Infineon TLE4476D: A Comprehensive Technical Overview of the 5-V Low-Drop Voltage Regulator

The Infineon TLE4476D is a monolithic integrated low-drop voltage regulator designed for a wide range of automotive and industrial applications. Engineered to deliver a precise 5-V output voltage with a maximum output current of up to 450 mA, this IC is a robust solution for powering microcontrollers, sensors, and other critical electronic loads in harsh environments. Its architecture is optimized for very low dropout voltage, ensuring stable operation even when the input voltage dips close to the output level.

A key strength of the TLE4476D lies in its exceptional robustness and diagnostic features. It is equipped with comprehensive protection mechanisms including short-circuit protection, overtemperature shutdown, and reverse polarity protection. Furthermore, it offers diagnostic functions such as an error flag (ERR) that signals output voltage deviations and a reset output (RST) that provides a controlled reset signal for microprocessors during power-up and power-down sequences, enhancing system reliability.

The regulator is designed for an input voltage range from 5.5 V to 45 V, with transient survival capability up to 50 V, making it ideal for the demanding 12-V and 24-V automotive power systems. Its very low current consumption in quiescent mode makes it suitable for always-on applications. The device is available in a PG-TO263-5-11 (D²PAK) package, offering excellent thermal performance for dissipating heat under high load conditions.

ICGOODFIND Summary: The Infineon TLE4476D is a highly reliable, feature-rich LDO regulator that combines precise voltage regulation, comprehensive protection suite, and vital diagnostic outputs. Its automotive-grade qualification and robust design make it a premier choice for ensuring stable power supply in systems where reliability is non-negotiable.

Keywords: Low-Dropout Regulator, Automotive Grade, Overcurrent Protection, Voltage Supervision, Thermal Shutdown