The **MP220P-R100-D** is a specialized high-performance power inductor, typically manufactured by companies like **Eaton (formerly Coiltronics)** or similar high-reliability magnetics suppliers. It belongs to the **MPI4040** or **MP** series of miniature power inductors. --- ## 1. Technical Specifications Below are the key electrical and physical parameters for the **MP220P-R100-D**: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 0.10 µH (R100) | Nominal inductance at 0A DC current. | | **Tolerance** | ±20% | Standard manufacturing variance. | | **DC Resistance (DCR)** | ~0.70 to 1.1 mΩ | Ultra-low resistance to minimize power loss. | | **Rated Current (Irms)** | ~25A - 32A | Current causing a 40°C temperature rise. | | **Saturation Current (Isat)** | ~40A - 50A | Current where inductance drops by 30%. | | **Shielding** | Magnetically Shielded | Reduces Electromagnetic Interference (EMI). | | **Footprint** | 4.0mm x 4.0mm | Compact surface-mount design. | --- ## 2. Part Number Breakdown The nomenclature provides specific details about the component's build: * **MP:** Series designation (High-frequency, high-current power inductor). * **220P:** Physical size code (relating to the mold dimensions and height). * **R100:** Inductance value. **R** acts as a decimal point. `0.100 µH`. * **D:** Tolerance or Revision code (typically indicating specific packaging or standard tolerance). --- ## 3. Key Electronic Characteristics ### High Frequency Performance This part is designed for high-switching frequency DC-DC converters (typically **1MHz to 5MHz**). Because the inductance is very low (0.10 µH), it allows for very fast transient responses in power circuits. ### Core Material It usually utilizes a **Metal Composite/Powder core**. Unlike traditional ferrite cores, metal powder cores have a "soft saturation" characteristic. This means the inductor doesn't lose its inductance abruptly when the current exceeds the limit, preventing sudden circuit failure. ### Low DCR (DC Resistance) The "R100" variant is optimized for efficiency. With a DCR often below 1.5 milliohms, it generates very little heat even when conducting high currents, making it ideal for battery-powered devices. --- ## 4. Typical Applications The MP220P-R100-D is commonly found in: 1. **Voltage Regulator Modules (VRM):** Specifically for CPUs and GPUs in laptops. 2. **Point-of-Load (POL) Converters:** Converting 5V or 12V rails down to 1.0V-1.8V. 3. **High-Density Power Supplies:** Where board space is limited but current demand is high. 4. **Handheld Devices:** Smartphones and tablets requiring high-efficiency power stages.