Infineon TLE4699GM: A Low-Dropout Linear Voltage Regulator for Automotive Applications

The increasing complexity of automotive electronic systems demands highly reliable and robust power management solutions. The Infineon TLE4699GM is a monolithic integrated low-dropout (LDO) linear voltage regulator specifically engineered to meet the stringent requirements of the automotive environment. This device provides a stable and precise output voltage, making it an ideal choice for powering microcontrollers, sensors, and other critical loads where noise-sensitive analog or digital circuits are present.

A standout feature of the TLE4699GM is its extremely low dropout voltage, typically 180 mV at a full load current of 250 mA. This high efficiency is crucial in automotive applications, especially during cold-crank or start-stop scenarios where the battery voltage can dip significantly. The regulator can maintain a stable output even when the input voltage is only marginally higher than the output level, ensuring uninterrupted operation of electronic control units (ECUs).

Designed for resilience, the TLE4699GM incorporates comprehensive protection mechanisms. These include current limitation with foldback, overtemperature shutdown, and reverse polarity protection. Furthermore, its wide input voltage range of up to 45 V offers a strong defense against load-dump transients, a common voltage spike in automotive electrical systems. The device also features an enable input, allowing for external control of the output voltage to manage power consumption in the system.

Another critical attribute is its excellent electromagnetic compatibility (EMC) performance. The internal circuit design and structure are optimized to minimize noise emission and provide high immunity to external interference, which is paramount for the reliable functioning of adjacent sensitive components.

Housed in a PG-TO252-3 (DPAK) package, the TLE4699GM offers good thermal performance, efficiently dissipating heat into the PCB. Its AEC-Q100 qualification guarantees its reliability and performance under the harsh conditions of automotive operation, including wide temperature fluctuations and prolonged durability demands.

ICGOODFIND: The Infineon TLE4699GM stands out as a robust, high-performance LDO regulator tailored for the automotive industry. Its combination of low dropout voltage, wide input voltage range, integrated protections, and AEC-Q100 compliance makes it a superior and reliable choice for ensuring stable power delivery in even the most demanding vehicle environments.

Keywords: Low-Dropout (LDO) Regulator, Automotive Grade, AEC-Q100, Load-Dump Protection, Low Quiescent Current