The CD3521 is specifically designed for space-constrained portable devices. With its compact 3.5 mm × 3.0 mm footprint and a low 2.1mm profile, it is a popular small inductor for high-density boards. It offers a great balance of low DCR (down to 0.023Ω) and high saturation current (up to 4.0A), making it a reliable choice for any high frequency inductor application. This SMD Power Inductor also features an attractive inductor price point for cost-sensitive applications.
Key Features
Compact Design: 3.5(A) × 3.0(C) × 2.1(B) mm small footprint.
Rugged Construction: Ferrite drum core with metallization for high shock resistance.
Cost-Effective: Reliable performance for cost-sensitive applications.
Low DC Resistance (DCR) with excellent current handling.
Excellent Solderability & High Heat Resistance.
RoHS Compliant.
Applications
The CD3521 series' small size makes it an ideal SMD Power Inductor for DC-DC converters, especially in:
Mobile phones, PDAs, MP3 players
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>>
DSC/DVC (Digital Still/Video Cameras)
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Portable DVD and gaming devices
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Notebooks, desktop computers
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LED Lighting
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Electrical Characteristics
|
Part No. |
Inductance (L) (µH) |
Test Frequency (kHz/Volt) |
DCR (Ω) MAX. |
Saturation Current (Isat) (A) MAX. |
|
CD3521-R56M |
0.56 ± 20% |
100/0.25 |
0.023 |
4.00 |
|
CD3521-1R0M |
1.0 ± 20% |
100/0.25 |
0.040 |
3.20 |
|
CD3521-1R5M |
1.5 ± 20% |
100/0.25 |
0.055 |
2.80 |
|
CD3521-2R2M |
2.2 ± 20% |
100/0.25 |
0.070 |
2.50 |
|
CD3521-2R7M |
2.7 ± 20% |
100/0.25 |
0.078 |
2.00 |
|
CD3521-3R3M |
3.3 ± 20% |
100/0.25 |
0.090 |
1.83 |
|
CD3521-3R9M |
3.9 ± 20% |
100/0.25 |
0.125 |
1.60 |
|
CD3521-4R7M |
4.7 ± 20% |
100/0.25 |
0.140 |
1.50 |
|
CD3521-6R8M |
6.8 ± 20% |
100/0.25 |
0.230 |
0.95 |
|
CD3521-8R2M |
8.2 ± 20% |
100/0.25 |
0.250 |
0.92 |
|
CD3521-100K |
10 ± 10% |
100/0.25 |
0.270 |
0.90 |
|
CD3521-150K |
15 ± 10% |
100/0.25 |
0.400 |
0.75 |
|
CD3521-180K |
18 ± 10% |
100/0.25 |
0.480 |
0.70 |
|
CD3521-220K |
22 ± 10% |
100/0.25 |
0.580 |
0.60 |
|
CD3521-330K |
33 ± 10% |
100/0.25 |
0.920 |
0.55 |
|
CD3521-420K |
42 ± 10% |
100/0.25 |
1.200 |
0.50 |
|
CD3521-470K |
47 ± 10% |
100/0.25 |
1.270 |
0.45 |
|
CD3521-680K |
68 ± 10% |
100/0.25 |
2.000 |
0.30 |
|
CD3521-101K |
100 ± 10% |
100/0.25 |
2.800 |
0.20 |
Notes:
Test Conditions: All test data is referenced to 25°C ambient.
Operating Temperature Range: -40°C to +125°C.
Isat (Saturation Current): DC current (A) that will cause L₀ to drop approximately 10%.
Temperature Limit: The part temperature (ambient + temp rise) should not exceed 125°C under worst-case operating conditions.
Shape and Dimensions
Packaging
Packaging: Embossed Carrier Tape
Reel Diameter (A): 330 mm
Tape Width (W): 12 mm
Quantity/Reel: 3000 pcs
Solder Reflow Profile
Preheat condition: 150~200°C / 60~120 sec.
Allowed time above 217°C: 60~90 sec.
Max temp: 260°C
Max time at max temp: 10 sec.
Allowed Reflow time: 2x max
Solder paste: Sn/3.0Ag/0.5Cu
(Note: This profile is for qualification only and not meant to specify board assembly profiles. Actual profiles must be based on the customer's specific board design and process.)
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