Datasheet

LTM4622
18
Rev. G
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APPLICATIONS INFORMATION
Figure20. 12V to 3.3V Derating Curve,
No Heat Sink
Table2. 1V Output
DERATING CURVE V
IN
(V) POWER LOSS CURVE AIR FLOW (LFM) HEAT SINK θ
JA(°C/W)
Figure13, Figure14 5, 12 Figure8 0 None 19 – 20
Figure13, Figure14 5, 12 Figure8 200 None 17 – 18
Figure13, Figure14 5, 12 Figure8 400 None 17 – 18
Table3. 1.5V Output
DERATING CURVE V
IN
(V) POWER LOSS CURVE AIR FLOW (LFM) HEAT SINK θ
JA(°C/W)
Figure15, Figure16 5, 12 Figure9 0 None 19 – 20
Figure15, Figure16 5, 12 Figure9 200 None 17 – 18
Figure15, Figure16 5, 12 Figure9 400 None 17 – 18
Table4. 2.5V Output
DERATING CURVE V
IN
(V) POWER LOSS CURVE AIR FLOW (LFM) HEAT SINK θ
JA(°C/W)
Figure17, Figure18 5, 12 Figure10 0 None 19 – 20
Figure17, Figure18 5, 12 Figure10 200 None 17 – 18
Figure17, Figure18 5, 12 Figure10 400 None 17 – 18
Table5. 3.3V Output
DERATING CURVE V
IN
(V) POWER LOSS CURVE AIR FLOW (LFM) HEAT SINK θ
JA(°C/W)
Figure19, Figure20 5, 12 Figure11 0 None 19 – 20
Figure19, Figure20 5, 12 Figure11 200 None 17 – 18
Figure19, Figure20 5, 12 Figure11 400 None 17 – 18
Table6. 5V Output
DERATING CURVE V
IN
(V) POWER LOSS CURVE AIR FLOW (LFM) HEAT SINK θ
JA(°C/W)
Figure21 12 Figure12 0 None 19 – 20
Figure21 12 Figure12 200 None 17 – 18
Figure21 12 Figure12 400 None 17 – 18
AMBIENT TEMPERATURE (˚C)
40
6
5
3
4
2
1
0
80
90
4622 F20
50
60
70
100
110
120
OUTPUT CURRENT (A)
0LFM
200LFM
400LFM
AMBIENT TEMPERATURE (˚C)
40
6
5
3
4
2
1
0
80
90
4622 F21
50
60
70
100
110
120
OUTPUT CURRENT (A)
0LFM
200LFM
400LFM
Figure21. 12V to 5V Derating Curve,
No Heat Sink
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