Datasheet

LTM4644/LTM4644-1
23
Rev. F
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APPLICATIONS INFORMATION
Figure 27. 12V
IN
to 3.3V
OUT
Derating Curve 4-Channel
Paralleled, BGA Heat Sink
Figure 28. 12V
IN
to 5V
OUT
Derating Curve 4-Channel
Paralleled, No Heat Sink
Figure 29. 12V
IN
to 5V
OUT
Derating Curve 4-Channel
Paralleled, BGA Heat Sink
Figure 30. Power Loss Allowance
vs. Ambient Temperature No Heat
Sink
Figure 31. Power Loss Allowance
vs. Ambient Temperature BGA
Heat Sink
AMBIENT TEMPERATURE (°C)
30
0
CURRENT (A)
10
18
14
16
12
4641 F28
4
2
8
6
120
40
80
100
60
50
90
110
70
0LFM
200LFM
400LFM
AMBIENT TEMPERATURE (°C)
30
0
CURRENT (A)
10
18
14
16
12
4641 F27
4
2
8
6
120
40
80
100
60
50
90
110
70
0LFM
200LFM
400LFM
AMBIENT TEMPERATURE (°C)
30
0
CURRENT (A)
10
18
14
16
12
4641 F29
4
2
8
6
120
40
80
100
60
50
90
110
70
0LFM
200LFM
400LFM
AMBIENT TEMPERATURE (°C)
30
0
POWER LOSS ALLOWANCE (W)
10
9
4641 F30
4
2
8
7
6
3
1
5
120
40
80
100
60
50
90
110
70
0LFM
200LFM
400LFM
AMBIENT TEMPERATURE (°C)
30
0
POWER LOSS ALLOWANCE (W)
12
10
4641 F31
4
2
8
6
1
11
5
3
9
7
120
40
80
100
60
50
90
110
70
0LFM
200LFM
400LFM
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