LM2940T-5.0/NOPB – TEXAS INSTRUMENTS

The LM2940T-5.0/NOPB is a Texas Instruments precision 5.0V shunt regulator in a TO-220AB package (NOPB denotes no lead, bare package). It’s specifically designed for applications requiring a highly stable and accurate 5.0V output, even under varying input voltage and load current conditions. The device boasts a low output noise voltage of typically 50µVrms and a very tight output voltage tolerance of ±1%. It operates with an input voltage range of 7V to 40V, making it suitable for a wide array of power supply designs. The internal current limiting and thermal shutdown features provide robust protection against overcurrent and overheating conditions, enhancing system reliability._x000D_
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Unlike simpler shunt regulators, the LM2940T-5.0/NOPB offers a high degree of precision and stability, making it ideal for applications where precise voltage regulation is critical. This includes powering sensitive analog circuits, providing a stable reference voltage for other components, or as a precision voltage source in test and measurement equipment. Its high power dissipation capability (up to 15W) allows it to handle significant load currents, although heat sinking may be necessary at higher power levels. The TO-220AB package facilitates easy integration into PCB designs, and its fixed 5.0V output simplifies design complexity, reducing component count and design time. The absence of lead (NOPB) is beneficial for automated assembly processes.