TL431XFDT Datasheet PDF - NXP Semiconductors.

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)