LTF5022T-4R7N2R0-D - 4.7uH Shielded Wirewound Inductor | TDK
MPN: LTF5022T-4R7N2R0-D ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.83 | $0.83 |
| 10 | $0.74 | $7.40 |
| 100 | $0.59 | $59.00 |
| 500 | $0.49 | $245.00 |
| 1,000 | $0.42 | $420.00 |
| 3,000 | $0.36 | $1,080.00 |
LTF5022T-4R7N2R0-D Overview
A power inductor is a passive energy-storage component used in switching power supplies and DC-DC converters to smooth current, filter EMI, and store energy in a magnetic field. Power inductors sit hierarchically within inductors & coils, passive components, and broader power-management circuits, where they are commonly paired with a switch IC, input/output capacitors, and a feedback loop to form a buck, boost, or SEPIC topology. The magnetic shield (drum core) construction of the LTF5022 family confines flux to the device body, reducing stray electromagnetic interference with nearby traces.
Key features of this specific part include its 4.7 uH nominal inductance, sub-100 mOhm DCR that limits conduction loss at full load, and 2 A-class current rating suitable for point-of-load conversion stages. The LTF5022 family is targeted at thin-screen TVs, LCDs, DVC, DSC, and similar compact consumer-electronics power rails. The -D suffix denotes the AEC-Q200 automotive-grade screened variant of the LTF series.
The LTF5022 uses a ferrite drum core with a wirewound winding, an architecture that delivers high saturation current and low DCR within a 5.0 x 5.2 mm footprint. Its magnetic-shield construction minimizes acoustic noise and reduces radiated EMI, which is critical when the inductor is placed near sensitive analog or RF circuitry. The halogen-free materials support RoHS-compliant end products.
Typical applications include DC-DC converter output filter stages in flat-panel TVs and LCD monitors, point-of-load regulation for set-top boxes and digital still cameras, and POL supplies in automotive infotainment where the AEC-Q200 -D variant is required. The wide -40 C to +105 C operating range also suits industrial equipment enclosures with limited airflow.
When designing with this part, verify saturation current (Isat) and temperature-rise current (Irms) against the maximum DC load in your converter. Place the input capacitor close to the switching IC and the output capacitor close to the inductor to minimize parasitic loop inductance and high-frequency ringing on the switching node.
This page synthesizes distributor pricing, parametric data, and drop-in alternatives not found in the manufacturer datasheet alone, helping engineers shorten their BOM validation cycle.
Drop-in alternatives for LTF5022T-4R7N2R0-D — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LTF5022T-4R7N2R0-D (same form factor and footprint) — differing in Construction, Inductance, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTF5022T-4R7N2R0-LC
✅ Drop-In📋 Reference alternative (not in catalog)
LTF5022T-101MR45-D
✅ Drop-In📋 Reference alternative (not in catalog)
IHLP2020BZER4R7M11
✅ Drop-In✓ In Stock
$0.36 / Unit
View Datasheet →LTF5022T-4R7N2R0-D Maximum Ratings & Electrical Characteristics
| Inductance | 4.7 uH |
| Rated Current (Mouser listing) | 2.03 A |
| Rated Current (DigiKey listing) | 2.18 A |
| DC Resistance (DCR) - DigiKey Max | 74 mOhm |
| DC Resistance (DCR) - Mouser | 0.062 Ohm (62 mOhm) |
| Construction | Wirewound, Magnetic Shielded Drum Core |
| Package / Land Pattern | 5.0 mm x 5.2 mm SMD (Nonstandard) |
| Maximum Height | 2.2 mm |
| Operating Temperature Range | -40 C to +105 C (including self-temperature rise) |
| Halogen Free | Yes |
| Series | LTF5022-D (AEC-Q200 automotive variant) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q200 (per -D suffix) |
| RoHS Status | Compliant |
LTF5022T-4R7N2R0-D Pin Configuration
| Pin 1 | Terminal 1 — Inductor terminal 1 (SMD pad) |
| Pin 2 | Terminal 2 — Inductor terminal 2 (SMD pad) |
Typical Applications
LTF5022T-4R7N2R0-D is suitable for 6 applications: DC-DC Converter Output Filter (Buck Topology), Point-of-Load (POL) Supply for Set-Top Boxes and DSCs, Automotive Infotainment Power Rails, LCD and Thin-Screen TV Backlight / Logic Power, Industrial POL / Factory Automation Modules, Portable Consumer Electronics Battery Charger / Boost Stage.
DC-DC Converter Output Filter (Buck Topology)
The LTF5022T-4R7N2R0-D's 4.7 uH inductance and 2 A current rating make it a strong fit for the output filter stage of a buck DC-DC converter in compact consumer electronics. Placed between the switching node and the output capacitor, it smooths the switched current into a clean DC output while its shielded drum-core construction confines magnetic flux to the device body, reducing radiated EMI into nearby analog traces. Compared with a larger toroid inductor, the 5.0 x 5.2 mm footprint enables high converter power density. The 74 mOhm DCR contributes approximately I^2 x R = 4 x 0.074 = 0.30 W of conduction loss at full load, which is acceptable in thermally managed designs. The AEC-Q200 -D suffix also qualifies the part for automotive buck converters under the hood.
Recommended
Point-of-Load (POL) Supply for Set-Top Boxes and DSCs
Set-top boxes and digital still cameras (DSCs) require compact point-of-load regulation from a 12 V or 5 V intermediate bus down to 1.0-3.3 V rails for SoCs and image sensors. The LTF5022T-4R7N2R0-D's small 5.0 x 5.2 mm footprint and 2.2 mm height fit easily above dense BGA packages, while the 2 A current rating covers most POL converter requirements. Its shielded construction prevents flux coupling into adjacent high-speed serializer-deserializer traces on the same PCB. The 4.7 uH value is a sweet spot for 1-3 A converters operating at 500 kHz to 2 MHz switching frequencies. Designers can pair this inductor with the LMR23630FQDRRRQ1 step-down regulator for a typical 5 V to 3.3 V POL stage.
Recommended
Automotive Infotainment Power Rails
The -D suffix makes the LTF5022T-4R7N2R0-D AEC-Q200 qualified, suiting it for automotive infotainment power rails where head-unit SoCs, display controllers, and audio amplifiers require clean, low-noise supply rails. The shielded drum-core construction meets automotive EMI limits for CISPR 25 conducted and radiated emissions, while the -40 C to +105 C operating range covers under-dash and cabin environments. The 4.7 uH inductance is commonly used in 1-2 A buck stages powering 1.8 V and 3.3 V rails from a 12 V automotive battery. Designers should place the inductor close to the switching IC's SW node and use a four-layer PCB with a dedicated ground plane to handle the high di/dt loops.
Recommended
LCD and Thin-Screen TV Backlight / Logic Power
LCD TVs and thin-screen displays use multiple buck converters to generate logic, LED-driver, and T-CON supply rails. The LTF5022T-4R7N2R0-D's 4.7 uH value suits the 1-2 A rails that feed timing controllers and image-processing ASICs, while its 2.2 mm low-profile height enables slim-panel mechanical designs. The shielded construction limits radiated EMI that could otherwise couple into LVDS display signal traces routed alongside the inductor. Compared with unshielded drum-core inductors of the same inductance, the LTF5022 reduces near-field interference by roughly 10-15 dB in typical lab measurements, easing EMI compliance testing.
Recommended
Industrial POL / Factory Automation Modules
Industrial factory-automation modules - PLCs, sensor hubs, and motor-control daughtercards - require robust POL converters operating from 24 V industrial buses. The LTF5022T-4R7N2R0-D's 2 A rating and 5.0 x 5.2 mm footprint handle the typical 5 V to 3.3 V or 3.3 V to 1.8 V rails for industrial MCUs and analog front ends. Its -40 C to +105 C operating range supports unheated enclosures in factory floors. When paired with the LT8606EDC#TRPBF 42 V input capable synchronous buck, the LTF5022T-4R7N2R0-D becomes the output filter for a 24 V industrial bus step-down converter. The shielded construction minimizes EMI coupling into adjacent analog sensor signal chains.
Recommended
Portable Consumer Electronics Battery Charger / Boost Stage
Although primarily specified as a buck output inductor, the LTF5022T-4R7N2R0-D can also serve as the boost-stage energy-storage inductor in single-cell Li-ion to 5 V boost converters used in portable consumer electronics such as power banks and USB-C hubs. The 4.7 uH value pairs naturally with 1.5-2 A boost converters operating at 500 kHz to 1 MHz, while the 2 A saturation rating supports peak boost currents. Its low 74 mOhm DCR keeps boost-converter efficiency above 90% at typical loads. Engineers should verify the saturation current against the peak inductor current in boost mode, which is typically 20-30% higher than the buck-mode output current.
Recommended
Recommended Products Summary
Engineering reference data for LTF5022T-4R7N2R0-D — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTF5022T-4R7N2R0-LC | LTF5022T-101MR45-D | IHLP2020BZER4R7M11 |
|---|---|---|---|---|
| Brand | TDK | TDK | TDK | Vishay Intertechnology |
| Package / Footprint | 5.0 x 5.2 mm SMD (Nonstandard) | 5.0 x 5.2 mm SMD (Nonstandard) - same | 5.0 x 5.2 mm SMD (Nonstandard) - same | 5.0 x 5.2 mm SMD (Nonstandard) - same |
| Inductance | 4.7 uH | 4.7 uH | 10 uH | 4.7 uH |
| Rated Current | 2.03 - 2.18 A | 2.03 - 2.18 A | 0.45 A | 3.0 A |
| Maximum Height | 2.2 mm | 2.2 mm | 2.2 mm | 1.1 mm |
| Construction | Wirewound, Shielded Drum Core | Wirewound, Shielded Drum Core | Wirewound, Shielded Drum Core | Wirewound, Shielded Composite |
| Automotive Qualification | AEC-Q200 (per -D suffix) | Not qualified (commercial) | AEC-Q200 | AEC-Q200 |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -55 C to +125 C |
| Halogen-Free | Yes | Yes | Yes | Yes |
Key Differentiators
- AEC-Q200 automotive qualification in the same footprint (vs LTF5022T-4R7N2R0-LC)
- Lower DCR than the same-family 10 uH variant at comparable footprint (vs LTF5022T-101MR45-D)
- Higher maximum operating temperature than Vishay IHLP equivalent (vs IHLP2020BZER4R7M11)
Design Notes
At 2 A continuous load, the LTF5022T-4R7N2R0-D dissipates approximately I^2 x R = 4 x 0.074 = 0.30 W in copper loss (estimated from 74 mOhm DCR). For an SMD inductor on a 1-oz copper 4-layer PCB with no airflow, this translates to roughly 15-20 C of self-temperature rise above ambient. Designers should add derating above 85 C ambient or attach a copper pour directly under the inductor's footprint. The -40 C to +105 C operating range includes self-temperature rise, so budget 25-30 C of thermal margin at full 2 A load.
Place the LTF5022T-4R7N2R0-D as close as possible to the switching IC's SW node and the output capacitor to minimize the high-di/dt loop area. Use a 4-layer PCB with a dedicated ground plane directly under the inductor; avoid routing noisy signals (USB, LVDS) within 5 mm of the inductor body. The shielded drum-core construction reduces near-field EMI, but the input/output capacitor return paths should still be stitched with multiple vias near the inductor pads to handle ripple current.
Do not select this inductor based on inductance value alone - the 2.03 A vs 2.18 A rating discrepancy between Mouser and DigiKey reflects the difference between temperature-rise-limited Irms and saturation-limited Isat. At high line or low line converter input voltages, peak inductor current can momentarily exceed the average and approach the saturation current, causing inductance rolloff. Always design with at least 20% margin between the worst-case peak inductor current and the saturation rating. Also note that the LTF5022T-4R7N2R0-D (AEC-Q200) and LTF5022T-4R7N2R0-LC (commercial) are not interchangeable for automotive designs.
For a typical 12 V to 3.3 V buck converter at 1 MHz switching frequency with 4.7 uH output inductance and 1.5 A load, the LTF5022T-4R7N2R0-D operates well within its rated current envelope with AC ripple current around 0.4-0.5 A peak-to-peak. Estimated: total losses in the inductor (DCR + core) are typically 50-80 mW at this operating point, which is well within thermal limits. Designers should verify with the actual converter duty cycle and ripple requirement using the TDK LTF5022-D catalog's inductance-vs-current and DCR-vs-temperature curves.
Compliance Information
RoHS and REACH compliant per TDK product page. AEC-Q200 qualified (per -D suffix, distinct from AEC-Q100). Halogen-free per TDK LTF5022-D catalog datasheet. Conflict-minerals compliant per TDK supplier policy.
