TL431AF

误差1%

DESCRIPSION

The TL431 is a three-terminal adjustable shunt regulator with specified thermal stability over applicable temperature VREFApprox. 2.5V and 40V with two external resistors. This device has a typical dynamic output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making this device excellent replacement for zener diodes in many applications. The TL431 is characterized for operation from -40℃to +125℃.

FEATURES

Programmable Output Voltage to 40V

Guaranteed 0.5% Reference Voltage Tolerance

Low 0.2Ω Typ. Dynamic Output Impedance

Cathode Current RangeContinuous – 100 ~ 150 mA

Equivalent Full Range Temperature Coefficient of 50PPM/℃

Temperature Compensated For Operation Over Full Rate Operating Temperature Range

Low Output Noise Voltage

Fast Turn-on Response

TO-92, SOT-89 or SOT-23 3L Package

APPLICATION

Shunt Regulator

Precision High-Current Series Regulator

High-Current Shunt Regulator

Crowbar Circuit

PWM Converter With Reference

Voltage Monitor

Precision Current Limiter