Datasheet

LTM4608A
19
4608afd
applicaTions inForMaTion
Table 4. 1.5V Output
DERATING CURVE V
IN
(V) POWER LOSS CURVE AIR FLOW (LFM) HEAT SINK
θ
JA
(°C/W)
Figures 9, 11 3.3, 5 Figures 7, 8 0 None 25
Figures 9, 11 3.3, 5 Figures 7, 8 200 None 21
Figures 9, 11 3.3, 5 Figures 7, 8 400 None 20
Figures 10, 12 3.3, 5 Figures 7, 8 0 BGA Heat Sink 23.5
Figures 10, 12 3.3, 5 Figures 7, 8 200 BGA Heat Sink 22
Figures 10, 12 3.3, 5 Figures 7, 8 400 BGA Heat Sink 22
Table 5. 3.3V Output
DERATING CURVE V
IN
(V) POWER LOSS CURVE AIR FLOW (LFM) HEAT SINK
θ
JA
(°C/W)
Figure 15 5 Figure 8 0 None 25
Figure 15 5 Figure 8 200 None 21
Figure 15 5 Figure 8 400 None 20
Figure 16 5 Figure 8 0 BGA Heat Sink 23.5
Figure 16 5 Figure 8 200 BGA Heat Sink 22
Figure 16 5 Figure 8 400 BGA Heat Sink 22
Figure 15. No Heat Sink with 5V
IN
to 3.3V
OUT
Figure 16. BGA Heat Sink with 5V
IN
to 3.3V
OUT
AMBIENT TEMPERATURE (°C)
40
LOAD CURRENT (A)
5
6
7
120
4608A F15
4
3
0
1
60
80
100
50
70
90
110
2
9
8
400LFM
200LFM
0LFM
AMBIENT TEMPERATURE (°C)
40
LOAD CURRENT (A)
5
6
7
120
4608A F16
4
3
0
1
60
80
100
50
70
90
110
2
9
8
400LFM
200LFM
0LFM