PT6920 Datasheet, PDF (4/5 Pages) Texas Instruments – 5V TO 3.3V/2.5V 25 WATT DUAL OUTPUT INTEGRATED SWITCHING REGULATOR

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PT6920 Series
Table 2
PT6920 ADJUSTMENT RESISTOR VALUES
Output Bus
Series Pt #
V1 out
PT6921/22
V2 out
PT6921
Adj Resistor (R3)/R4
(R1)/R2
Vo(nom)
3.3Vdc
2.5Vdc
Va(req’d)
1.2
1.25
1.3
1.35
1.4
1.45
1.5
1.55
1.6
1.65
1.7
1.75
1.8
(0.0)kΩ
1.85
(1.6)kΩ
1.9
(3.5)kΩ
1.95
(5.8)kΩ
2.0
(8.5)kΩ
2.05
(11.8)kΩ
2.1
(16.0)kΩ
2.15
(21.4)kΩ
2.2
(28.5)kΩ
2.25
(38.5)kΩ
2.3
(3.6)kΩ
(53.5)kΩ
2.35
(5.1)kΩ
(78.5)kΩ
2.4
(6.7)kΩ
(129.0)kΩ
2.45
(8.5)kΩ
(279.0)kΩ
2.5
(10.6)kΩ
2.55
(12.9)kΩ
189.0kΩ
2.6
(15.6)kΩ
88.5kΩ
2.65
(18.6)kΩ
55.2kΩ
2.7
(22.2)kΩ
38.5kΩ
2.75
(26.4)kΩ
28.5kΩ
2.8
(31.5)kΩ
21.8kΩ
2.85
(37.6)kΩ
17.1kΩ
2.9
(45.4)kΩ
13.5kΩ
2.95
(55.3)kΩ
10.7kΩ
3.0
(68.6)kΩ
8.5kΩ
3.05
(87.1)kΩ
3.1
(115.0)kΩ
3.15
(161.0)kΩ
3.2
(254.0)kΩ
3.25
(532.0)kΩ
3.3
3.4
109.0kΩ
3.5
48.4kΩ
3.6
28.2kΩ
3.7
18.2kΩ
3.8
12.1kΩ
3.9
8.1kΩ
4.0
5.2kΩ
4.1
3.0kΩ
4.2
1.3kΩ
R1/R3 = (Red)
R2/R4 = Black
PT6922
(R1)/R2
1.5Vdc
(0.0)kΩ
(3.3)kΩ
(8.2)kΩ
(16.3)kΩ
(32.6)kΩ
(81.4)kΩ
189.0kΩ
91.1kΩ
58.6kΩ
42.3kΩ
32.6kΩ
26.0kΩ
21.4kΩ
17.9kΩ
15.2kΩ
13.0kΩ
11.3kΩ
9.8kΩ
8.5kΩ
7.5kΩ
6.5kΩ
5.7kΩ
5.0kΩ
4.4kΩ
3.8kΩ
3.3kΩ
2.8kΩ
2.4kΩ
2.0kΩ
1.6kΩ
1.3kΩ
1.0kΩ
0.7kΩ
0.5kΩ
0.2kΩ
0.0kΩ
Application Notes
4
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