FDU1250 Series
IRON POWDER SURFACE MOUNT FIXED INDUCTOR
TYPE FDU1250
Inductance Range:
0.50 - 1.50μH
Frequency Range:
0.1 - 5MHz
Description
The TOKO FDU1250 Series is a compact, high-current surface
mount fixed inductor with a maximum DC current rating of 27.2
Amps at 0.50μH. Manufactured with a proprietary iron powder
composition and process, the product is specifically designed for
high current, space constrained DC-DC converter applications
in portable computing, point-of-load modules, and computer
peripherals.
Dimensions and Recommended Footprint
½
½½½½½½½½
½½½
½
½½½
½
½½½½
½½½½
Unit: mm
Tolerance: ±0.3mm
Features
•
•
•
•
•
•
•
•
•
Compact size: 13.6mm x 12.4mm
Low profile: 5.0mm maximum
High DC current: 27.2A at 0.50μH
Magnetically shielded
Low DC resistance
Low audible noise
Reflow solderable
Packaged on 500 piece reels
Lead-free terminations
½½½
TOKO Part No.
FDU1250-R50M=P3
FDU1250-R56M=P3
A
13.3
13.3
13.3
13.3
13.2±0.4
B
8.3
8.3
8.3
8.3
8.2
C
3
3
3
3
3.1
D
7.9
7.9
7.9
7.9
7.7
½
½
½
½½½½½½½½½½
FDU1250-R75M=P3
FDU1250-1R0M=P3
FDU1250-1R5M=P3
STANDARD PARTS SELECTION GUIDE
(1) Inductance is measured by LCR-meter 4284A (Agilent) or equivalent.
(2) DC resistance is measured by Digital Multimeter 34420A (Agilent)
or equivalent.
(3) Maximum allowable DC current is that which causes a 20% inductance
reduction from the initial value, or coil temperature to rise by 40°C,
whichever is smaller. (Reference ambient temperature 20°C).
TYPE FDU1250
TOKO
Part
Number
FDU1250-R50M=P3
FDU1250-R56M=P3
FDU1250-R75M=P3
FDU1250-1R0M=P3
FDU1250-1R5M=P3
Inductance
(µH)
(1)
0.50
0.56
0.75
1.00
1.50
Tolerance
(%)
±20
±20
±20
±20
±20
Test
Inductance
DC
Freq. Resistance Decrease Current
(kHz) ( mΩ ) max.
(2)
[-20%] (A) max.
(3)
100
100
100
100
100
1.3
1.6
1.7
2.2
3.6
34.0
32.0
24.5
23.5
17.9
Temperature
Rise Current
[+40°C] (A) max.
(3)
27.2
25.7
25.2
21.2
18.2
Absolute
Max.
Voltage (V)
30
30
30
30
30
Note:
=P3
is added to each part number to indicate tape and reel packaging.
March 2006
© 2006 TOKO America, Inc.
All Rights Reserved
Printed in USA
CF-290-FDU1250
R-LOG0306A
1
FDU1250 Series
IRON POWDER SURFACE MOUNT FIXED INDUCTOR
Typical Characteristics
½
½½½½½½½½½½½½½µ½½
½½½
½
½½½
½
½½½
½
½
½½
½½
½½
½½
½½
½½½½½
½½½½½½
½½½½½½
½½½½½
½½½½½
½½½½½½½½½½½½½½½
Temperature Rise (°C)
50
40
30
20
10
0
0
10
20
30
40
50
60
½½½½½
½½½½½½
½½½½½½
½½½½½
½½½½½
DC Current (A)
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
March 2006
© 2006 TOKO America, Inc.
All Rights Reserved
Printed in USA
CF-290-FDU1250
R-LOG0306A
2
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