Infineon TLS810D1EJV50: A 5V 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 stringent safety requirements, power management becomes a critical design challenge. Addressing this need, the Infineon TLS810D1EJV50 emerges as a high-performance, 5V low-dropout (LDO) linear voltage regulator specifically engineered for the automotive environment.

The primary role of the TLS810D1EJV50 is to provide a clean, stable, and precisely regulated 5V supply from a higher vehicle battery voltage, which can typically range from 3V to 40V and is prone to significant noise and transients. Its low-dropout voltage is a key advantage, meaning it can continue to regulate the output voltage even when the input voltage is only slightly above 5V. This is particularly crucial during cold-crank scenarios, when the car battery voltage can momentarily dip to very low levels, ensuring that critical microcontrollers, sensors, and infotainment systems remain operational without interruption.

Beyond basic regulation, this LDO is packed with robust protection features essential for automotive integrity. It incorporates over-current protection (OCP) and thermal shutdown (TSD) to safeguard both the regulator itself and the downstream circuitry from damage in fault conditions. Furthermore, its high immunity to load dump transients—a severe voltage spike that can occur when disconnecting a battery while the alternator is charging—ensures unparalleled reliability.

Another standout feature is its extremely low quiescent current in standby mode. As modern vehicles incorporate more and more always-on features for comfort, security, and connectivity, minimizing power consumption when the engine is off is paramount to preventing battery drain. The TLS810D1EJV50 excels in this area, making it an ideal choice for applications that require continuous power, such as telematics control units (TCUs) and keyless entry systems.

Housed in a compact, surface-mountable PG-TO252-5-11 package, the regulator offers excellent thermal performance, which is vital for dissipating heat under high load currents in the high-ambient-temperature environment of a car's engine control unit (ECU). Its AEC-Q100 qualification guarantees that it meets the rigorous quality and reliability standards demanded by the automotive industry.

ICGOODFIND: The Infineon TLS810D1EJV50 stands out as a superior solution for automotive power management, offering a robust combination of wide input voltage range, critical protection mechanisms, and high efficiency with low quiescent current, all tailored to meet the strict ASIL (Automotive Safety Integrity Level) requirements for safer and more reliable vehicle systems.

Keywords: Automotive LDO Regulator, Low-Dropout Voltage, Load Dump Protection, Low Quiescent Current, AEC-Q100 Qualified.