The TLE4471G is an automotive‑qualified triple low‑dropout (LDO) linear voltage regulator IC from Infineon Technologies. It’s designed to provide multiple regulated voltages and integrated system supervision functions — especially in automotive electronic systems like engine control units (ECUs). 

📌 Key Features

• Triple voltage regulator: One main regulator plus two tracked outputs. 

• Output currents:

  • Main output: up to ~450 mA

  • Two tracked outputs: ~50 mA and ~100 mA each 

• Regulated 5 V output (main) with good accuracy (±2 %). 

• Low dropout voltage: ~250–600 mV depending on load. 

• Wide input range: Typically ~5.5 V to ~40 V operation (automotive battery range). 

• Integrated supervisory features:

  • Watchdog for microcontroller supervision

  • Under‑voltage reset

  • Power‑on reset

  • Enable/inhibit control 

• Protection: Overtemperature, overvoltage and reverse‑polarity built in. 

• Automotive qualification: AEC‑Q100 grade and RoHS compliant. 

• Package: PG‑DSO‑20 (20‑pin surface mount).