The **XFHCL22MB-R47M** is a high-performance, surface-mount (SMD) power inductor commonly used in DC-DC converter applications. It is designed for high-frequency circuits where efficiency and compact size are critical. ### 1. Part Number Breakdown The nomenclature typically follows this structure: | Segment | Meaning | Description | | :--- | :--- | :--- | | **XFHCL** | Series | High-current, low-profile power inductor series. | | **22** | Size Code | Represents the physical dimensions (approx. 2.5mm x 2.0mm). | | **MB** | Material/Type | Specific core material and construction style. | | **R47** | Inductance Value | **0.47 µH** (R denotes the decimal point). | | **M** | Tolerance | **±20%** tolerance. | --- ### 2. Key Technical Specifications Below are the typical electrical characteristics for this specific component: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~18-25 mΩ (typical) | | **Saturation Current (Isat)** | ~4.5A - 5.5A (depending on temp rise) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 2520 (Metric) / 1008 (Imperial) | --- ### 3. Core Features & Construction * **Molded Construction:** These inductors usually feature a metal powder core molded around the coil. This "shielded" construction minimizes EMI (Electromagnetic Interference). * **Soft Saturation:** Unlike ferrite cores that lose inductance sharply, the metal alloy core provides a "soft" saturation curve, maintaining stability during high current spikes. * **Low DCR:** Designed with thick copper wire to minimize power loss and heat generation. ### 4. Common Applications This part is typically found in: * **Mobile Devices:** Smartphones, tablets, and wearables where board space is limited. * **Voltage Regulator Modules (VRM):** Powering CPUs and GPUs. * **DC-DC Converters:** Point-of-load (POL) converters for converting battery voltage to lower logic levels (e.g., 3.3V, 1.8V, 1.2V). --- ### 5. Implementation Example In a typical buck converter circuit, the inductor is placed between the switching node and the output capacitor: ```c [Switching Regulator IC] | |----[XFHCL22MB-R47M Inductor]----[ V_Out ] | [Capacitor] | [ GND ] ```