TL432-Q1

Product Folder Order Now Technical Documents Tools & Software Support & Community TL431-Q1, TL432-Q1 SGLS302G – MARCH 2005 – REVISED MAY 2020 TL431-Q1 / TL432-Q1 Adjustable Precision Shunt Regulator 1 Features 1 Qualified for automotive applications AEC-Q100 test guidance with the following: – Device temperature grade 1: –40°C to 125°C ambient operating temperature range Reference voltage tolerance at 25°C: – 1% (A Grade) – 0.5% (B Grade) Typical temperature drift: – 14 mV (Q Temp) Low output noise 0.2-Ω Typical output impedance Sink-current capability: 1 mA to 100 mA Adjustable output voltage: VREF to 36 V 2 Applications Adjustable voltage and current referencing Secondary side regulation in flyback SMPSs Zener replacement Voltage monitoring Comparator with integrated reference 3 Description The TL431LI-Q1 / TL432LI-Q1 are pin-to-pin alternatives to TL431-Q1 / TL432-Q1. TL43xLI-Q1 offers better stability, lower temperature drift (VI(dev)), and lower reference current (Iref) for improved system accuracy. The TL431-Q1 is a three-pin adjustable shunt regulator with specified thermal stability over applicable automotive temperature ranges. The output voltage can be set to any value from VREF (approximately 2.5 V) to 36 V, with two external resistors (see Figure 28). This device has a typical output impedance of 0.2 Ω. Active output circuitry provides a sharp turnon characteristic, making this device an excellent replacement for Zener diodes in man...