### Overview of SD3110-2R2-R The **SD3110-2R2-R** is a high-power density, low-profile shielded drum core inductor manufactured by **Eaton (formerly Bussmann)**. It is specifically designed for space-constrained applications requiring high efficiency and low electromagnetic interference (EMI). --- ### Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.088 Ohms (Max) | | **Saturation Current ($I_{sat}$)** | 1.26 A | | **RMS Current ($I_{rms}$)** | 1.48 A | | **Shielding** | Shielded (Magnetic) | | **Mounting Type** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +125°C | --- ### Physical Dimensions The "3110" in the part number refers to the physical footprint of the component: * **Length:** 3.1 mm * **Width:** 3.1 mm * **Height:** 1.0 mm (Max) This ultra-low profile (1.0 mm) makes it ideal for thin electronic devices like smartphones and tablets. --- ### Electronic Characteristics & Features 1. **Magnetic Shielding:** The part features a ferrite core construction that contains the magnetic flux. This minimizes EMI, preventing the inductor from interfering with nearby sensitive components on the PCB. 2. **Saturation Current ($I_{sat}$):** This is the current level at which the inductance drops by a specified percentage (usually 30%). For the 2R2-R, it can handle peaks up to **1.26A** before the core begins to saturate. 3. **Low DCR:** With a maximum resistance of **0.088 $\Omega$**, it ensures minimal power loss through heat, which is critical for extending battery life in portable electronics. 4. **Construction:** It uses a "Drum Core" design which provides a balance between high current handling and small physical volume. --- ### Common Applications * **DC-DC Converters:** Used in "Buck" (step-down) or "Boost" (step-up) regulators. * **Mobile Devices:** Smartphones, tablets, and handheld gaming consoles. * **Wearables:** Smartwatches and fitness trackers due to the 1.0mm height. * **LED Drivers:** Providing stable current to backlight displays. ---