The **XF100705-R15M** is a high-performance, surface-mount (SMD) power inductor commonly used in voltage regulator modules (VRMs) and DC-DC converters. Below is a detailed technical breakdown of this electronic component. ### 1. General Specifications The part number typically breaks down into the series, physical dimensions, and electrical values. | Parameter | Value / Description | | :--- | :--- | | **Component Type** | Power Inductor (Molded/High Current) | | **Inductance** | 0.15 µH (indicated by "R15") | | **Tolerance** | ±20% (indicated by "M") | | **Footprint (L x W)** | Approx. 10.0 mm x 7.0 mm | | **Height** | Approx. 5.0 mm | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### 2. Key Electrical Characteristics These parts are engineered for high-frequency switching environments where efficiency and thermal management are critical. * **Saturation Current ($I_{sat}$):** This is the current level at which the inductance drops by a specified percentage (usually 20-30%). For a 0.15 µH inductor of this size, the $I_{sat}$ is typically very high (often 40A to 60A+). * **Heating Current ($I_{rms}$):** The continuous DC current that causes a specific temperature rise (usually 40°C) above ambient. * **DCR (DC Resistance):** Because the inductance is very low (0.15 µH), the DCR is exceptionally low (typically < 1 mΩ), minimizing power loss through heat. --- ### 3. Construction and Features * **Magnetic Shielding:** These inductors are usually "molded," meaning the coil is embedded in a metal iron powder composite. This provides excellent EMI (Electromagnetic Interference) shielding. * **Material:** The metal powder core allows for a soft saturation characteristic, preventing a sudden drop in inductance during current spikes. * **Environment:** They are designed to operate in high-temperature environments, often rated from -40°C up to +125°C or +150°C. --- ### 4. Common Applications Due to its low inductance and high current handling, the XF100705-R15M is found in: 1. **Motherboards/Servers:** Multi-phase VRMs powering CPUs and GPUs. 2. **Point of Load (POL) Converters:** High-efficiency DC-DC modules. 3. **Telecom Equipment:** Distributed power systems. 4. **Graphics Cards:** High-speed power delivery for video memory and cores. --- ### 5. Part Number Decoding The nomenclature usually follows this logic: `XF` (Series Prefix) + `100705` (Dimensions: 10x7x5mm) + `R15` (0.15 microhenries) + `M` (20% Tolerance).