LTF5022T-1R2N4R2-LC TDK Inductor (Other) In Stock
The LTF5022T-1R2N4R2-LC is a 1.2 µH SMD power inductor from TDK featuring a ferrite core in a compact 2020 (5 mm x 5 mm) rectangular case with a typical DCR of only 25 mΩ for low conduction losses. It supports a 4.2A rated current for high-efficiency DC-DC converter output stages. Ideal for step-down buck regulators, point-of-load converters, and mobile CPU core power supplies.
- Manufacturer
- TDK
- Package
- Other
- Pin Count
- 2
- Lifecycle
- OBSOLETE
- Datasheet
- LTF5022T-1R2N4R2-LC Datasheet PDF
- Category
- Inductor
- Temp Range
- -40.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1.2 µH inductance with 25 mΩ typical DCR minimizing conduction losses in high-current buck converter output stages
- 4.2A rated current handling supporting point-of-load converters powering modern microprocessors and SoCs
- Compact 2020 (5 mm x 5 mm) ferrite-core construction enabling high power density on mobile and server platform PCBs
- Shielded rectangular construction reducing EMI radiation from switching currents in noise-sensitive RF and audio adjacent designs
- Lead-free (Pb-free) construction meeting RoHS compliance requirements for consumer and industrial electronics manufacturing
Applications
The LTF5022T-1R2N4R2-LC is used as the energy-storage element in high-frequency synchronous buck converters supplying CPU core, GPU, or LPDDR memory rails on mobile and embedded computing platforms where the 25 mΩ DCR keeps conduction losses below 0.5W at 4A load. Its 5 mm x 5 mm 2020 footprint fits within dense point-of-load regulator layouts on multi-layer server and networking boards alongside GaN or MOSFET gate driver stages. Industrial power supply designers also select it for 3.3V and 5V rail buck stages in compact DIN-rail power modules where high current density and low profile are critical.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Case/Size Code | 2020 |
| Construction | Rectangular |
| Core Material | FERRITE |
| DC Resistance | 0.025Ω |
| Inductance-Nom (L) | 1.2 µH |
| Inductor Application | POWER INDUCTOR |
| Inductor Type | GENERAL PURPOSE INDUCTOR |
| Number of Functions | 1 |
| Package Height | 2.2mm |
| Package Length | 5.2mm |
| Package Style | SMT |
| Package Width | 5mm |
| Packing Method | TR, Embossed Plastic, 7 Inch |
| Rated Current-Max | 4.2A |
| Shape/Size Description | RECTANGULAR PACKAGE |
| Shielded | YES |
| Surface Mount | YES |
| Terminal Placement | DUAL ENDED |
| Terminal Shape | WRAPAROUND |
| Test Frequency | 0.1MHz |
| Tolerance | 30% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8504.50.80.00 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 25 mΩ DCR of the LTF5022T-1R2N4R2-LC affect efficiency in a 4A CPU core power supply?
At 4A output current, the 25 mΩ DCR of the LTF5022T-1R2N4R2-LC dissipates only 0.4W as heat (P = I² × R = 16 × 0.025), contributing minimal thermal loss to the converter's efficiency budget and allowing a compact heat management strategy without additional thermal vias or heat spreaders.
For a high-density server PCB with a 2 MHz switching buck regulator, how does the 1.2 µH inductance of the LTF5022T-1R2N4R2-LC influence output ripple current?
At 2 MHz switching frequency with a 12V-to-1V conversion, the 1.2 µH inductance limits peak-to-peak ripple current to approximately 4.2A peak, which is manageable for most CPU rail decoupling designs and allows use of smaller output capacitors compared to lower-frequency designs using 4.7 µH inductors.
Is the LTF5022T-1R2N4R2-LC a direct replacement for the TDK 810-LTF5022T1R2N3R4D in an existing buck converter layout?
TDK lists the LTF5022T-1R2N4R2-LC as the recommended alternative to the LTF5022T1R2N3R4D; both share the 1.2 µH inductance, 2020 case size, and ferrite core construction, so the PCB footprint is compatible, but engineers should verify the rated current (4.2A) and DCR (25 mΩ) match their power budget before substitution.
Which PCB area does the LTF5022T-1R2N4R2-LC occupy and how does that compare to a conventional 7330 power inductor for a mobile platform buck stage?
The 2020 case measures 5 mm x 5 mm, occupying 25 mm² of PCB area, whereas a standard 7330 (7.3 mm x 7.3 mm) inductor requires 53 mm², so switching to the LTF5022T-1R2N4R2-LC at 1.2 µH and 4.2A current rating saves over 50% board area in mobile CPU power delivery designs.
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