Infineon TLE4299G 5-V Low-Drop Voltage Regulator: Datasheet and Application Overview

The Infineon TLE4299G is a monolithic integrated low-drop voltage regulator designed to deliver a fixed 5-V output with a maximum output current of 250 mA. Engineered for robust performance in the demanding environment of automotive electronics, this IC is equally suited for a wide range of other industrial and consumer applications where stable, reliable voltage regulation is critical.

A key feature of the TLE4299G is its exceptionally low dropout voltage, typically 200 mV at a full load of 250 mA. This high efficiency allows the device to continue regulating the output voltage effectively even when the input voltage dips very close to the 5-V output level, minimizing power dissipation and extending battery life in automotive systems. The regulator is protected against overload conditions and short circuits to the output, as well as against overtemperature and reverse polarity. An integrated reset circuit with a programmable delay time provides a crucial function for microcontrollers, issuing a reset signal during power-on, power-off, and undervoltage conditions to ensure a safe and controlled system state.

The device boasts a very low standby current consumption, typically just 18 µA, making it an excellent choice for applications that are permanently connected to a battery and require minimal power drain in "ignition-off" scenarios. Furthermore, its wide input voltage range, from 5.5 V up to 42 V, and its ability to handle load dump transients (up to 45 V) make it exceptionally resilient to the voltage spikes commonplace in the automotive electrical system.

Typical applications for the TLE4299G are extensive. Its primary use is in body and convenience control modules, such as window lift, sunroof, and seat control units. It is also ideal for powering sensors, USB ports, and infotainment systems where a clean, stable 5-V supply is mandatory. The combination of its reset functionality and robust protection features makes it a perfect companion for powering microcontrollers (MCUs) and other logic circuits.

ICGOO FIND: The Infineon TLE4299G stands out as an exceptionally robust and feature-rich LDO regulator tailored for the automotive industry. Its combination of low dropout voltage, comprehensive protection mechanisms, and integrated reset generation provides a compact, reliable, and single-chip solution for powering 5-V subsystems, significantly enhancing system safety and reliability while simplifying design.

Keywords: Low-Dropout (LDO) Regulator, Automotive Electronics, Overload Protection, Reset Circuit, Low Quiescent Current