The **PIC10040-R68M** is a high-current, shielded power inductor typically used in DC-DC converter applications. It belongs to a category of surface-mount devices (SMD) designed for high-density power electronics. --- ### 1. Technical Specifications The part number follows a standard naming convention for molded power inductors. Below are the primary electrical and physical characteristics: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.68 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Case Size** | 10040 (Approx. 11.5 x 10.3 x 4.0 mm) | | **DC Resistance (DCR)** | Very Low (typically < 3.0 mΩ) | | **Saturation Current ($I_{sat}$)** | High (typically 25A - 35A range) | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetically Shielded (Molded Construction) | --- ### 2. Key Features * **Molded Construction:** The coil is encapsulated in a metal powder composite. This provides excellent magnetic shielding, reducing Electromagnetic Interference (EMI) and audible noise (buzzing). * **High Saturation:** Unlike ferrite core inductors, these molded types have a "soft" saturation characteristic, meaning they don't lose inductance abruptly when current spikes occur. * **Low Profile:** The "40" in the name indicates a maximum height of approximately 4.0mm, making it suitable for compact circuit boards. * **High Efficiency:** The low DCR minimizes power loss due to heat, which is critical for high-efficiency power supplies. --- ### 3. Application Use Cases This specific inductor (0.68µH) is usually found in the output stage of switching regulators: 1. **Point of Load (POL) Converters:** Used in motherboards and GPU power phases to step down voltage for CPUs. 2. **DC-DC Modules:** High-frequency buck converters where fast transient response is required. 3. **Battery Powered Devices:** Where high efficiency and small footprint are prioritized. 4. **Automotive Electronics:** Infotainment systems and ADAS modules (if AEC-Q200 qualified). --- ### 4. Part Number Breakdown The nomenclature is generally decoded as follows: * **PIC:** Series prefix (Power Inductor Composite). * **10040:** Dimensions (10mm x 10mm footprint, 4.0mm height). * **R68:** Inductance value ($0.68$ microhenries). * **M:** Tolerance ($\pm 20\%$).