## SD14-2R5-R Technical Overview The **SD14-2R5-R** is a high-power density, low-profile SMT (Surface Mount Technology) power inductor manufactured by Eaton (formerly Bussmann). It is part of the SD series, known for its shielded drum core construction. ### 1. Key Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 2.5 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 45.4 mΩ (Nominal) | | **Irms (Root Mean Square Current)** | 2.21 A | | **Isat (Saturation Current)** | 2.62 A | | **Dimensions** | 5.2mm x 5.2mm x 1.45mm | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Construction & Features * **Shielded Design:** The inductor is magnetically shielded. This minimizes Electromagnetic Interference (EMI), making it suitable for noise-sensitive circuits and high-density PCB layouts. * **Low Profile:** With a height of only 1.45mm, it is designed for compact electronic devices where vertical space is limited. * **Ferrite Core:** Utilizes a ferrite drum core which provides high efficiency and low core losses at high frequencies. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and complies with RoHS standards. --- ### 3. Application Areas The SD14-2R5-R is typically used in power management stages for the following devices: 1. **Mobile Electronics:** Smartphones, tablets, and handheld GPS units. 2. **DC-DC Converters:** Buck, Boost, and SEPIC topologies. 3. **Buck Regulators:** Providing stable voltage rails for CPUs and FPGAs. 4. **Battery Powered Equipment:** Due to its high efficiency and small footprint. --- ### 4. Important Considerations for Design * **Saturation Current ($I_{sat}$):** This is the current level at which the inductance drops by a specified percentage (usually 30%). Ensure your peak circuit current does not exceed 2.62A to avoid performance degradation. * **Thermal Management ($I_{rms}$):** The $I_{rms}$ rating (2.21A) is based on a temperature rise of approximately 40°C. Ensure the PCB has adequate copper traces to help dissipate heat.