The **SRP7028CC-R22Y** is a high-current shielded power inductor manufactured by **Bourns**. It is designed specifically for high-frequency DC/DC converter applications where space is limited and high efficiency is required. ### 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of this component: | Parameter | Value | Notes | | :--- | :--- | :--- | | **Inductance** | 0.22 µH | Rated at 100 kHz / 1V | | **Tolerance** | ±20% | Standard for power inductors | | **DC Resistance (DCR)** | 2.1 mΩ (Typ) / 2.5 mΩ (Max) | Very low for high efficiency | | **Saturation Current ($I_{sat}$)** | 40.0 A | Current where inductance drops 30% | | **Heating Current ($I_{rms}$)** | 23.0 A | Current causing 40°C temp rise | | **Operating Temperature** | -55°C to +150°C | Includes self-heating | | **Package Size** | 7.3 x 6.6 x 2.8 mm | SMD (Surface Mount Device) | --- ### 2. Key Features and Construction * **Shielded Construction:** The inductor uses a magnetic alloy powder core that provides excellent EMI (Electromagnetic Interference) shielding, reducing noise interference with nearby components. * **Carbonyl Powder Core:** This material allows for high saturation currents and stable performance across a wide temperature range compared to standard ferrite cores. * **Low DCR:** The low internal resistance minimizes power loss due to heat, making it ideal for battery-powered devices. * **RoHS Compliant:** The part is lead-free and meets environmental safety standards. --- ### 3. Common Applications This specific inductor is typically found in: 1. **DC/DC Converters:** Used as the energy storage element in buck or boost regulators. 2. **Consumer Electronics:** Laptops, tablets, and high-end smartphones. 3. **Power Supplies:** Distributed power systems and VRMs (Voltage Regulator Modules) for CPUs/GPUs. 4. **Automotive:** (Note: Check if AEC-Q200 qualified if used in automotive safety systems). --- ### 4. Part Number Breakdown The part number follows a specific nomenclature: * **SRP:** Product Series (High Current Shielded Inductor). * **7028:** Physical Dimensions (~7mm x 7mm footprint, 2.8mm height). * **CC:** Material/Designator code. * **R22:** Inductance value (R22 = 0.22 µH). * **Y:** Tolerance (Y = ±20%).