Datasheet

LTM4637
20
4637fc
For more information www.linear.com/LTM4637
Table 2. 1V Output
DERATING
CURVE V
IN
POWER LOSS
CURVE
AIRFLOW
(LFM) HEAT SINK
LGA
θ
JA
(°C/W)
BGA
θ
JA
(°C/W)
Figures 11, 13 5V, 12V Figure 8 0 None 9.3 10.4
Figures 11, 13 5V, 12V Figure 8 200 None 7.0 8.4
Figures 11, 13 5V, 12V Figure 8 400 None 6.0 7.4
Figures 12, 14 5V, 12V Figure 8 0 BGA Heat Sink 7.0 8.9
Figures 12, 14 5V, 12V Figure 8 200 BGA Heat Sink 6.0 6.9
Figures 12, 14 5V, 12V Figure 8 400 BGA Heat Sink 5.0 5.9
Table 3. 2.5V Output
DERATING
CURVE V
IN
POWER LOSS
CURVE
AIRFLOW
(LFM) HEAT SINK
LGA
θ
JA
(°C/W)
BGA
θ
JA
(°C/W)
Figures 15, 17 5V, 12V Figure 9 0 None 9.5 10.4
Figures 15, 17 5V, 12V Figure 9 200 None 8.0 8.4
Figures 15, 17 5V, 12V Figure 9 400 None 7.0 7.4
Figures 16, 18 5V, 12V Figure 9 0 BGA Heat Sink 8.0 8.9
Figures 16, 18 5V, 12V Figure 9 200 BGA Heat Sink 6.5 6.9
Figures 16, 18 5V, 12V Figure 9 400 BGA Heat Sink 5.5 5.9
Table 4. 5V Output (5V Output Connected to EXTV
CC
Pin)
DERATING
CURVE V
IN
POWER LOSS
CURVE
AIRFLOW
(LFM) HEAT SINK
LGA
θ
JA
(°C/W)
BGA
θ
JA
(°C/W)
Figures 19 12V Figure 10 0 None 9.5 10.4
Figures 19 12V Figure 10 200 None 8.0 8.9
Figures 19 12V Figure 10 400 None 7.0 7.9
Figures 20 12V Figure 10 0 BGA Heat Sink 8.0 8.9
Figures 20 12V Figure 10 200 BGA Heat Sink 6.5 7.4
Figures 20 12V Figure 10 400 BGA Heat Sink 5.5 6.4
applicaTions inForMaTion
Figure 19. 12V
IN
to 5V
OUT
No Heat Sink, EXTV
CC
= 5V
(Limit 5V Output to 15A)
Figure 20. 12V
IN
to 5V
OUT
with Heat Sink, EXTV
CC
= 5V
(Limit 5V Output to 15A)
TEMPERATURE (°C)
20
OUTPUT CURRENT (A)
15
20
25
100
4637 F19
10
5
0
30 40 50
50 70
80 90 110
120
0 LFM
200 LFM
400 LFM
TEMPERATURE (°C)
20
OUTPUT CURRENT (A)
15
20
25
100
4637 F20
10
5
0
30 40 50
50 70
80 90 110
120
0 LFM
200 LFM
400 LFM