© 2007 Fairchild Semiconductor Corporation

www.fairchildsemi.com

Device Number Rev. 1.0.8

KA431/KA431A/KA431L

Programmable Shunt Regulator

Features

• Programmable Output Voltage to 36 Volts

• Low Dynamic Output Impedance 0.20 Typical

Description

The KA431/KA431A/KA431L are three-terminal adjustable

regulator series with a guaranteed thermal stability over

applicable temperature ranges. The output voltage may be

set to any value between VREF (approximately 2.5 volts)

and 36 volts with two external resistors These devices

have a typical dynamic output impedance of 0.2W active

output circuitry provides a very sharp turn on

characteristic,

making

these

devices

excellent

replacement for zener diodes in many applications.

May 2007

• Sink Current Capability of 1.0 to 100mA

• Equivalent Full-Range Temperature Coefficient of

• Temperature Compensated for Operation Over

50ppm/°C Typical

• Low Output Noise Voltage

• Fast Turn-on Response

1

Full Rated Operating Temperature Range