AS431 datasheet(5/17 Pages) BCDSEMI

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ADJUSTABLE PRECISION SHUNT REGULATORS

AS431

Nov. 2005 Rev. 1. 1

BCD Semiconductor Manufacturing Limited

Data Sheet

Parameter

Test

Circuit

Symbol

Conditions

AS431

Unit

Min

Typ

Max

Reference Voltage

0.4%

VREF

VKA=VREF, IKA=10mA

2.490

2.500

2.510

0.8%

2.480

2.500

2.520

Deviation of Reference

Voltage Over-temperature

∆V

REF

VKA=VREF

IKA=10mA

0 to 70oC

4.5

-40 to 85oC

4.5

Ratio of Change in Reference

Voltage to the Change in

Cathode Voltage

∆V

REF

∆V

IKA=10mA

∆V

KA=

10V to VREF

-1.0

-2.7

mV/V

∆V

KA=

36V to 10V

-0.5

-2.0

Reference Current

IREF

IKA=10mA, R1=10KΩ, R2=∞

0.7

µA

Deviation of Reference Current

Over Full Temperature Range

∆I

REF

IKA=10mA, R1=10KΩ

R2=

∞, T

A=-40 to 85

0.4

1.2

µA

Minimum Cathode Current for

Regulation

IKA

(Min)

VKA=VREF

0.4

1.0

Off-state Cathode Current

IKA

(Off)

VKA=36V, VREF=0

0.05

1.0

µA

Dynamic Impedance

ZKA

VKA=VREF, IKA=1 to 100mA,

≤ 1.0KHz

0.15

0.5

Ω

Electrical Characteristics for AS431

Operating Conditions: TA=25

oC, unless otherwise specified.

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