34.8
2.40 2.61 5.50
(2)
4.99
(1) For output voltages ≤ 1.2V, at nominal operating frequency, the output ripple may increase (typically
2 × ) when operating at input voltages greater than (V
O
× 11). When using the SmartSync feature,
review the SmartSync application section for further guidance.
(2) For V
O
> 3.6 V, the minimum input voltage is (V
O
+ 2) V.
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