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)