The **LPS5030-172ML** is a high-performance, shielded power inductor manufactured by **Coilcraft**. It belongs to the LPS5030 series, known for having a small footprint and high current handling capabilities relative to its size. ### 1. Key Technical Specifications The following table outlines the primary electrical characteristics of the LPS5030-172ML: | Parameter | Specification | Note | | :--- | :--- | :--- | | **Inductance** | 1.7 µH | Measured at 100 kHz, 0.1 Vrms | | **Tolerance** | ±20% | Indicated by the "M" in the part number | | **DCR (Max)** | 0.055 Ohms | Maximum Direct Current Resistance | | **SRF (Typ)** | 120 MHz | Self-Resonant Frequency | | **Isat** | 3.5 A | Saturation Current (30% drop in inductance) | | **Irms** | 2.5 A | RMS Current (40°C temperature rise) | | **Dimensions** | 4.9 x 4.9 x 2.9 mm | Length x Width x Height | --- ### 2. Breakdown of Part Numbering Understanding the suffix codes helps in identifying the specific variant: * **LPS**: Low Profile Shielded series. * **5030**: Physical size (approx. 5.0mm x 5.0mm base, 3.0mm height). * **172**: Inductance code. "17" followed by "2" zeros = 1700 nH or **1.7 µH**. * **M**: Tolerance code (±20%). * **L**: Termination/Packaging code (typically Lead-free, RoHS compliant, Matte Tin over Nickel over Silver-platinum-glass frit). --- ### 3. Core Features and Applications #### Features * **Magnetic Shielding:** The part is magnetically shielded to prevent Electromagnetic Interference (EMI) with surrounding components. * **Low Profile:** At only 2.9mm high, it is ideal for height-constrained PCB designs. * **High Efficiency:** Low DCR minimizes power loss through heat, making it suitable for battery-operated devices. #### Common Applications * **DC-DC Converters:** Used in buck, boost, and SEPIC topologies. * **Mobile Devices:** Power management in smartphones and tablets. * **LED Drivers:** Providing stable current for backlight or lighting applications. * **VRMs:** Voltage Regulator Modules for CPUs and GPUs. --- ### 4. Typical Performance Graph Concept When using this part, engineers primarily look at the **Inductance vs. Current** curve. As the current approaches **3.5A (Isat)**, the core begins to saturate, and the inductance will drop significantly. For stable operation, the peak circuit current should remain below the Isat rating.