The **MPI4040R3-1R5-R** is a high-performance, power inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the MPI4040 series, which is characterized by its molded construction and high current-handling capabilities in a compact footprint. --- ### ## Technical Specifications The following table outlines the key electrical and physical parameters of the component: | Parameter | Value | | :--- | :--- | | **Inductance** | 1.5 µH | | **Tolerance** | ±20% | | **Rated Current (Idc)** | 6.5 A (Typical) | | **Saturation Current (Isat)** | 8.8 A (Typical) | | **DC Resistance (DCR)** | 16.5 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4.0mm x 4.0mm x 2.0mm | --- ### ### Key Features 1. **Molded Construction:** * The inductor is made using a metal flakes powder core. This design provides excellent magnetic shielding, reducing Electromagnetic Interference (EMI) with surrounding components. 2. **High Power Density:** * Despite its small 4040 (4.0mm x 4.0mm) footprint, it can handle significant current, making it ideal for modern, miniaturized electronics. 3. **Soft Saturation:** * Unlike ferrite inductors that drop inductance sharply when current limits are exceeded, this part exhibits "soft saturation," maintaining better performance during current spikes. 4. **Halogen Free & RoHS Compliant:** * Meets modern environmental and safety standards for electronic manufacturing. --- ### ### Common Applications The MPI4040R3-1R5-R is primarily used in **DC-DC Converter** circuits. Specific applications include: * **Computing:** Laptops, tablets, and server power modules. * **Portable Electronics:** Smartphones and handheld GPS units. * **Voltage Regulator Modules (VRM):** Providing stable power to CPUs and GPUs. * **Battery Powered Systems:** Where high efficiency and low DCR are critical for battery life. --- ### ### Code Example: Calculating Voltage Drop In a circuit, the voltage drop across the inductor's internal resistance (DCR) can be calculated using Ohm's Law: ```python # Constants for MPI4040R3-1R5-R max_dcr_ohms = 0.0165 # 16.5 mOhms operating_current_amps = 5.0 # Calculate Voltage Drop (V = I * R) voltage_drop = operating_current_amps * max_dcr_ohms print(f"Voltage drop at {operating_current_amps}A: {voltage_drop:.4f} V") ```