TL431BC

Product Folder Order Now Technical Documents Tools & Software Support & Community TL431, TL432 SLVS543P – AUGUST 2004 – REVISED NOVEMBER 2018 TL431 / TL432 Precision Programmable Reference 1 Features 1 Reference Voltage Tolerance at 25°C – 0.5% (B Grade) – 1% (A Grade) – 2% (Standard Grade) Adjustable Output Voltage: Vref to 36 V Operation From −40°C to 125°C Typical Temperature Drift (TL43xB) – 6 mV (C Temp) – 14 mV (I Temp, Q Temp) Low Output Noise 0.2-Ω Typical Output Impedance Sink-Current Capability: 1 mA to 100 mA 2 Applications Adjustable Voltage and Current Referencing Secondary Side Regulation in Flyback SMPSs Zener Replacement Voltage Monitoring Comparator with Integrated Reference Simplified Schematic Input VKA IKA Vref 3 Description The TL431LI / TL432LI are pin-to-pin alternatives to TL431 / TL432. TL43xLI offers better stability, lower temperature drift (VI(dev)), and lower reference current (Iref) for improved system accuracy. The TL431 and TL432 devices are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.2 Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, s...