DB318C Series
SURFACE MOUNT FIXED INDUCTOR
TYPE DB318C
Inductance Range:
3.3 - 22µH
Frequency Range:
0.1 - 1MHz
Description
The TOKO DB318C Series is a low profile surface mount fixed
inductor with a maximum height of 1.8mm. The product is
magnetically shielded and designed for space constrained DC-DC
converter applications in portable platforms including wireless
handsets, PDA's, and consumer electronics.
Dimensions & Recommended Patterns:
Features
•
•
•
•
•
•
3.8mm x 3.8mm footprint (±0.2mm)
1.8mm maximum height
Magnetically shielded
Reflow solderable
Packaged on 2000 piece reels
Lead-free terminations
1.5
3.
8
±
0
.2
3.
8
.2
±
0
1.8 Max.
2.2
5.1
Unit: mm
STANDARD PARTS SELECTION GUIDE
(1) Inductance is measured by LCR-meter 4284A (Agilent) or equivalent.
(2) DC resistance is measured by Digital Multimeter TR6871 (Advantest) or equivalent.
(3) Maximum allowable DC current is that which causes a 30% inductance reduction from the initial value,
or coil temperature to rise by 40°C, whichever is smaller. (Reference ambient temperature 20°C).
Rated DC current for a 10% inductance reduction is provided as well.
TYPE DB318C
TOKO
Part
Number
A997AS-3R3M=P3
A997AS-3R9M=P3
A997AS-4R7M=P3
A997AS-5R6M=P3
A997AS-6R8M=P3
A997AS-8R2M=P3
A997AS-100M=P3
A997AS-120M=P3
A997AS-150M=P3
A997AS-180M=P3
A997AS-220M=P3
Inductance
(1)
(µH)
Tolerance
(%)
DC
(2)
Resistance
(
Ω
) max.
0.07
0.09
0.10
0.12
0.13
0.16
0.18
0.23
0.26
0.33
0.44
Inductance
(3)
Decrease Current
-10% (A)
-30% (A)
max.
max.
0.94
0.86
0.86
0.81
0.69
0.58
0.58
0.55
0.48
0.42
0.39
1.20
1.10
1.07
1.02
0.89
0.75
0.75
0.70
0.61
0.53
0.51
Temperature
(3)
Rise Current
+40°C
∆T
(A)
max.
1.55
1.29
1.21
1.16
1.03
0.99
0.93
0.73
0.70
0.59
0.51
3.3
3.9
4.7
5.6
6.8
8.2
10
12
15
18
22
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
Note:
=P3
is added to each part number to indicate tape and reel packaging.
January 2005
© 2005 TOKO America, Inc.
All Rights Reserved
Printed in USA
CF-272-DB318C
R-LOG0105A
1
DB318C Series
SURFACE MOUNT FIXED INDUCTOR
TYPICAL CHARACTERISTICS
A997AS-2R2M (2.2µH)
Inductance (
µH)
2.5
2
1.5
1
0.5
0
0
0.5
1
1.5
2
2.5
A997AS-8R2M (8.2µH)
10
9
8
7
6
5
4
3
2
1
0
0
200
400
600
800
1000
Inductance (
µH)
DC Current (A)
DC Current (mA)
A997AS-3R3M (3.3µH)
5
4
3
2
1
0
0
200
400
600
800
1000
1200
1400
1600
A997AS-100M (10µH)
11
10
9
8
7
6
5
4
3
2
1
0
0
200
400
600
800
1000
Inductance (
µH)
Inductance (
µH)
DC Current (mA)
DC Current (mA)
A997AS-3R9M (3.9µH)
5
A997AS-120M (12µH)
14
Inductance (
µH)
0
200
400
600
800
1000
1200
1400
Inductance (
µH)
4
3
2
1
0
12
10
8
6
4
2
0
0
200
400
600
800
1000
DC Current (mA)
DC Current (mA)
A997AS-4R7M (4.7µH)
6
5
4
3
2
1
0
0
200
400
600
800
1000
1200
1400
A997AS-150M (15µH)
16
14
12
10
8
6
4
2
0
0
200
400
600
800
Inductance (
µH)
Inductance (
µH)
DC Current (mA)
DC Current (mA)
A997AS-5R6M (5.6µH)
Inductance (
µH)
6
5
4
3
2
1
0
0
200
400
600
800
1000
1200
1400
A997AS-180M (18µH)
20
18
16
14
12
10
8
6
4
2
0
0
100
200
300
400
500
600
700
Inductance (
µH)
7
DC Current (mA)
DC Current (mA)
A997AS-6R8M (6.8µH)
8
7
6
5
4
3
2
1
0
0
200
400
600
800
1000
1200
A997AS-220M (22µH)
24
22
20
18
16
14
12
10
8
6
4
2
0
0
100
200
300
400
500
600
700
Inductance (
µH)
DC Current (mA)
Inductance (
µH)
DC Current (mA)
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture
of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents
or other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
TOKO America, Inc.
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070 Fax: (847) 699-7864 Web: http://www.tokoam.com
January 2005
© 2005 TOKO America, Inc.
All Rights Reserved
Printed in USA
2
CF-272-DB318C
R-LOG0105A
FPGA/CPLD
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