CM431

Champion Microelectronic Corporation

Page 1

GENERAL DESCRIPTION

FEATURES

Initial voltage reference accuracy of 1.0%.

Sink current capability from 1mA to 100mA

Typical output dynamic impedance less than 200m

Ω;

Adjustable output voltage from V

B

Available in SOT-23, SOT-89, TO-92, & SOP-8

Low output noise

Typical equivalent full range temperature coefficient of

30ppm/

P

O

P

C

APPLICATIONS

The CM431 is a three-terminal adjustable shunt voltage regulator

with specified thermal stability and pin-to-pin compatible with the

earlier 431 series. The output voltage can be adjusted to any

value between V

B

CM431 offers low output impedance for improved load regulation

with a typical output impedance of 200m

Ω. Because of the

active output circuitry, the CM431 can replace the zener diodes in

applications such as switching power supplies, OVP crowbar

circuits, references for A/D, D/A converters with improved turn-on

characteristics.

Voltage Reference

Precision shunt regulator

High current shunt regulator

PWM down converter with reference

Voltage monitor

PIN CONFIGURATION

TO-92

Front View

1

23

SOT-23-3

Top View

1

3

2

SOT-23-5

Top View

1

5

3

2

4

SOT-89

Top View

1

23

SOP-8

Top View

1

2

3

4

8

7

6

5

CATHODE

NC

NC

NC

REF

NC

ANODE

NC

CM431XCM233

CM431XCM2R3

Pin 1

REF

CATHODE

Pin 2

CATHODE

REF

Pin 3

ANODE

ANODE

Suffix “X”: Grade “A”, “B”, “C”, or “D”