The **LMI252012A-R24M** is a surface-mount multilayer chip inductor, typically used for power management and high-frequency filtering. Its nomenclature follows specific industry standards for dimensions and electrical characteristics. --- ### 1. Part Number Breakdown Understanding the alphanumeric code explains the physical and electrical limits of the component: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **LMI** | Series Code | Multilayer Chip Inductor (Low Profile/Power) | | **252012** | Dimensions | 2.5mm (L) x 2.0mm (W) x 1.2mm (H) | | **A** | Material/Design | Specific internal material or design revision | | **R24** | Inductance Value | 0.24 $\mu$H (R represents the decimal point) | | **M** | Tolerance | ±20% | --- ### 2. Key Electrical Specifications While specific values can vary slightly by manufacturer (e.g., Chilisin or Taiyo Yuden equivalents), these are the typical parameters for this part: * **Inductance:** 0.24 $\mu$H * **Tolerance:** ±20% * **DC Resistance (DCR):** Low (typically < 0.1 $\Omega$) to minimize power loss. * **Rated Current:** Usually ranges between 1.5A to 3.0A (Saturation/Temperature rise current). * **Operating Temperature:** Typically -40°C to +125°C. --- ### 3. Construction and Material The "Multilayer" designation means this part is not a traditional wire-wound coil. * **Internal Structure:** It consists of screen-printed conductive layers (usually silver) stacked between layers of ceramic or ferrite material. * **Magnetic Shielding:** Because it is a multilayer monolithic structure, it is inherently self-shielded, reducing Electromagnetic Interference (EMI) with neighboring components. --- ### 4. Typical Applications This component is designed for high-density PCB layouts where space is limited but power efficiency is required: * **DC-DC Converters:** Used in the "Buck" or "Boost" stages of mobile devices. * **Smartphones/Tablets:** Power rails for CPUs or RF modules. * **Filtering:** Reducing noise in high-speed data lines or power supplies. --- ### 5. Land Pattern (Soldering) The "2520" size corresponds to the **1008** imperial size. Designers should use the following approximate pad layout: ```text 2.5mm (L) <--------------> +-----+ +-----+ ^ | PAD | | PAD | | 2.0mm (W) +-----+ +-----+ v <---> <---> 0.8mm 0.8mm (typical) ```