©2011 Fairchild Semiconductor Corporation

www.fairchildsemi.com

Rev. 1.0.9

Features

• Programmable Output Voltage to 36 Volts

• Sink Current Capability of 1.0 to 100mA

• Equivalent Full-Range Temperature Coefficient of

50ppm/

°C Typical

• Temperature Compensated for Operation Over Full Rated

Operating Temperature Range

• Low Output Noise Voltage

• Fast Turn-on Response

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

circuitry provides a very sharp turn on characteristic, making

these devices excellent replacement for zener diodes in many

applications.

TO-92

8-DIP

8-SOP

1. Ref 2. Anode 3. Cathode

1

1

1

1.Cathode 2.3.6.7.Anode

4.5.NC 8.Ref

1.Cathode 2.3.4.5.7.NC

6.Anode 8.Ref

Internal Block Diagram

2.5 Vref

CATHODE

ANODE

REFERENCE

ANODE(A)

REFERENCE (R)

CATHODE (K)

+

-

KA431/KA431A/KA431L

Programmable Shunt Regulator