TLE4279G: Infineon's 5-V Low-Drop Voltage Regulator for Automotive and Industrial Applications

In the demanding worlds of automotive and industrial electronics, stable and reliable power supply is non-negotiable. Infineon's TLE4279G stands out as a robust 5-V low-dropout (LDO) voltage regulator engineered specifically to meet the stringent requirements of these applications. This monolithic integrated circuit provides a fixed 5-V output voltage with a maximum output current of 450 mA, making it an ideal power source for microcontrollers, sensors, and other critical logic components.

A key feature of the TLE4279G is its very low dropout voltage, typically 200 mV at 150 mA load. This efficiency is crucial in automotive environments, where the battery voltage can sag during cranking (start-stop conditions), yet the regulated power rail must remain stable to prevent system resets. The device is designed to handle a wide input voltage range from 5.5 V up to 42 V, offering exceptional resilience against load dumps and voltage transients common in 12-V and 24-V vehicle power systems.

Beyond its core regulation function, the TLE4279G is packed with integrated protection features that enhance system durability. These include overcurrent protection, overtemperature shutdown, and reverse polarity protection. Furthermore, it boasts a sophisticated overvoltage protection mechanism (e.g., active clamp) that safeguards downstream components by limiting the output voltage if an internal failure occurs. An enable input pin allows for external control of the regulator, facilitating power management strategies to reduce quiescent current in standby modes.

The device also demonstrates excellent electromagnetic compatibility (EMC) performance, a critical factor for both automotive and industrial use cases. Its high ripple rejection helps maintain a clean output even with a noisy input supply. Available in a PG-DSO-14 package with exposed pad for superior thermal performance, the TLE4279G is a complete and resilient power management solution.

ICGOODFIND: The Infineon TLE4279G is a highly robust and feature-complete 5-V LDO regulator. Its combination of low dropout voltage, wide input voltage range, and comprehensive integrated protection makes it a superior and reliable choice for powering electronic control units (ECUs) and industrial systems under harsh operating conditions.

Keywords: Low-Dropout (LDO) Regulator, Automotive Grade, Overvoltage Protection, Wide Input Voltage Range, Reverse Polarity Protection.