AS1340 データシートの表示（PDF） - austriamicrosystems AG
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AS1340 Datasheet PDF : 17 Pages
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AS1340
Datasheet - Application Information
9.6 Inductor Selection
For the external inductor, a 6.8µH inductor is recommended. Minimum inductor size is dependant on the desired efficiency and output current.
Inductors with low core losses and small DCR at 1MHz are recommended.
Table 4. Recommended Inductors
Part Number
L
LPS4018-472ML_
4.7µH
ME3220-472ML_
4.7µH
MOS6020-472ML_
4.7µH
MSS6122-472ML_
4.7µH
LPS4018-682ML_
6.8µH
ME3220-682ML_
6.8µH
MOS6020-682ML_
6.8µH
MSS6122-682ML_
6.8µH
DCR
0.125
0.190
0.050
0.065
0.150
0.270
0.078
0.100
Current Rating
1.9A
1.5A
1.94A
1.82A
1.3A
1.2A
1.72A
1.50A
Dimensions (L/W/T)
4.4x4.4x1.7mm
3.2x2.8x2mm
6.8x6x2.4mm
6.1x6.1x6mm
4.4x4.4x1.7mm
3.2x2.8x2mm
6.8x6x2.4mm
6.1x6.1x6mm
Manufacturer
Coilcraft
www.coilcraft.com
Figure 30. Efficiency Comparison of Different Inductors, VIN = 3.3V, VOUT = 18V
100
100
90
90
80
80
70
70
60
60
50
50
40
40
30
20
10
0
1
LPS4018-472
LPS4018-682
ME3220-472
ME3220-682
10
100
Output Current (mA)
30
20
10
0
1
MOS6020-472
MOS6020-682
MSS6122-472
MSS6122-682
10
100
Output Current (mA)
Figure 31. Efficiency Comparison of Different Inductors, VIN = 5.5V, VOUT = 18V
100
100
90
90
80
80
70
70
60
60
50
50
40
40
30
20
10
0
1
LPS4018-472
LPS4018-682
ME3220-472
ME3220-682
10
100
Output Current (mA)
30
20
10
0
1
MOS6020-472
MOS6020-682
MSS6122-472
MSS6122-472
10
100
Output Current (mA)
www.ams.com/DC-DC_Step-Up/AS1340
Revision 1.20
12 - 17
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