LM1117

The LM1117 is a low-dropout voltage regulator manufactured by onsemi, designed to provide stable and efficient power regulation in a wide range of applications. It offers fixed output voltages of 1.8V, 2.5V, 3.3V, and 5.0V, with a maximum output current capability of 800mA. The device features a dropout voltage as low as 1.2V at full load, making it ideal for systems requiring minimal input-to-output voltage differences, such as battery-powered devices or compact power supplies. This regulator includes built-in thermal shutdown and current limit protection, ensuring reliable operation under fault conditions. Its design minimizes the need for external components—typically just two capacitors (input and output) are required for stability—resulting in a simple and cost-effective solution for power management. The LM1117 also exhibits low quiescent current, typically around 8mA, which enhances efficiency in low-power applications. The LM1117 is available in TO-220 and SOT-223 packages, offering flexibility in PCB layout and thermal management. These packages support easy mounting and heat dissipation, critical for maintaining performance in high-density designs. The device operates over an input voltage range from 1.9V to 12V, providing compatibility with various power sources, including standard batteries and regulated DC inputs. Common applications include portable electronics, embedded systems, microcontroller power supplies, and industrial control modules. Due to its robust protection features and consistent output regulation, it is widely used in consumer electronics, automotive systems, and communication equipment where reliability and space efficiency are key considerations. The LM1117 is engineered for high performance in demanding environments, delivering stable voltage regulation even under varying load and temperature conditions. Its compatibility with standard PCB manufacturing processes ensures seamless integration into existing designs. With a proven track record in the industry, this regulator remains a popular choice for engineers seeking a dependable, low-cost solution for linear power regulation.