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PT6940 Datasheet, PDF (8/9 Pages) Texas Instruments – 6-A Dual Output 5-V/3.3-V Input Integrated Switching Regulator | |||
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Application Notes
PT6940 Series
Table 1
ADJUSTMENT RANGE AND FORMULA PARAMETERS
Vo1 Bus
Series Pt #
Adj. Resistor
PT6941/42/43/44 PT6946/47/48
(R1)/R2
(R1)/R2
Vo2 Bus (2)
PT6941
(R3)/R4
Vo(nom)
Va(min)
Va(max)
Rs (kâ¦)
3.3V
2.5V *
3.5V
20.0
2.5V
1.8V *
2.5V
13.0
2.5V
1.8V *
3.1V
13.0
Ref. Note 4: * (R1) = Zero-ohm link
â (R3) = Zero-ohm link
Table 2
ADJUSTMENT RESISTOR VALUES
Vo1 Bus
Series Pt #
PT6941/42/43/44 PT6946/47/48
Adj. Resistor
(R1)/R2
(R1)/R2
Vo(nom)
Va(reqâd)
1.8
1.85
1.9
1.95
2.0
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
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.3V
(0.0)kâ¦
(2.0)kâ¦
(4.3)kâ¦
(6.9)kâ¦
(10.0)kâ¦
(13.6)kâ¦
(18.0)kâ¦
(23.3)kâ¦
(30.0)kâ¦
(38.6)kâ¦
(50.0)kâ¦
(90.0)kâ¦
(210.0)kâ¦
70.0kâ¦
25.0kâ¦
10.0kâ¦
2.5kâ¦
2.5V
(0.0)
(1.6)kâ¦
(3.7)kâ¦
(6.1)kâ¦
(9.0)kâ¦
(12.6)kâ¦
(17.0)kâ¦
(22.7)kâ¦
(30.3)kâ¦
(41.0)kâ¦
(57.0)kâ¦
(83.7)kâ¦
(137.0)kâ¦
(297.0)kâ¦
167.0k⦠#
77.0k⦠#
47.0k⦠#
32.0k⦠#
23.0k⦠#
R1/R3 = (Blue), R2/R4 = Black
# See Note 3
Vo2 Bus
Series Pt #
Adj. Resistor
Vo(nom)
Va(reqâd)
1.15
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
1.85
1.9
1.95
2.0
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
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.1
PT6942/46
(R3)/R4
1.8V
1.5V *
2.2V
20.0
PT6941
(R3)/R4
2.5V
(0.0)kâ¦
(1.6)kâ¦
(3.7)kâ¦
(6.1)kâ¦
(9.0)kâ¦
(12.6)kâ¦
(17.0)kâ¦
(22.7)kâ¦
(30.3)kâ¦
(41.0)kâ¦
(57.0)kâ¦
(83.7)kâ¦
(137.0)kâ¦
(297.0)kâ¦
167.0kâ¦
77.0kâ¦
47.0kâ¦
32.0kâ¦
23.0kâ¦
17.0kâ¦
12.7kâ¦
9.5kâ¦
7.0kâ¦
5.0kâ¦
2.0kâ¦
PT6943/47
(R3)/R4
1.5V
1.2V *
2.4V
10.0
PT6942/46
(R3)/R4
1.8V
(0.0)kâ¦
(6.0)kâ¦
(15.0)kâ¦
(30.0)kâ¦
(60.0)kâ¦
(150.0)kâ¦
160.0kâ¦
70.0kâ¦
40.0kâ¦
25.0kâ¦
16.0kâ¦
10.0kâ¦
5.7kâ¦
2.5kâ¦
PT6944/48
(R3)/R4
1.2V
1.15V
1.5V â
29.4
PT6943/47
(R3)/R4
1.5V
(0.0)kâ¦
(4.0)kâ¦
(10.0)kâ¦
(20.0)kâ¦
(40.0)kâ¦
(100.0)kâ¦
170.0kâ¦
80.0kâ¦
50.0kâ¦
35.0kâ¦
26.0kâ¦
19.6kâ¦
15.7kâ¦
12.5kâ¦
10.0kâ¦
8.0kâ¦
6.4kâ¦
5.0kâ¦
3.9kâ¦
2.9kâ¦
2.0kâ¦
1.3kâ¦
0.6kâ¦
0.0kâ¦
PT6944/48
(R3)/R4
1.2V
(20.6)kâ¦
151.0kâ¦
60.6kâ¦
30.6kâ¦
15.6kâ¦
6.6kâ¦
0.0kâ¦
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