### Overview of MPI5451R1-2R2-R The **MPI5451R1-2R2-R** is a high-performance, high-current power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the MPI (Molded Power Inductor) series, which is designed for applications requiring high power density and low electromagnetic interference (EMI). --- ### Technical Specifications The following table outlines the key electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 7.2 Amperes (typical) | | **Saturation Current (Isat)** | 8.0 Amperes (typical) | | **DC Resistance (DCR)** | 14.5 mΩ (typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 5.7mm x 5.4mm x 1.2mm (SMD) | | **Construction** | Metal Composite (Shielded) | --- ### Key Features * **Shielded Construction:** The molded metal powder construction provides inherent magnetic shielding, which significantly reduces EMI compared to unshielded inductors. * **High Current Density:** Despite its small footprint (5.4mm x 5.7mm) and very low profile (1.2mm height), it handles high saturation currents. * **Soft Saturation:** Unlike ferrite core inductors that drop inductance sharply at peak currents, this series features a "soft" saturation curve, making it more stable under transient loads. * **Rugged Design:** The molded body protects the internal windings from environmental factors and mechanical stress. --- ### Common Applications The MPI5451R1 series is primarily used in DC-DC converters where space is limited but power requirements are high. 1. **Mobile Devices:** Smartphones, tablets, and handheld consoles. 2. **Computing:** Notebooks, ultrabooks, and VR/AR headsets. 3. **Power Modules:** Point-of-Load (PoL) converters and voltage regulator modules (VRMs). 4. **Distributed Power Systems:** Low-profile power supplies for IoT devices. --- ### Component Part Number Breakdown The part number can be decoded as follows: * **MPI:** Molded Power Inductor Series. * **5451:** Physical dimensions (approx. 5.4mm x 5.1mm footprint). * **R1:** Revision or height code (1.2mm height). * **2R2:** Inductance value (2.2 microhenries). * **R:** RoHS compliant/Standard packaging.