LM1117-Q1

The LM1117-Q1 is a low-dropout voltage regulator designed for automotive and industrial applications, manufactured by Texas Instruments. It provides a stable output voltage with a maximum dropout voltage of 1.2 V at 800 mA load current, ensuring efficient operation even under varying input conditions. The device supports input voltages from 3.3 V to 15 V, making it suitable for a wide range of power supply scenarios. Its fixed output voltages include 3.3 V and 5 V options, offering flexibility in system design. This regulator features built-in thermal shutdown and current limit protection, enhancing reliability in harsh environments typical of automotive systems. It also includes an enable pin for power management, allowing external control of the regulator’s operation to reduce power consumption during idle modes. With a quiescent current of approximately 8 mA, the LM1117-Q1 delivers energy-efficient performance without compromising on stability or accuracy. Designed to meet AEC-Q100 Grade 1 qualification standards, the LM1117-Q1 is optimized for use in automotive electronics such as infotainment systems, sensors, and control modules. Its robustness against temperature variations—from -40°C to +125°C—ensures consistent performance across extreme operating conditions. The compact TO-220 package facilitates easy integration into printed circuit boards while maintaining thermal efficiency. The LM1117-Q1 offers excellent line and load regulation, minimizing output voltage ripple and maintaining precision under dynamic load changes. This makes it ideal for powering sensitive analog circuits and microcontrollers where clean and stable power is essential. Additionally, its internal reference and feedback loop ensure accurate voltage regulation within ±2% tolerance over temperature and load ranges. Engineers appreciate its simplicity: only a few external components—typically a single input capacitor and one output capacitor—are required for stable operation. This reduces bill-of-materials cost and simplifies PCB layout. The device is fully compatible with standard surface-mount and through-hole assembly processes, supporting both high-volume production and prototyping needs. In summary, the LM1117-Q1 combines reliable performance, low power loss, and automotive-grade durability, making it a preferred choice for designers seeking a robust, cost-effective voltage regulation solution in demanding applications.