General description

Three-terminal shunt regulator family with an output voltage range between Vref and 36 V, to be set by two external resistors.

• The TL431xDBZR types feature an enhanced stability area with a very low load capacity requirement.

• The TL431xFDT types offer an enhanced stability area and a higher ElectroMagnetic Interference (EMI) ruggedness, for example, for Switch Mode Power Supply (SMPS) applications.

• The TL431xSDT types are designed for standard requirements and linear applications.

Features and benefits

 Programmable output voltage up to 36 V

 Three different reference voltage tolerances:

 Standard grade: 2 %

 A-Grade: 1 %

 B-Grade: 0.5 %

 Typical temperature drift: 6 mV (in a range of 0 C up to 70 C)

 Low output noise

 Typical output impedance: 0.2 

 Sink current capability: 1 mA to 100 mA

 AEC-Q100 qualified (grade 1)

Applications

 Shunt regulator

 Precision current limiter

 Precision constant current sink

 Isolated feedback loop for Switch Mode Power Supply (SMPS)