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LPS4018-222MLC

2.2uH shielded power inductor, 3.8A Isat, 30mOhm DCR, 4018 (4x4x1.8mm) for DC-DC converters

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Manufacturer Part：

LPS4018-222MLC

Package：

4018 (4.00 x 4.00 x 1.80 mm)

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Description

Product Overview

The LPS4018-222MLC from Coilcraft is a shielded SMD power inductor in a 4018 (4.0×4.0x1.8mm) package. It provides 2.2uH inductance with 3.8A saturation current and 30mOhm maximum DCR, making it ideal for DC-DC converter output filtering in compact power supply designs.

Key Specifications

Inductance 2.2uH (220 = 22 x 10^1 nH)
Tolerance +/-20% (M suffix)
Saturation Current (Isat) 3.8A (Typical, @ 30% inductance drop)
Rated Current (Irms) 3.2A (Typical, @ 40°C temperature rise)
DCR (Max) 30mOhm
Self-Resonant Frequency (SRF) 60MHz (Minimum)
Shielded Yes
Package 4018 (4.0 x 4.0 x 1.8mm)
Operating Temperature -40°C ~ +125°C

Features

  • Magnetically shielded construction minimizes EMI
  • Low 30mOhm DCR for high efficiency DC-DC converters
  • 3.8A saturation current supports high-output converters
  • Compact 4018 footprint with 1.8mm profile
  • High SRF of 60MHz minimum for high-frequency applications
  • RoHS compliant with tape and reel packaging (LC suffix)

Applications

  • DC-DC converter output inductors
  • Point-of-load (POL) power modules
  • FPGA and CPU core voltage regulators
  • Portable device power management
  • Industrial buck and boost converter filters

The LPS4018-222MLC from Coilcraft is a magnetically shielded surface-mount power inductor in a compact 4018 (4.0 x 4.0 x 1.8mm) package. The shielded construction contains the magnetic flux within the component, minimizing EMI coupling to adjacent circuitry. The 2.2uH inductance value with +/-20% tolerance is suitable for a wide range of buck and boost converter designs operating at frequencies from 500kHz to several MHz. The 3.8A saturation current ensures the inductor maintains its value under peak load conditions, while the 30mOhm maximum DCR minimizes conduction losses for high efficiency. The 60MHz minimum self-resonant frequency provides comfortable margin for switching frequencies up to 5MHz. The LC suffix indicates tape and reel packaging for automated SMT assembly.

The LPS4018-222MLC operates as an energy storage element in switching DC-DC converters. During the switch on-time, current flows through the inductor and energy is stored in the magnetic field of the ferrite core. During the switch off-time, the stored energy is released to the load as the magnetic field collapses, maintaining continuous current flow. The inductor value (2.2uH) determines the ripple current magnitude for a given switching frequency and input/output voltage ratio. The saturation current (3.8A) represents the DC current at which the ferrite core begins to saturate, causing the inductance to drop by 30%. The DCR (30mOhm) represents the DC resistance of the winding wire and determines the I-squared-R conduction losses. The shielded construction uses a magnetic shield layer over the winding to contain stray flux lines.

Pin Name Function
1 Terminal 1 Inductor winding connection (non-polarized)
2 Terminal 2 Inductor winding connection (non-polarized)
  • Buck Converter Output Inductor: 2.2uH suits 1-3MHz buck converters generating 1.2-3.3V at 2-3A from 5V input; 30mOhm DCR achieves >95% inductor efficiency
  • FPGA Core Voltage Regulator: Shielded construction prevents EMI coupling to high-speed FPGA traces; 1.8mm profile fits under FPGA heat sink
  • Portable Device POL Converter: Compact 4x4mm footprint with 1.8mm height fits in smartphone thickness budget; shielded for Wi-Fi/BT coexistence
  • Multi-phase Buck Inductor: 3.8A Isat supports per-phase current in 2-phase CPU core regulators
Model Manufacturer Key Difference
LPS4018-103MLC Coilcraft 10uH, 1.7A Isat, same package
XAL4020-222MEB Coilcraft 2.2uH, 5.2A Isat, 4x4x2mm
SRR4018-220M Bourns 22uH, 1.7A, 4x4x1.8mm
IHLP-4040DZ-01 Vishay 2.2uH, 6.5A, 4x4x2mm
DFE402012PD-2R2M Murata 2.2uH, 4.5A, 4x2x1.2mm
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Service & Packaging

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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