LTM4601EV-1#PBF Linear Technology, LTM4601EV-1#PBF Datasheet - Page 16

• Manufacturer Part Number: LTM4601EV-1#PBF
• Description: IC DC/DC UMODULE 12A 118-LGA
• Manufacturer: Linear Technology
• Series: µModuler
• Type: Point of Load (POL) Non-Isolatedr

Specifications of LTM4601EV-1#PBF

• Design Resources: LTM4601-1 Spice Model
• Output: 0.6 ~ 5 V
• Number Of Outputs: 1
• Power (watts): 60W
• Mounting Type: Surface Mount
• Voltage - Input: 4.5 ~ 20V
• Package / Case: 118-LGA
• 1st Output: 0.6 ~ 5 VDC @ 12A
• Size / Dimension: 0.59" L x 0.59" W x 0.11" H (15mm x 15mm x 2.8mm)
• Power (watts) - Rated: 60W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 95%
• Dc To Dc Converter Type: Step Down
• Pin Count: 118
• Input Voltage: 20V
• Output Voltage: 0.6 to 5V
• Switching Freq: 850kHz
• Output Current: 12A
• Package Type: LGA
• Output Type: Adjustable
• Switching Regulator: Yes
• Load Regulation: 0.01
• Line Regulation: 0.3%
• Mounting: Surface Mount
• Input Voltage (min): 4.5V
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• Lead Free Status / Rohs Status: Compliant

LTM4601/LTM4601-1
Thermal Considerations and Output Current Derating
The power loss curves in Figures 7 and 8 can be used
in coordination with the load current derating curves in
Figures 9 to 14 for calculating an approximate θ
module with various heat sinking methods. Thermal models
are derived from several temperature measurements at
the bench and thermal modeling analysis. Thermal Ap-
plication Note 103 provides a detailed explanation of the
analysis for the thermal models and the derating curves.
Tables 3 and 4 provide a summary of the equivalent θ
for the noted conditions. These equivalent θ
are correlated to the measured values, and are improved
with air fl ow. The case temperature is maintained at 100°C
APPLICATIONS INFORMATION
16
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
12
10
8
6
4
2
0
0
50
0
Figure 9. No Heat Sink 5V
Figure 7. 1.5V Power Loss
5V
5V
5V
60
2
AMBIENT TEMPERATURE (°C)
IN
IN
IN
, 1.5V
, 1.5V
, 1.5V
OUTPUT CURRENT (A)
12V LOSS
4
70
OUT
OUT
OUT
0LFM
200LFM
400LFM
20V LOSS
6
80
5V LOSS
8
90
10
IN
4600 F09
4601 F07
100
JA
12
parameters
JA
for the
JA
or below for the derating curves. The maximum case
temperature of 100°C is to allow for a rise of about 13°C
to 25°C inside the μModule with a thermal resistance θ
from junction to case between 6°C/W to 9°C/W. This will
maintain the maximum junction temperature inside the
μModule below 125°C.
Safety Considerations
The LTM4601 modules do not provide isolation from
V
slow blow fuse with a rating twice the maximum input
current needs to be provided to protect each unit from
catastrophic failure.
IN
to V
OUT
12
10
8
6
4
2
0
6
5
4
3
2
1
0
. There is no internal fuse. If required, a
50
0
Figure 10. BGA Heat Sink 5V
Figure 8. 3.3V Power Loss
5V
5V
5V
60
2
AMBIENT TEMPERATURE (°C)
IN
IN
IN
, 1.5V
, 1.5V
, 1.5V
OUTPUT CURRENT (A)
4
70
OUT
OUT
OUT
20V LOSS
0LFM
200LFM
400LFM
6
80
8
12V LOSS
90
10
4601 F10
4601 F08
IN
100
12
4601fb
JC