Datasheet
LTM4644/LTM4644-1
21
Rev. F
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APPLICATIONS INFORMATION
Figure 18. 5V
IN
to 1.0V
OUT
Derating Curve 4-Channel
Paralleled, BGA Heat Sink
Figure 19. 12V
IN
to 1.0V
OUT
Derating Curve 4-Channel
Paralleled, BGA Heat Sink
Figure 20. 5V
IN
to 1.5V
OUT
Derating Curve 4-Channel
Paralleled, No Heat Sink
AMBIENT TEMPERATURE (°C)
30
0
CURRENT (A)
10
18
14
16
12
4641 F20
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 F18
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 F19
4
2
8
6
120
40
80
100
60
50
90
110
70
0LFM
200LFM
400LFM
Figure 15. Power Loss at 5V
Output, (Each Channel, 25°C)
Figure 16. 5V
IN
to 1.0V
OUT
Derating Curve 4-Channel
Paralleled, No Heat Sink
Figure 17. 12V
IN
to 1.0V
OUT
Derating Curve 4-Channel
Paralleled, No Heat Sink
LOAD CURRENT (A)
0
0
POWER LOSS (W)
0.6
1.8
1.6
1
4641 F15
0.2
0.4
1.2
0.8
1.4
1.0
4
2
3
0.5
3.5
1.5
2.5
12V
IN
AMBIENT TEMPERATURE (°C)
30
0
CURRENT (A)
10
18
14
16
12
4641 F16
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 F17
4
2
8
6
120
40
80
100
60
50
90
110
70
0LFM
200LFM
400LFM
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