TLE4274V50: Infineon's 5V Low-Drop Voltage Regulator for Robust Automotive and Industrial Applications

In the demanding environments of modern automotive electronics and industrial control systems, power supply integrity is non-negotiable. Voltage regulators must deliver unwavering performance amidst electrical noise, wide temperature swings, and sudden load changes. Addressing these challenges head-on, Infineon Technologies' TLE4274V50 stands out as a premier 5V low-dropout (LDO) voltage regulator engineered for maximum reliability and robustness.

This monolithic integrated voltage regulator is designed to provide a fixed 5V output with a maximum current of 450 mA. A key feature enabling its operation in stressful conditions is its remarkably low dropout voltage—typically only 200 mV at full load. This means it can continue to regulate a stable 5V output even when the input voltage dips very close to the output level, a critical capability during cold-crank scenarios in automobiles or brownout conditions in industrial settings.

The TLE4274V50 is exceptionally resilient, a necessity for its target applications. It incorporates comprehensive built-in protection mechanisms. These include overcurrent protection (OCL) that safeguards the IC and the load during short-circuit events, overtemperature shutdown (TSD) that prevents thermal runaway, and reverse polarity protection, ensuring survival against accidental battery misconnection. Furthermore, its ability to handle input voltages up to 45V and load dump pulses as per ISO 7637-2 makes it an ideal choice for the harsh 12V and 24V automotive power nets.

Beyond protection, the device emphasizes stability and precision. It requires only a small ceramic output capacitor (≥ 2.2 µF) for stable operation, reducing both board space and bill-of-material costs. Features like an enable pin (/EN) for remote switching and a reset output with an adjustable delay time (/RESET) provide valuable supervisory functions, allowing it to monitor the output voltage and signal a microcontroller in case of undervoltage events, thereby ensuring safe system operation and controlled startup sequences.

From powering sensors and body control modules to serving as a reliable supply for microcontrollers in factory automation equipment, the TLE4274V50 offers a compelling blend of performance, integration, and durability.

ICGOOODFIND: The Infineon TLE4274V50 is a robust, fully-protected 5V LDO regulator that sets a high standard for reliability. Its low dropout voltage, high input voltage tolerance, and integrated protection features like overcurrent and overtemperature shutdown make it an indispensable component for ensuring power supply stability in the most demanding automotive and industrial applications.

Keywords: Low-Dropout (LDO) Regulator, Automotive Grade, Overcurrent Protection (OCL), Thermal Shutdown, Reset Output (/RESET)