### Overview of CSRML2R005DM The **CSRML2R005DM** is a high-precision, surface-mount **Current Sense Resistor**. It is specifically designed for applications requiring low resistance values to monitor current flow by measuring the voltage drop across the component. --- ### Technical Specifications Below are the primary electrical and physical characteristics of the device: | Parameter | Specification | | :--- | :--- | | **Resistance Value** | 0.005 $\Omega$ (5 m$\Omega$) | | **Tolerance** | ±0.5% (represented by the 'D' in the part number) | | **Package Size** | 2512 (Inch) / 6432 (Metric) | | **Power Rating** | 2 Watts (at 70°C) | | **Temperature Coefficient (TCR)** | ±50 ppm/°C | | **Technology** | Metal Foil / Metal Strip | | **Operating Temperature** | -55°C to +170°C | --- ### Part Number Breakdown Understanding the nomenclature helps in identifying the specific attributes of this series: 1. **CSRML**: Series name (Current Sense Resistor, Metal Strip/Low Ohmic). 2. **2R**: Indicates the power rating/size (2 Watts / 2512 package). 3. **005**: The resistance value (0.005 Ohms). 4. **D**: The tolerance code (±0.5%). 5. **M**: Packaging code (usually refers to Embossed Plastic Tape / Reel). --- ### Key Features and Applications #### Features * **Low Inductance:** The metal strip construction ensures minimal parasitic inductance, making it suitable for high-frequency switching. * **High Stability:** Excellent thermal stability due to the low TCR (Temperature Coefficient of Resistance). * **High Power Density:** Capable of handling 2 Watts in a relatively small 2512 footprint. #### Applications * **Power Management:** DC-DC converters and voltage regulator modules. * **Battery Monitoring:** Battery management systems (BMS) for laptops, e-bikes, and EVs. * **Motor Control:** Detecting over-current conditions in industrial motor drives. * **Consumer Electronics:** Current sensing in smartphones and tablets for charging circuits. --- ### Typical Circuit Implementation When using this part, it is typically placed in series with the load. The voltage ($V$) measured across the resistor is used to calculate the current ($I$) using Ohm's Law ($I = V / R$). ```c // Example Calculation: // If the measured voltage drop across CSRML2R005DM is 10mV: // R = 0.005 Ohms // I = 0.010V / 0.005 Ohms // I = 2 Amperes ```