Infineon TLE42764: A 5-V Low-Drop Voltage Regulator for Automotive and Industrial Applications

In the demanding environments of modern automotive electronics and robust industrial control systems, stable and reliable power supply is non-negotiable. The Infineon TLE42764 addresses this critical need as a monolithic integrated low-dropout (LDO) voltage regulator, delivering a fixed 5-V output with exceptional accuracy and resilience.

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 frequently subjected to load-dump and voltage transients common in 12-V and 24-V vehicle power systems. Its low dropout voltage—typically 350 mV at a 400 mA load—ensures efficient operation even when the input voltage dips close to the output level, which is crucial for cold-crank conditions in automobiles.

A key feature of the TLE42764 is its very low current consumption in quiescent mode, which is vital for reducing power loss and improving energy efficiency, especially in always-on systems. The device incorporates comprehensive protection mechanisms, including overtemperature shutdown, short-circuit protection, and reverse polarity protection, safeguarding both the IC and the downstream circuitry from damage.

Furthermore, the enable (EN) input allows for external on/off control, facilitating power management strategies to shut down the regulator during standby modes. Its high stability with low-ESR ceramic output capacitors reduces the bill of materials and saves valuable board space.

ICGOOODFIND: The Infineon TLE42764 stands out as a robust and highly reliable power management solution. Its combination of a wide operating voltage range, comprehensive protection features, and low quiescent current makes it an exceptional choice for powering microcontrollers, sensors, and other critical logic components in harsh automotive and industrial environments.

Keywords: Low-Dropout (LDO) Regulator, Automotive Grade, Overvoltage Protection, Low Quiescent Current, Thermal Shutdown.