The **XFHCL2009-R90M** is a high-current, shielded surface-mount (SMD) power inductor. This component is typically utilized in DC-DC converter applications where high efficiency and low electromagnetic interference (EMI) are required. --- ### 1. Technical Specifications The part number follows a standard nomenclature for electronic passives. Below are the primary technical characteristics: | Parameter | Specification (Typical) | | :--- | :--- | | **Inductance** | 0.90 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Package Size** | 2009 Series (approx. 2.0mm x 0.9mm) | | **Construction** | Shielded Magnetic Structure | | **Application** | Power Management, DC-DC buck/boost | --- ### 2. Key Features and Construction * **Magnetic Shielding:** The "HCL" series usually denotes a high-current, low-profile design with integrated shielding. This minimizes "leakage flux," preventing the inductor from interfering with nearby sensitive components on the PCB. * **Low DCR (DC Resistance):** Designed with flat-wire or high-conductivity copper to minimize power loss due to heat (I²R losses). * **High Saturation Current:** The core material is engineered to handle high current spikes without the inductance dropping significantly (saturation). * **SMT Design:** Optimized for automated "pick and place" assembly processes with robust solder pads. --- ### 3. Application Use Cases This specific inductor is commonly found in compact electronic devices where board space is at a premium: 1. **Mobile Devices:** Power rails for CPUs and GPUs in smartphones or tablets. 2. **Point of Load (POL) Converters:** Converting a higher voltage (e.g., 5V or 12V) down to a lower logic level (e.g., 1.2V). 3. **Wearables:** Due to the small "2009" footprint and low profile. 4. **SSD/Storage:** Power management for high-speed flash controllers. --- ### 4. Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **XF** | Manufacturer prefix (often XFMRS or similar) | | **HCL** | Series code (High Current/Low Profile/Shielded) | | **2009** | Physical dimensions (L x W) | | **R90** | Inductance value (R = decimal point; 0.90 µH) | | **M** | Tolerance (M = ±20%) |