Infineon TLE42644G: 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 TLE42644G addresses this critical need as a monolithic integrated fixed-voltage regulator, designed to deliver a precise 5-V output with exceptional performance and robustness.

This regulator is engineered to handle a wide input voltage range from 5.5 V up to 42 V, making it perfectly suited for applications that must endure harsh electrical conditions, such as load dump pulses and voltage transients commonly found in 12-V and 24-V vehicle power systems. Its key feature is the very low dropout voltage of typically 200 mV at a 150 mA load. This high efficiency is crucial for ensuring stable operation even when the input voltage dips close to the output level, minimizing power loss and heat generation.

Beyond its core regulation function, the TLE42644G is equipped with a comprehensive suite of built-in protection mechanisms. These include current limiting and overtemperature shutdown to safeguard both the IC and the downstream circuitry. A critical feature for safety-critical applications is the error signal output, which alerts the system's microcontroller if the output voltage falls out of tolerance, enabling immediate corrective actions. Furthermore, the device boasts very low quiescent current, a vital attribute for supporting the always-on ECUs in vehicles without draining the battery.

Its high immunity to electromagnetic interference (EMI) ensures flawless operation in electrically noisy environments. Packaged in a PG-TO263-5-1 (DPAK) or PG-TO252-5-1, it offers excellent thermal performance for dissipating heat.

Typical applications are extensive, spanning across:

Body control modules (BCM) and instrument clusters

Engine control units (ECU) and sensor power supply

Industrial PLCs, actuators, and general-purpose microcontroller supplies

ICGOODFIND: The Infineon TLE42644G stands out as a robust and highly reliable solution for 5-V power regulation. Its combination of a wide input voltage range, low dropout, integrated protections, and diagnostic features makes it an exceptional choice for designers tackling the stringent requirements of automotive and industrial applications.

Keywords: Low-Dropout Regulator, Automotive Grade, Overcurrent Protection, 5V Output, Wide Input Voltage