Infineon TLE4269G: A 5-V Low-Drop Voltage Regulator for Automotive Applications

The increasing complexity of automotive electronic systems demands highly reliable and robust power management solutions. The Infineon TLE4269G stands out as a monolithic integrated fixed-voltage regulator, specifically engineered to meet the stringent requirements of the automotive environment. This 5-V regulator delivers a maximum output current of 450 mA with an impressively low dropout voltage, making it an ideal power source for microcontrollers, sensors, and other critical logic circuits within a vehicle.

A key feature of the TLE4269G is its extremely low current consumption in standby mode. This is crucial for modern automobiles, where various control units must remain in a low-power state to prevent battery drain when the engine is off, yet be instantly ready for operation. The device is designed with a focus on exceptional reliability and durability, incorporating comprehensive protection mechanisms. These include internal current limiting to safeguard against short-circuit conditions, overtemperature protection that shuts down the device if the junction temperature exceeds safe limits, and reverse polarity protection on the input side, a common fault scenario during maintenance or jump-starting.

Furthermore, the regulator boasts a very low dropout voltage, typically 200 mV at 150 mA load. This low-drop (LDO) characteristic ensures a stable 5-V output even when the input voltage dips close to the output level, such as during cold-crank conditions when the vehicle's battery voltage can momentarily drop to very low levels. Its high immunity to load jumps and input voltage fluctuations guarantees stable operation for connected components. The TLE4269G is also characterized by its low electromagnetic emissions, contributing to a cleaner electromagnetic environment and reducing interference with sensitive radio and communication systems in the car.

Housed in a robust PG-TO263-5-11 (DPAK) package, the TLE4269G is built to withstand the harsh under-the-hood conditions, including wide temperature ranges, humidity, and vibration. Its combination of performance, integration, and protective features makes it a cornerstone component for building resilient automotive power supply networks.

ICGOODFIND: The Infineon TLE4269G is a superior choice for automotive designers seeking a robust, feature-rich 5V LDO regulator. Its ultra-low quiescent current, comprehensive built-in protection features (current limit, overtemperature, reverse polarity), and ability to operate reliably in the harsh automotive environment provide a critical and dependable power solution for a vast array of in-vehicle electronic applications.

Keywords: Low-Dropout Regulator (LDO), Automotive Grade, Low Quiescent Current, Overtemperature Protection, Reverse Polarity Protection.