©2005 Fairchild Semiconductor Corporation

www.fairchildsemi.com

Rev. 1.0.6

Features

• Programmable Output Voltage to 36 Volts

• Low Dynamic Output Impedance 0.20 Typical

• 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 KA431S/KA431SA/KA431SL are three-terminal

adjustable regulator series with a guaranteed thermal

stability over applicable temperature ranges. The output

(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.

SOT-23F

1

2

3

MF-

1.Cathode 2. Ref 3. Anode

MF2- 1. Ref 2. Cathode 3. Anode

Internal Block Diagram

2.5 Vref

CATHODE

ANODE

REFERENCE

ANODE(A)

REFERENCE (R)

CATHODE (K)

+

-

KA431S/KA431SA/KA431SL

Programmable Shunt Regulator