TL431M3 datasheet(2/6 Pages) CYSTEKEC

Nome de Peças	TL431M3

Descrição Electrónicos	Adjustable Precision Shunt Regulators

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Fabricante Electrônico	CYSTEKEC [Cystech Electonics Corp.]

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CYStech Electronics Corp.

Spec. No. : C502M3

Issued Date : 2003.04.02

Revised Date : 200712.24

Page No. : 2/6

TL431M3

CYStek Product Specification

Functional Block Diagram

& Symbol

Test Circuits

Electrical Characteristics ( Ta=25

°C unless otherwise specified )

Functional Block Diagram :

Symbol :

Characteristics

Symbol

Test Conditions

Min

Typ

Max Unit

TL431A

2.483 2.495 2.507

TL431B

2.470 2.495 2.520

Reference Input Voltage

TL431C

VREF

VKA=VREF, IK=10mA

2.445 2.495 2.545

V

Deviation of Reference Input Voltage

Over-Temperature (Note)

VREF(dev)

VKA=VREF, IK=10mA

Tmin

≤Ta≤Tmax

-

4.5

17

mV

IK=10mA,

ΔVKA=10V~VREF

-

-1.0

-2.7

Ratio of Change in Reference Input

Voltage to the Change in Cathode

Voltage

ΔVREF /

ΔVKA IK=10mA,

ΔKKA=36V~10V

-

-0.5

-2.0

mV/

V

Reference Input Current

IREF

IK=10mA, R1=10k

Ω,

R2=

∞

-

1.5

4

μA

Deviation of Reference Input Current

Over Full Temperature Range

IK=10mA, R1=10k

Ω,

R2=

∞, Ta=Full Range

-

0.4

1.2

μA

IREF(dev)

Minimum Cathode Current for

Regulation

IK(min)

VKA=VREF

-

0.45

1.0

mA

Off-State Cathode Current

IK(off)

VKA=36V, VREF=0

-

0.05

1.0

μA

Dynamic impedance

VKA=VREF, f

≤1.0KHz

|ZKA|

-

0.15

0.5

Ω

IK=1 to 100mA

Note : Tmin=0℃, Tmax=70℃

IN

VZ

Fig3. Test Circuit for Off-State

Current

Fig 2. Test Circuit for VZ>VREF

Note : VZ=VREF(1+R1/R2)+IREFxR1

VREF

R2

IZ

IREF

IN

VZ

II

Fig1. Test Circuit for VZ=VREF

R1

VZ

IZ

VREF

IREF

II

IN

Anode

Reference

+

-

VREF

Cathode

Anode

Reference

Cathode

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