The TL431AFDT from Nexperia is a three-terminal adjustable shunt regulator family member featuring an output voltage range programmable from Vref (2.495 V) to 36 V using two external resistors. This device offers three reference voltage tolerance grades, with the A-grade (TL431A) providing 1% precision. Key characteristics include a typical temperature drift of 9 mV over the 0°C to 70°C range, low output noise, and a typical output impedance of 0.2 Ω. The sink current capability spans from 1 mA to 100 mA. The TL431AFDT is AEC-Q100 qualified (Grade 1), making it suitable for automotive and other high-reliability applications. Typical uses include shunt regulators, precision current limiters, precision constant current sinks, and isolated feedback loops for switch mode power supplies (SMPS).