Infineon TLE4275G: A 5-V Low-Drop Voltage Regulator for Automotive and Industrial Applications

In the demanding environments of modern automotive electronics and industrial control systems, stable and reliable voltage regulation is a fundamental requirement. The Infineon TLE4275G is a monolithic integrated low-drop voltage regulator specifically engineered to meet this challenge, delivering a fixed 5-V output with exceptional performance and robustness.

This regulator is capable of supplying a maximum output current of 450 mA with a very low dropout voltage—typically only 200 mV at full load. This high efficiency is crucial for battery-powered applications, minimizing power loss and extending operational life. A key feature of the TLE4275G is its extremely low quiescent current in standby mode, which makes it an ideal choice for applications requiring always-on functionality, such as automotive control units that must respond to wake-up events while the engine is off.

The device is designed with a strong focus on robust protection and diagnostic capabilities. It includes comprehensive internal protection against overcurrent, overtemperature, and reverse polarity. Furthermore, it features a reset output with a programmable delay, which provides a defined signal to the connected microcontroller, ensuring a safe and controlled system start-up and shutdown. This is vital for maintaining data integrity and preventing erratic behavior in safety-critical systems.

Housed in a PG-TO263-5 package, the TLE4275G offers excellent thermal performance, allowing it to operate reliably over a wide ambient temperature range of -40 °C to 150 °C. Its high immunity to electrical transients, such as those described in ISO 7637-3, ensures unwavering performance in the electrically noisy environments typical of automotive applications.

ICGOOODFIND: The Infineon TLE4275G stands out as a premier solution for 5-V power supply designs, masterfully combining high current capability, ultra-low quiescent current, and extensive protection features. Its automotive-grade qualification and resilience make it an indispensable component for developers building next-generation reliable and efficient systems.

Keywords: Low-Dropout Regulator, Automotive Grade, Quiescent Current, Reset Output, Overcurrent Protection.