## Technical Overview of MPI4040R3-2R2-R The **MPI4040R3-2R2-R** is a high-performance, power inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the MPI4040 series, which is characterized by its rugged, composite molded construction designed for high-density power applications. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 35 mΩ (Typical) / 41 mΩ (Maximum) | | **Isat (Saturation Current)** | 5.8 A (Typical) | | **Irms (Rated Current)** | 4.5 A (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 4.7mm x 4.06mm x 1.2mm (SMD) | | **Core Material** | Metal Powder (Pressed) | --- ### 2. Component Features * **Low Profile:** With a maximum height of 1.2mm, it is ideal for ultra-thin electronic devices such as tablets and smartphones. * **Magnetically Shielded:** The molded construction reduces Electromagnetic Interference (EMI), which is critical in sensitive wireless communication circuits. * **Soft Saturation:** Unlike traditional ferrite inductors, the metal powder core provides a gradual drop in inductance as current increases, preventing sudden circuit failure. * **High Efficiency:** Optimized for low core losses and low DCR to maximize battery life in portable electronics. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **MPI** | Product Series (Miniature Power Inductor) | | **4040** | Physical Dimensions (Approx. 4.0mm x 4.0mm) | | **R3** | Revision / Material version | | **2R2** | Inductance Value (2.2 µH) | | **-R** | RoHS Compliant / Lead-Free | --- ### 4. Typical Applications The MPI4040R3-2R2-R is commonly integrated into the following systems: 1. **DC-DC Converters:** Used in "Buck" or "Boost" regulators to manage power distribution. 2. **Mobile Devices:** Power management ICs (PMICs) for smartphones and wearables. 3. **Computing:** Voltage Regulator Modules (VRMs) for CPUs and GPUs in laptops. 4. **IoT Devices:** Providing stable power for sensors and low-power microcontrollers. ---