The **FP1006R1-R08-R** is a high-current, low-profile power inductor manufactured by Eaton (formerly Cooper Bussmann). It belongs to the **FP1006 Series** and is specifically designed for high-frequency voltage regulator modules (VRMs). --- ### 1. Key Technical Specifications | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 85 nH (Nanohenries) | | **Tolerance** | ±10% | | **Current Rating (Irms)** | 53 Amps | | **Saturation Current (Isat)** | 85 Amps (at 25°C) | | **DC Resistance (DCR)** | 0.29 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 10.0mm x 6.4mm x 6.0mm (Surface Mount) | --- ### 2. Design and Construction The "FP" in the part number stands for **Flat-Pac**. This series uses a unique core geometry and winding technique: * **Ferrite Core Material:** Ensures low core losses at high switching frequencies (up to several MHz). * **Vertical Mount Design:** The "R1" designation refers to a specific pad layout that minimizes the footprint on the PCB while providing high current density. * **RoHS Compliant:** The "-R" suffix at the end indicates compliance with lead-free/RoHS standards. --- ### 3. Functional Role in Electronics This component is primarily used in **Multi-phase Buck Converters**. Its main functions include: 1. **Energy Storage:** It stores energy in its magnetic field during the "on" cycle of a switching regulator and releases it during the "off" cycle. 2. **Filtering:** It works with output capacitors to smooth the ripple current, providing a steady DC voltage to sensitive components. 3. **Current Sensing:** In many modern VRMs, the low DCR of this inductor is used to sense the load current for feedback loops. --- ### 4. Typical Applications * **Computing:** Server and desktop CPUs (Voltage Regulator Modules). * **Graphics:** High-end GPUs for gaming and AI processing. * **Networking:** Routers, switches, and high-speed data centers. * **Industrial:** Point-of-load (POL) converters. ---