www.ams.com/DC-DC_Step-Up/AS1340

Revision 1.20

12 - 17

AS1340

Datasheet - Application In form atio n

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.

Figure 30. Efficiency Comparison of Different Inductors, VIN = 3.3V, VOUT = 18V

Figure 31. Efficiency Comparison of Different Inductors, VIN = 5.5V, VOUT = 18V

Table 4. Recommended Inductors

Part Number

L

DCR

Current Rating

Dimensions (L/W/T)

Manufacturer

LPS4018-472ML_

4.7µH

0.125



1.9A

4.4x4.4x1.7mm

Coilcraft

www.coilcraft.com

ME3220-472ML_

4.7µH

0.190



1.5A

3.2x2.8x2mm

MOS6020-472ML_

4.7µH

0.050



1.94A

6.8x6x2.4mm

MSS6122-472ML_

4.7µH

0.065



1.82A

6.1x6.1x6mm

LPS4018-682ML_

6.8µH

0.150



1.3A

4.4x4.4x1.7mm

ME3220-682ML_

6.8µH

0.270



1.2A

3.2x2.8x2mm

MOS6020-682ML_

6.8µH

0.078



1.72A

6.8x6x2.4mm

MSS6122-682ML_

6.8µH

0.100



1.50A

6.1x6.1x6mm

0

10

20

30

40

50

60

70

80

90

100

1

10

100

Output Current (mA)

MOS6020-472

MOS6020-682

MSS6122-472

MSS6122-682

0

10

20

30

40

50

60

70

80

90

100

1

10

100

Output Current (mA)

LPS4018-472

LPS4018-682

ME3220-472

ME3220-682

0

10

20

30

40

50

60

70

80

90

100

1

10

100

Output Current (mA)

LPS4018-472

LPS4018-682

ME3220-472

ME3220-682

0

10

20

30

40

50

60

70

80

90

100

110

100

Output Current (mA)

MOS6020-472

MOS6020-682

MSS6122-472

MSS6122-472