PT6943A Datasheet, PDF (8/11 Pages) Texas Instruments – 6-A Dual Output 5-V/3.3-V Input Integrated Switching Regulator

Application Notes
PT6940 Series
Not Recommended For New Designs
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)
R_s (kΩ)
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
†(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(req’d)
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)kΩ
(2.0)kΩ
(4.3)kΩ
(6.9)kΩ
(10.0)kΩ
(13.6)kΩ
(18.0)kΩ
(23.3)kΩ
(30.0)kΩ
(38.6)kΩ
(50.0)kΩ
(90.0)kΩ
(210.0)kΩ
70.0kΩ
25.0kΩ
10.0kΩ
2.5kΩ
2.5V
(0.0)
(1.6)kΩ
(3.7)kΩ
(6.1)kΩ
(9.0)kΩ
(12.6)kΩ
(17.0)kΩ
(22.7)kΩ
(30.3)kΩ
(41.0)kΩ
(57.0)kΩ
(83.7)kΩ
(137.0)kΩ
(297.0)kΩ
167.0kΩ #
77.0kΩ #
47.0kΩ #
32.0kΩ #
23.0kΩ #
R1/R3 = (Blue), R2/R4 = Black
# See Note 3
Vo2 Bus
Series Pt #
Adj. Resistor
Vo(nom)
Va(req’d)
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)kΩ
(1.6)kΩ
(3.7)kΩ
(6.1)kΩ
(9.0)kΩ
(12.6)kΩ
(17.0)kΩ
(22.7)kΩ
(30.3)kΩ
(41.0)kΩ
(57.0)kΩ
(83.7)kΩ
(137.0)kΩ
(297.0)kΩ
167.0kΩ
77.0kΩ
47.0kΩ
32.0kΩ
23.0kΩ
17.0kΩ
12.7kΩ
9.5kΩ
7.0kΩ
5.0kΩ
2.0kΩ
PT6943/47
(R3)/R4
1.5V
1.2V *
2.4V
10.0
PT6942/46
(R3)/R4
1.8V
(0.0)kΩ
(6.0)kΩ
(15.0)kΩ
(30.0)kΩ
(60.0)kΩ
(150.0)kΩ
160.0kΩ
70.0kΩ
40.0kΩ
25.0kΩ
16.0kΩ
10.0kΩ
5.7kΩ
2.5kΩ
PT6944/48
(R3)/R4
1.2V
1.15V
1.5V †
29.4
PT6943/47
(R3)/R4
1.5V
(0.0)kΩ
(4.0)kΩ
(10.0)kΩ
(20.0)kΩ
(40.0)kΩ
(100.0)kΩ
170.0kΩ
80.0kΩ
50.0kΩ
35.0kΩ
26.0kΩ
19.6kΩ
15.7kΩ
12.5kΩ
10.0kΩ
8.0kΩ
6.4kΩ
5.0kΩ
3.9kΩ
2.9kΩ
2.0kΩ
1.3kΩ
0.6kΩ
0.0kΩ
PT6944/48
(R3)/R4
1.2V
(20.6)kΩ
151.0kΩ
60.6kΩ
30.6kΩ
15.6kΩ
6.6kΩ
0.0kΩ
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