AS1340
Datasheet - Application Information
Inductor Selection
For the external inductor, a 6.8µH inductor is recommended. Minimum inductor size is dependant on the desired effi-
ciency and output current. Inductors with low core losses and small DCR at 1MHz are recommended.
Table 4. Recommended Inductors
Part Number
L
DCR
Current Rating Dimensions (L/W/T)
Manufacturer
Coilcraft
www.coilcraft.com
LPS4018-472ML_
ME3220-472ML_
MOS6020-472ML_
MSS6122-472ML_
LPS4018-682ML_
ME3220-682ML_
MOS6020-682ML_
MSS6122-682ML_
4.7µH
4.7µH
4.7µH
4.7µH
6.8µH
6.8µH
6.8µH
6.8µH
0.125Ω
0.190Ω
0.050Ω
0.065Ω
0.150Ω
0.270Ω
0.078Ω
0.100Ω
1.9A
1.5A
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
1.94A
1.82A
1.3A
1.2A
1.72A
1.50A
Figure 30. Efficiency Comparison of Different Inductors, VIN = 3.3V, VOUT = 18V;
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
LPS4018-472
MOS6020-472
LPS4018-682
ME3220-472
MOS6020-682
MSS6122-472
ME3220-682
MSS6122-682
1
10
100
1
10
100
Output Current (mA)
Output Current (mA)
Figure 31. Efficiency Comparison of Different Inductors, VIN = 5.5V, VOUT = 18V;
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
LPS4018-472
MOS6020-472
LPS4018-682
ME3220-472
MOS6020-682
MSS6122-472
ME3220-682
MSS6122-472
1
10
100
1
10
100
Output Current (mA)
Output Current (mA)
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