TLE4268G: Infineon's 5-V Low-Drop Fixed Voltage Regulator for Automotive and Industrial Applications

In the demanding worlds of automotive electronics and industrial control systems, power management is paramount. Components must deliver unwavering reliability under extreme conditions, including voltage fluctuations, wide temperature swings, and high levels of electrical noise. Addressing these critical needs, Infineon Technologies offers the TLE4268G, a robust 5-V low-dropout (LDO) fixed voltage regulator that has become a cornerstone for power supply designs in these harsh environments.

The TLE4268G is engineered to provide a stable and precise 5-V output voltage from an input supply voltage of up to 42 V. Its key defining characteristic is its low dropout voltage—typically 250 mV at a 150 mA load—which allows it to continue regulating the output voltage effectively even when the input voltage dips very close to the output level. This feature is crucial in automotive applications, such as during cold-crank scenarios where the battery voltage can temporarily plummet.

Beyond its basic regulating function, the TLE4268G is packed with integrated protection features that make it exceptionally durable. It is equipped with short-circuit and reverse polarity protection, safeguarding the IC and the downstream circuitry from damage caused by wiring mistakes or fault conditions. Furthermore, it includes over-temperature protection that shuts down the device if the junction temperature exceeds safe limits, ensuring operational safety. An integrated reset circuit with a programmable delay monitors the output voltage and provides a signal to the system’s microcontroller, enabling a safe and controlled power-up and power-down sequence.

The device’s AEC-Q100 qualification confirms its compliance with the stringent quality and reliability standards required for automotive components. This, combined with its ability to operate over a wide temperature range of -40 °C to 150 °C (junction temperature), makes it an ideal choice not only for automotive body control modules, sensor systems, and infotainment but also for rugged industrial applications like factory automation, PLCs, and robotics.

Available in a PG-TO263-5-11 (DPAK) package, the TLE4268G offers excellent thermal performance, efficiently dissipating heat to maintain stable operation under full load.

ICGOODFIND: The Infineon TLE4268G stands out as a highly reliable, fully protected 5V voltage regulator. Its combination of low dropout voltage, comprehensive protection features (including reverse polarity and over-temperature), and integrated reset functionality, all qualified for automotive use, makes it an superior and robust solution for powering ECUs and critical industrial systems where failure is not an option.

Keywords: Low-Dropout Regulator (LDO), Automotive Grade, Reverse Polarity Protection, Thermal Overload Protection, AEC-Q100