## Technical Overview of FP1107R2-R51-R The **FP1107R2-R51-R** is a high-frequency, high-current power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **FP1107 series** and is specifically designed for multi-phase voltage regulator modules (VRMs). --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 510 nH (0.51 µH) | | **Tolerance** | ±10% | | **Current Rating ($I_{rms}$)** | 35 Amperes | | **Saturation Current ($I_{sat}$)** | 55 Amperes | | **DC Resistance (DCR)** | 0.44 mΩ (Max) | | **Operating Temp Range** | -40°C to +125°C | | **Package / Case** | 11.0mm x 7.2mm x 7.5mm (SMD) | --- ### 2. Physical Construction & Design The "FP" in the part number stands for **Flat-Pac**. This series uses a unique construction to maximize power density: * **Core Material:** Ferrite core material characterized by very low core losses, making it ideal for high-frequency switching. * **Format:** It features a vertical, surface-mount design that minimizes the PCB footprint while allowing for significant vertical height to accommodate high-gauge windings. * **Termination:** Lead-free, RoHS-compliant matte tin plating over copper. --- ### 3. Application Use Cases This component is primarily used in power management circuits where high efficiency and high current handling are critical. * **Voltage Regulator Modules (VRMs):** Used in CPUs, GPUs, and high-end FPGAs. * **Point-of-Load (POL) Converters:** For distributed power architectures. * **Data Centers:** Servers, storage systems, and networking hardware. * **Multi-phase Buck Converters:** It is often paired with identical inductors in parallel phases to provide stable current to high-performance processors. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **FP1107** | Series Name (Package size approx 11x7mm) | | **R2** | Version / Revision code | | **R51** | Inductance value (R51 = 0.51 µH) | | **-R** | RoHS Compliant | --- ### 5. Schematic Symbol & Footprint ```python # Typical Footprint Information for PCB Layout Dimensions_mm = { "Length": 11.0, "Width": 7.2, "Height": 7.5, "Pad_Width": 2.5, "Pad_Spacing": 4.5 } ```