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ASTEC Semiconductor

AS1431

Precision Adjustable Shunt Reference

Features

to125¡C

impedance: < 150 m½

Description

The AS1431 is a three-terminal adjustable shunt regulator providing a

highly accurate 0.4% bandgap reference. The adjustable shunt regulator

is ideal for a wide variety of linear applications that can be implemented

using external components to obtain adjustable currents and voltages.

In the standard shunt configuration, the combination of low temperature

coefficient (TC), sharp turn-on characteristics, low output impedance and

programmable output voltage make this precision reference a perfect

zener diode replacement.

The AS1431 is characterized to operate over the full automotive tem-

perature range of Ð55 to 125¡C and is now available in the SOT-23 (5L)

package.

SEMICONDUCTOR

Ordering Information

CATHODE

TO-92 (LP)

SOIC (D)

ANODE

REFERENCE

CATHODE

REFERENCE

ANODE

ANODE

N/C

CATHODE

ANODE

ANODE

N/C

SOT-89 (S)

SOT-23/5L (DBV)

ANODE

REFERENCE

1

2

3

4

8

7

6

5

REFERENCE

ANODE

N/C

N/C

CATHODE

Circuit Type:

Precision Adjustable

Shunt Regulator

Temperature Range:

D = –55

°C to +125°C

Bandgap Tolerance:

R4 =

±0.4%

AS1431 D R4 D 7

Packaging Option:

A

B

T

7

13

Package Style:

D

DBV

LP

S

= SOIC

= SOT-23/5L

= TO-92

= SOT-89

= Ammo Pack

= Bulk

= Tube

= Tape and Reel (7" Reel Dia)

= Tape and Reel (13" Reel Dia)