Infineon TLE4470GS: A 5-V Low-Drop Voltage Regulator for Automotive and Industrial Applications

In the demanding environments of modern automotive and industrial systems, ensuring a stable and reliable power supply is paramount. The Infineon TLE4470GS stands out as a quintessential solution, a 5-V low-dropout (LDO) voltage regulator engineered to meet the rigorous requirements of these applications. This device exemplifies the integration of robust performance, diagnostic capabilities, and protective features in a single package.

The core function of the TLE4470GS is to provide a precisely regulated 5-V output voltage from an input voltage range spanning from 5.5 V to 42 V. Its low dropout voltage of typically 500 mV at a full load current of 150 mA is a critical characteristic, enabling it to continue regulating effectively even when the input voltage dips very close to the output level. This is especially vital in automotive scenarios, such as during cold-crank conditions when the battery voltage can plummet.

Beyond its primary regulation task, the TLE4470GS is equipped with a comprehensive suite of integrated protection and diagnostic features. These include overload protection, short-circuit protection, and overtemperature shutdown, which safeguard both the regulator itself and the downstream circuitry. A key diagnostic output is the error flag, which provides a warning signal for events like output voltage drops or overtemperature conditions, allowing microcontrollers to take appropriate action.

Designed for resilience, the IC boasts an extended operating temperature range from -40 °C to 150 °C for the junction temperature, ensuring dependable performance under the hood of a car or on a factory floor. Its high immunity to load dump transients (up to 45 V) and reverse polarity protection further solidify its reputation for robustness in electrically harsh environments. Available in a PG-TO263-5 package, it also offers excellent thermal performance for power dissipation.

ICGOOODFIND: The Infineon TLE4470GS is a robust and highly integrated LDO voltage regulator, purpose-built for the challenging conditions of automotive and industrial electronics. Its combination of low dropout voltage, a wide input range, extensive protective circuitry, and diagnostic capabilities makes it an exceptionally reliable choice for powering critical systems like ECUs, sensors, and controllers.

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