TLE4276-2DV: A 5-V Low-Drop Voltage Regulator from Infineon for Automotive Applications

In the demanding world of automotive electronics, ensuring stable and reliable power supply is paramount. The TLE4276-2DV from Infineon Technologies stands out as a quintessential component designed to meet these rigorous requirements. This integrated circuit is a 5-V low-dropout (LDO) linear voltage regulator engineered specifically for the harsh environmental and electrical conditions found in automotive applications.

The primary role of the TLE4276-2DV is to provide a clean, stable, and precisely regulated 5-volt supply from a higher vehicle battery voltage, which can typically range from approximately 6 V to 42 V. Its low dropout voltage is a critical feature, enabling it to continue regulating the output voltage even when the input voltage dips to a level very close to the output value. This capability is essential during critical automotive events such as cold-cranking, when the battery voltage can temporarily plummet.

Beyond basic regulation, the TLE4276-2DV is packed with protective features that make it exceptionally robust. It includes overload protection, short-circuit protection, and overtemperature protection, safeguarding both the regulator itself and the sensitive microcontroller or logic circuit it powers. Furthermore, it incorporates a reset circuit with a programmable delay. This reset output monitors the regulated voltage and provides a defined reset signal to the microprocessor if the supply voltage drops below a certain threshold, ensuring controlled system shutdown and restart.

Another significant advantage is its very low quiescent current in both operational and standby modes, which is a crucial factor for modern vehicles with numerous always-on electronic control units (ECUs) to minimize battery drain. Its design also boasts excellent electromagnetic compatibility (EMC), preventing it from interfering with other critical vehicle systems.

Housed in a robust PG-TO263-5 package, the TLE4276-2DV is built to withstand the extreme temperature fluctuations and mechanical vibrations inherent to the automotive environment. It is inherently qualified for use in applications under the hood, in instrument clusters, and in body control modules.

ICGOOFind: The Infineon TLE4276-2DV is a robust and highly reliable 5V LDO voltage regulator, purpose-built for the automotive industry. Its combination of low dropout voltage, comprehensive protection mechanisms, and a diagnostic reset output makes it an ideal, single-chip solution for powering microcontrollers in the most demanding vehicular environments, ensuring system stability and longevity.

Keywords: Low-Dropout (LDO) Regulator, Automotive Grade, Overload Protection, Reset Circuit, Thermal Shutdown.