Advanced Monolithic Systems, Inc.

6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

Advanced

AMS431

Monolithic

PRECISION ADJUSTABLE SHUNT REGULATOR

Systems

FEATURES

APPLICATIONS

•• Trimmed 0.25% Reference

•• Battery Powered Systems

•• Wide Operating Current Range 250µµA to 150mA

•• Switching Power Supplies

•• Low Dynamic Output Impedance

•• Adjustable Power Supplies

•• Low Output Noise

•• Linear Regulators

•• Nominal Temperature Range to 85°°C

•• Error Amplifiers

•• Temperature-Compensated: 60ppm/°°C

•• Notebook/Personal Computer

•• Internal Amplifier with 150mA Capability

•• Monitors/ VCR/ TV

•• Pagers

GENERAL DESCRIPTION

The AMS431 is a three-terminal adjustable shunt regulator with guaranteed temperature stability over the entire range of

operation. The output voltage can be set to any value between 2.5V (VREF) and 36V by adding two external resistors. Due to

the sharp turn-on characteristics this device is an excellent replacement for zener diodes in many applications.

AMS431 is available in TO-92, SO-8, SOT-89 and SOT-23 packages.

ORDERING INFORMATION:

TOL.

PACKAGE TYPE

OPERATING

TO-92

8 LEAD SOIC

SOT-89

3 LEAD SOT-23

TEMP. RANGE

±0.25%

AMS431AN

AMS431AS

AMS431AL

AMS431AM

-40 to +85

° C

±0.5%

AMS431BN

AMS431BS

AMS431BL

AMS431BM

-40 to +85

° C

±1.0%

AMS431CN

AMS431CS

AMS431CL

AMS431CM

-40 to +85

° C

PIN CONNECTIONS

TO-92

8L SOIC

SOT-89

3L SOT-23

Plastic Package (N)

SO Package (S)

(L)

(M)

1

2

3

REF

ANODE

CATHODE

2

8

3

4

7

6

5

ANODE

N/C

N/C

ANODE

ANODE

ANODE

1

REF

CATHODE

1

2

3

CATHODE

ANODE

REF

CATHODE

REF

ANODE

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