The **SCIHP0420-R20** is a high-current, SMD (Surface Mount Device) power inductor. It belongs to a category of "molded" inductors designed for high-density power applications where space is limited and efficiency is critical. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its physical and electrical properties: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.20 µH (R20) | | **Tolerance** | ±20% | | **Case Size** | 0420 (Approx. 4.0 x 4.0 x 2.0 mm) | | **DCR (Direct Current Resistance)** | Very low (typically ~3.5 to 4.5 mΩ) | | **Saturation Current (Isat)** | High (typically 12A - 15A range) | | **Operating Temperature** | -55°C to +125°C | --- ### 2. Physical Construction The "HP" in the series usually refers to **High Power** or **High Performance**. * **Core Material:** Magnetic metal powder (Iron powder). This allows for a "soft" saturation characteristic, meaning the inductance doesn't drop off instantly when current increases. * **Shielding:** It is a **shielded** design. Because the coil is molded directly into the metal powder body, it has excellent EMI (Electromagnetic Interference) shielding. * **Terminals:** Lead-free (RoHS compliant) construction with solderable pads on the bottom. --- ### 3. Key Electronic Functions * **Energy Storage:** It stores energy in its magnetic field during the "on" cycle of a switching regulator and releases it during the "off" cycle. * **Filtering:** Acts as a low-pass filter to smooth out high-frequency ripple current in power supplies. * **Voltage Regulation:** Essential for DC-DC converters (Buck, Boost, or Buck-Boost topologies). --- ### 4. Typical Applications Due to its low profile and high current handling, the SCIHP0420-R20 is commonly found in: 1. **Laptops and Tablets:** For CPU/GPU core power rails (Vcore). 2. **Point of Load (POL) Converters:** Converting a higher voltage (like 12V) down to a lower voltage (like 1.2V) at high currents. 3. **High-density Power Modules:** Where thermal management and space are tight. 4. **Servers and Networking:** For high-efficiency power distribution. ---