2

ASTEC Semiconductor

AS1431

Precision Adjustable Shunt Reference

Functional Block Diagram

Absolute Maximum Ratings

Parameter

Symbol

Rating

Units

Cathode-Anode Reverse Breakdown

V

KA

37

V

Anode-Cathode Forward Current

I

AK

1

A

Operating Cathode Current

I

KA

250

mA

Reference Input Current

I

REF

10

mA

Continuous Power Dissipation at 25¡C

P

D

TO-92

775

mW

8L SOIC

750

mW

SOT-89

1000

mW

SOT-23/5L

200

mW

Junction Temperature

T

J

150

¡C

Storage Temperature

T

STG

Ð65 to 150

¡C

Lead Temperature Soldering 10 Seconds

T

L

300

¡C

Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a

stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sec-

tions of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

Ð

+

REFERENCE

(R)

ANODE (A)

CATHODE (K)

2.5 V

Recommended Conditions

Parameter

Symbol

Rating

Unit

Cathode Voltage

V

KA

V

V

Cathode Current

I

K

10

mA

Typical Thermal Resistances

Package

θ

JA

θ

JC

Typical Derating

TO-92

160¡C/W

80¡C/W

6.3 mW/¡C

SOIC

175¡C/W

45¡C/W

5.7 mW/¡C

SOT-89

110¡C/W

8¡C/W

9.1 mW/¡C

SOT-23/5L

575¡C/W

150¡C/W

1.7 mW/¡C