ltm4616 Linear Technology Corporation, ltm4616 Datasheet - Page 18

• Manufacturer Part Number: ltm4616
• Description: Dual 8a Per Channel Low Vin Dc/dc ?module
• Manufacturer: Linear Technology Corporation

LTM4616
Table 4. 1.2V Output
Safety Considerations
The LTM4616 modules do not provide isolation from V
to V
fuse with a rating twice the maximum input current needs
to be provided to protect each unit from catastrophic
failure. The device does support thermal shutdown and
over current protection.
Table 5. 3.3V Output
Heatsink Manufacturer
Wakefi eld Engineering
AAVID Thermalloy
18
APPLICATIONS INFORMATION
DERATING CURVE
DERATING CURVE
OUT
Figures 10, 13
Figures 10, 13
Figures 10, 13
Figures 12, 15
Figures 12, 15
Figures 12, 15
Figure 11
Figure 11
Figure 11
Figure 9
Figure 9
Figure 9
. There is no internal fuse. If required, a slow blow
Figure 15. 3.3V
16
14
12
10
8
6
4
2
0
40
50
AMBIENT TEMPERATURE (°C)
60
IN
70
1.2V
0 LFM
V
V
3.3, 5
3.3, 5
3.3, 5
3.3, 5
3.3, 5
3.3, 5
80
IN
200 LFM
IN
OUT
5
5
5
5
5
5
(V)
(V)
90
with BGA Heatsink
100 110
400 LFM
4616 F15
Part No: LTN20069
Part No: 375424B000346
POWER LOSS CURVE
POWER LOSS CURVE
120
Figures 7, 8
Figures 7, 8
Figures 7, 8
Figures 7, 8
Figures 7, 8
Figures 7, 8
Figure 8
Figure 8
Figure 8
Figure 8
Figure 8
Figure 8
IN
Layout Checklist/Example
The high integration of LTM4616 makes the PCB board
layout very simple and easy. However, to optimize its
electrical and thermal performance, some layout con-
siderations are still necessary.
• Use large PCB copper areas for high current paths,
AIR FLOW (LFM)
AIR FLOW (LFM)
including V
V
and thermal stress.
OUT2
200
400
200
400
200
400
200
400
0
0
0
0
Figure 16. 3.3V
. It helps to minimize the PCB conduction loss
16
14
12
10
8
6
4
2
0
30
IN1
, V
Phone Number: 603-635-2800
Phone Number: 603-224-9988
AMBIENT TEMPERATURE (°C)
50
IN2
BGA Heat Sink
BGA Heat Sink
BGA Heat Sink
BGA Heat Sink
BGA Heat Sink
BGA Heat Sink
IN
, PGND1 and PGND2, V
HEAT SINK
HEAT SINK
2.5V
None
None
None
None
None
None
70
200 LFM
0 LFM
OUT
with BGA Heatsink
90
400 LFM
110
4616 F16
θ
θ
JA
JA
10.5
10.5
8.0
7.0
9.5
6.3
5.2
(°C/W)
(°C/W)
8.0
7.0
9.8
7.0
5.5
OUT1
and
4616f