The **MP2A-1R0-R** is a high-performance, power inductor designed primarily for DC-DC converter applications. It belongs to the **MPI (Molded Power Inductor)** series, manufactured by **Eaton (formerly Cooper Bussmann)**. --- ### 1. General Specifications The part number can be broken down to understand its core characteristics: | Parameter | Specification | | :--- | :--- | | **Inductance** | 1.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~18.5 mΩ (Typical) / 21 mΩ (Max) | | **Isat (Saturation Current)** | 7.2 Amperes | | **Irms (Heating Current)** | 5.5 Amperes | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | MP2A (approx. 4.7 x 4.3 x 2.0 mm) | --- ### 2. Key Features and Construction * **Molded Construction:** The inductor is made using a metal powder molding process. This provides a "soft saturation" characteristic, meaning the inductance drops gradually rather than abruptly as current increases. * **Magnetic Shielding:** Because the coil is encased in iron powder resin, it is naturally shielded. This reduces Electromagnetic Interference (EMI) with surrounding components. * **Low Core Loss:** Optimized for high-frequency power supplies, reducing heat and increasing efficiency. * **Ruggedness:** The molded design offers excellent resistance to mechanical shock and vibration. --- ### 3. Common Applications This part is commonly used in high-density power electronics where space is limited but current requirements are high. 1. **Mobile Devices:** Smartphones, tablets, and handheld consoles. 2. **Computing:** Point-of-Load (POL) converters, VRMs for CPUs/GPUs, and SSD power rails. 3. **DC-DC Converters:** Buck, Boost, and SEPIC topologies. 4. **Battery Powered Systems:** Efficiency is critical here to extend battery life. --- ### 4. Selection Considerations When designing with the MP2A-1R0-R, keep the following in mind: * **Thermal Management:** The *Irms* rating is based on a 40°C temperature rise. Ensure your PCB layout has enough copper to dissipate heat. * **Saturation:** Ensure the peak inductor current in your circuit does not exceed the *Isat* rating to avoid a significant drop in inductance. * **Self-Resonant Frequency (SRF):** Check that your switching frequency is well below the SRF to ensure the part acts as an inductor and not a capacitor.