TL431CPW

TL431CPW 1 Features

– 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 Noise0.2-Ω Typical Output Impedance • • • Sink-Current Capability: 1 mA to 100 mA

TL431CPW 3 Description

The TL431LI / TL432LI are pin-to-pin alternativesto TL431 / TL432. TL43xLI offers better stability,lowerand lowerreference currentimproved systemaccuracy.temperature drift(VI(dev)),(Iref)forto any value between VrefThe TL431 and TL432 devices are three-terminaladjustable shunt regulators, with specified thermalstability over applicable automotive, commercial, andmilitary temperature ranges. The output voltage can(approximatelybe set2.5 V) and 36 V, with two external resistors. Thesedevices have a typical output impedance of 0.2 Ω.Active output circuitry provides a very sharp turn-onexcellentcharacteristic, makingreplacements for Zener diodes in many applications,such as onboard regulation, adjustable powersupplies, and switching power supplies. The TL432device has exactly the same functionality andelectrical specifications as the TL431 device, but hasdifferent pinouts for the DBV, DBZ, and PK packages.devicestheseBoth the TL431 and TL432 devices are offered inthree grades, with initial tolerances (at 25°C) of 0.5%,the B, A, and standard grade,1%, and 2%,respectively.low output drift versustemperature ensures good stability over the entiretemperature range.In addition,forThe TL43xxC devices are characterized for operationfrom 0°C to 70°C,the TL43xxI devices arecharacterized for operation from –40°C to 85°C, andthe TL43xxQ devices are characterized for operationfrom –40°C to 125°C.Device Information(1)

TL431CPW 2 Applications

• Adjustable Voltage and Current Referencing • Secondary Side Regulation in Flyback SMPSs • Zener Replacement • Voltage Monitoring • Comparator with Integrated ReferenceSimplified Schematic