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)

TL431SDT属于集成电路（IC） > 电压基准。恩智浦半导体公司制造生产的TL431SDT电压基准产品属于基准电压源系列，可通过相对较不稳定的电源提供稳定的电势，电压值始终保持恒定，以便在测量、控制和类似应用中用作比较的标准。其功能行为可能与用于大功率调节的线性稳压器相似，但基准电压源器件却不适合用于此类用途。用作比较标准时，若输出电流容量或实际负载电流增大，其性能通常会降低。