Infineon TLE8366EV33XUMA1: A 3V Low-Dropout Voltage Regulator for Automotive Applications

In the demanding world of automotive electronics, where components must operate reliably under extreme temperatures, voltage fluctuations, and harsh electromagnetic conditions, power management becomes a critical design challenge. Addressing this need, Infineon Technologies has developed the TLE8366EV33XUMA1, a highly robust 3.3V low-dropout (LDO) voltage regulator engineered specifically for the automotive environment.

This monolithic integrated circuit is designed to provide a stable and clean 3.3V output voltage from a vehicle's battery supply, which can typically range from 3.5V to a punishing 40V. The device's low dropout voltage is a key feature, enabling it to continue regulating its output even when the input voltage dips very close to the output level. This is essential during critical automotive events like cold-cranking, when the battery voltage can plummet dramatically.

The TLE8366EV33XUMA1 excels in reliability and diagnostic capability. It integrates a comprehensive suite of protection features, including overload, short-circuit, and over-temperature protection, safeguarding both the regulator itself and the sensitive microcontroller or ASIC it powers. Furthermore, it offers vital diagnostic feedback through an error flag pin, which alerts the system's main processor to abnormal conditions such as an output voltage drop, enhancing the overall safety and functional security of the application.

Its primary use cases are vast within a modern vehicle, often serving as a local power supply for microcontrollers, sensors, and ASICs in systems like body control modules, instrument clusters, and advanced driver-assistance systems (ADAS). The device's excellent electromagnetic compatibility (EMC) performance and very low quiescent current make it an ideal choice for both always-on and ignition-switched power rails.

Housed in a space-saving PG-SOT223-4 package, the regulator is also AEC-Q100 qualified, guaranteeing its performance across the automotive temperature range of -40°C to 150°C junction temperature. This certification is a mandatory requirement for components used in automotive systems, underscoring its suitability for the most rigorous applications.

ICGOOFind: The Infineon TLE8366EV33XUMA1 stands out as a premier solution for automotive power management, merging high accuracy, exceptional robustness, and integrated diagnostic functions in a single package. It is a testament to Infineon's commitment to providing components that meet the stringent standards of the automotive industry, ensuring reliability and longevity in every application.

Keywords: Automotive LDO Regulator, 3.3V Output, AEC-Q100 Qualified, Low Dropout Voltage, Over-Temperature Protection.