Infineon TLE4275D: A 5-V Low-Drop Voltage Regulator for Automotive and Industrial Applications

In the demanding environments of modern automotive electronics and industrial control systems, stable and reliable power supply is non-negotiable. The Infineon TLE4275D addresses this critical need as a monolithic integrated low-drop voltage regulator, delivering a fixed 5-V output with exceptional accuracy and robustness.

This regulator is engineered to handle a wide input voltage range from 5.5 V up to 45 V, making it perfectly suited for applications that must endure load-dump and other voltage transients common in 12-V and 24-V automotive power systems. Its key performance metric, the low dropout voltage, is typically 300 mV at a full load current of 450 mA. This efficiency ensures stable operation even when the input voltage dips close to the output level, which is crucial during cold-crank scenarios in vehicles.

The TLE4275D is not just about delivering power; it is about providing protected and clean power. The IC incorporates a comprehensive suite of protection features, including overcurrent limitation, overtemperature shutdown, and reverse polarity protection. Furthermore, an integrated reset circuit with a programmable delay monitors the output voltage. This function is vital for microcontrollers and other digital systems, ensuring they only operate within a safe voltage window and are held in reset until the supply is fully stable.

Additional quality-of-life features enhance its usability. The very low quiescent current in standby mode makes it suitable for applications with always-on functions. The device also boasts excellent electromagnetic compatibility (EMC) performance, a critical requirement for the noisy electrical environments found in automotive applications.

Typical applications are extensive, spanning:

Automotive: Body control modules (BCMs), sensor supplies, instrument clusters, and infotainment systems.

Industrial: Programmable Logic Controllers (PLCs), sensors, actuators, and general-purpose board-level power regulation.

ICGOOODFIND

The Infineon TLE4275D stands out as a robust, feature-complete solution for 5-V power regulation. Its combination of a wide input voltage range, comprehensive protection mechanisms, and the critical integrated reset generator makes it an exceptionally reliable choice for designers tackling the harsh conditions of automotive and industrial markets.

Keywords: Low-Dropout Regulator, Automotive Grade, Overcurrent Protection, Reset Circuit, Voltage Transient