The **TMPIT03020F-R47** is a high-performance, surface-mount (SMD) power inductor. It is part of a category of components designed for high-current power management in compact electronic devices. --- ### 1. Key Technical Specifications The part number itself follows a standard naming convention that reveals its primary characteristics: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.47 µH (Microhenries) | | **Tolerance** | ±20% (indicated by "M" in some series, or defined by the "F" suffix) | | **Case Size** | Approx. 3.2mm x 2.5mm (0302 footprint) | | **Height** | Approx. 2.0mm | | **Material** | Metal Alloy (Shielded) | | **DC Resistance (DCR)** | Typically very low (mΩ range) to minimize power loss | --- ### 2. Functional Characteristics #### A. Shielded Construction This inductor uses a **molded metal powder** construction. Unlike traditional wire-wound inductors, the metal powder surrounds the coil, providing magnetic shielding. This reduces Electromagnetic Interference (EMI) and prevents the inductor from interfering with nearby sensitive circuits. #### B. High Saturation Current Because of the metal alloy core, this part features "soft saturation." This means that as current increases, the inductance drops gradually rather than crashing abruptly. This is critical for maintaining stability in power converters. #### C. Low Profile The "03020F" designation indicates a small physical footprint, making it ideal for: * Smartphones and Tablets * Wearable electronics * SSD (Solid State Drives) * DC-DC Converters --- ### 3. Application Use Cases The **TMPIT03020F-R47** is primarily used in **Voltage Regulator Modules (VRMs)** and **Point of Load (POL)** converters. * **Buck Converters:** Used to step down voltage (e.g., 5V to 1.2V) for CPU or memory power. * **Filtering:** Acts as a low-pass filter to smooth out ripples in high-frequency switching power supplies. * **Battery Management:** Efficiently handles power distribution in battery-operated devices due to low DC resistance. --- ### 4. Circuit Diagram Representation In a schematic, it is represented as a standard inductor with two terminals. ```mermaid graph LR Vin((Input)) --- L1[Inductor 0.47uH] --- Vout((Output)) L1 --- C1[Capacitor] --- GND ```