L4931

The L4931 is a high-performance linear voltage regulator manufactured by STMicroelectronics, designed for efficient and stable power management in various electronic systems. It provides a fixed output voltage of 5V with a maximum output current of 1.5A, making it suitable for applications requiring reliable power delivery under variable load conditions. This regulator features built-in thermal shutdown and short-circuit protection, ensuring safe operation even under adverse conditions such as overheating or excessive current draw. Its low dropout voltage—typically around 1.2V at full load—enables efficient operation with minimal power loss, which is especially beneficial in battery-powered or space-constrained designs where energy efficiency and heat dissipation are critical concerns. The L4931 offers excellent line and load regulation, maintaining a stable output voltage despite fluctuations in input supply or load current. This stability makes it ideal for sensitive analog circuits, microcontroller units (MCUs), and communication modules that demand clean and consistent power sources. Additionally, the device includes an internal current limit circuit to prevent damage from overloads, enhancing system reliability. Designed for ease of use, the L4931 requires only a few external components—a single input capacitor and an optional output capacitor—to achieve optimal performance. It operates over a wide input voltage range from 7V to 35V, allowing compatibility with diverse power sources including automotive batteries, industrial power supplies, and unregulated DC systems. Common applications include automotive electronics, industrial control systems, consumer electronics, and embedded systems where robust, low-noise regulation is essential. Its compact TO-220 package supports easy mounting on printed circuit boards while providing adequate thermal dissipation for continuous operation. With its combination of high current capability, built-in protections, and operational flexibility, the L4931 serves as a dependable solution for engineers seeking stable and efficient voltage regulation in demanding environments.