STMicroelectronics L4941BV Fixed 5V LDO Voltage Regulator, 1A, TO-220

The STMicroelectronics L4941BV is a robust, 3-terminal positive voltage regulator designed for exceptional efficiency in demanding applications. It features a very low dropout voltage, making it perfectly suited for battery-powered equipment where maximising operational life is critical. By minimising power loss during regulation, it significantly reduces overall consumption and prolongs battery life, offering a reliable power management solution.

This device incorporates comprehensive internal protection mechanisms to ensure safe and stable operation. These include internal current limiting, an anti-saturation circuit, thermal shutdown, and safe area protection, safeguarding both the regulator and the connected circuitry from fault conditions. Additional features like reverse polarity protection enhance its durability in real-world installations.

Engineered for a broad input voltage range, the L4941BV delivers a fixed, regulated 5V output capable of supplying up to 1A of current. Its very low quiescent current further contributes to energy efficiency, making it an ideal choice for applications where power conservation is a priority. The through-hole TO-220 package ensures easy mounting and provides excellent thermal performance for effective heat dissipation.

With an operational temperature range extending from -40°C to 150°C, this regulator is built to perform reliably in harsh environments, from industrial controls to consumer electronics. Its combination of low dropout, high current capability, and integrated protections makes it a versatile and dependable component for any 5V power supply design requiring stability and efficiency.