LM431 Pinout Diagram

●Description

●The LM431 is a 3-terminal adjustable shunt regulator with ensured temperature stability over the entire temperature range of operation. The output voltage may be set at any level greater than 2.5 V (VREF) up to 36 V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turnon characteristics this device is an excellent replacement for many Zener diode applications.

●Features

●1• Average Temperature Coefficient 50 ppm/°C

●• Temperature Compensated for Operation Over the Full Temperature Range

●• Programmable Output Voltage

●• Fast Turnon Response

●• Low-Output Noise

●• Low-Dynamic Output Impedance

●• Available in Space-Saving SOIC-8, SOT-23, and TO-92 Packages

●Applications

●• Adjustable Voltage or Current Linear and Switching Power Supplies

●• Voltage Monitoring

●• Current Source and Sink Circuits

●• Circuits Requiring Precision References

●• Zener Diode Replacements