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LTM4657 Datasheet(PDF) 20 Page - Analog Devices

Part # LTM4657
Description  20VIN, 8A Step-Down DC/DC 關Module Regulator
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTM4657 Datasheet(HTML) 20 Page - Analog Devices

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LTM4657
20
Rev. A
For more information www.analog.com
APPLICATIONS INFORMATION
Figure 19. 12V to 3.3V Derating
Curve, No Heat Sink
Figure 20. 12V to 5V Derating
Curve, No Heat Sink
Figure 18. 5V to 3.3V Derating
Curve, No Heat Sink
Table 3. 1.0V Output
DERATING CURVE
VIN (V)
POWER LOSS CURVE
AIR FLOW (LFM)
HEAT SINK
θJA(°C/W)
Figure 14, Figure 15
5, 12
Figure 10
0
None
17
Figure 14, Figure 15
5, 12
Figure 10
200
None
14.5
Figure 14, Figure 15
5, 12
Figure 10
400
None
13.5
Table 4. 1.5V Output
DERATING CURVE
VIN (V)
POWER LOSS CURVE
AIR FLOW (LFM)
HEAT SINK
θJA(°C/W)
Figure 16, Figure 17
5, 12
Figure 11
0
None
17
Figure 16, Figure 17
5, 12
Figure 11
200
None
14.5
Figure 16, Figure 17
5, 12
Figure 11
400
None
13.5
Table 5. 3.3V Output
DERATING CURVE
VIN (V)
POWER LOSS CURVE
AIR FLOW (LFM)
HEAT SINK
θJA(°C/W)
Figure 18, Figure 19
5, 12
Figure 12
0
None
17
Figure 18, Figure 19
5, 12
Figure 12
200
None
14.5
Figure 18, Figure 19
5, 12
Figure 12
400
None
13.5
Table 6. 5V Output
DERATING CURVE
VIN (V)
POWER LOSS CURVE
AIR FLOW (LFM)
HEAT SINK
θJA(°C/W)
Figure 20
12
Figure 13
0
None
17
Figure 20
12
Figure 13
200
None
14.5
Figure 20
12
Figure 13
400
None
13.5
TA (°C)
0
9
8
6
4
2
7
5
3
1
0
80
40
4657 F18
120
60
20
100
0LFM
200LFM
400LFM
TA (°C)
0
9
8
6
4
2
7
5
3
1
0
80
40
4657 F19
120
60
20
100
0LFM
200LFM
400LFM
TA (°C)
0
9
8
6
4
2
7
5
3
1
0
80
40
4657 F20
120
60
20
100
0LFM
200LFM
400LFM



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