© 2002 Fairchild Semiconductor Corporation

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KA431S / KA431SA / KA431SL Rev. 6.7

March 2015

KA431S / KA431SA / KA431SL

Programmable Shunt Regulator

Features

• Programmable Output Voltage to 36 V

• Low Dynamic Output Impedance 0.2 Ω (Typical)

• Sink Current Capability: 1.0 to 100 mA

• Equivalent Full-Range Temperature Coefficient of

50 ppm/°C (Typical)

• Temperature Compensated for Operation Over

Full Rated Operating Temperature Range

• Low Output Noise Voltage

• Fast Turn-on Response

Ordering Information

Part Number

Operating

Temperature

Range

Output Voltage

Tolerance

Top Mark

Package

Packing Method

KA431SMFTF

-25 to +85°C

2%

43A

SOT-23F 3L

Tape and Reel

KA431SMF2TF

43D

KA431SAMFTF

1%

43B

KA431SAMF2TF

43E

KA431SLMFTF

0.5%

43C

KA431SLMF2TF

43F

Description

The KA431S / KA431SA / KA431SL are three-terminal

adjustable regulator series with a guaranteed thermal

stability over the operating temperature range. The out-

(approximately 2.5 V) and 36 V with two external resis-

tors. These devices have a typical dynamic output

impedance of

0.2 Ω. Active output circuitry provides a

sharp turn-on characteristic, making these devices

excellent replacement for zener diodes in many applica-

tions.

SOT-23F

1

2

3

MF- 1.Cathode 2. Ref 3. Anode

MF2- 1. Ref 2. Cathode 3. Anode