SGS Thomson Microelectronics TL431IN, TL431ID, TL431CZ, TL431IZ, TL431AIZ Datasheet



PROGRAMMABLE VOLTAGE REFERENCE

.

ADJUSTABLE OUTPUTVOLTAGE :

2.5 to 36V

.

SINK CURRENTCAPABILITY :1 to 100mA

.

TYPICALOUTPUT IMPEDANCE: 0.22Ω

.

1%AND 2% VOLTAGEPRECISION

TL431

Z

TO92

(Plastic Package)

N

DIP8

(Plastic Package)

DESCRIPTION

The TL431is a programmableshuntvoltagerefer­ence with guaranteed temperature stability over
the entire temperature range of operation.
The output voltage may be set to any value be­tween V
externalresistors.
The TL431operateswithawide currentrangefrom
1 to 100mA with a typical dynamic impedance of

0.22Ω.

PIN CONNECTIONS

Cathode Anode Reference

(approximately2.5V) and 36Vwith two

ref

TO92

(Topview)

123

DIP8

(Top view)

8765

1234

(Batwing Plastic Micropackage)

ORDER CODES

Part number Temperature Range

o

TL431C/AC 0
TL431I/AI -40

1 - Cathode
2 - N.C.
3 - N.C.
4 - N.C.
5 - N.C.
6 -Anode
7 - N.C.
8 - Reference

C, +70oC •••

o

C, +105oC •••

SO8

(Top view)

8765

1234

D

SO8

Package

ZND

1 - Cathode
2 -Anode
3 -Anode
4 - N.C.
5 - N.C.
6 -Anode
7 -Anode
8 - Reference

November 1998

1/9

TL431

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

KA

I

K

I

ref

T

oper

T

stg

OPERATING CONDITIONS

Symbol Parameter Value Unit

V

KA

I

K

ELECTRICALCHARACTERISTICS

=25oC (unless otherwisespecified)

T

amb

Symbol Parameter

V

ref

∆V

ref

∆V

ref

∆V

KA

Iref Reference InputCurrent - (figure 2)

∆I

ref

I

min

I

off

| Dynamic Impedance - (figure 1, note 2)

|Z

KA

Cathode to Anode Voltage 37 V
Continuous Cathode Current Range -100 to +150 mA
Reference Input Current Range -0.05 to +10 mA
Operating Free-air Temperature Range TL431C/AC

TL431I/AI

0 to +70

-40 to +105

Storage Temperature Range -65 to +150

Cathode to Anode Voltage V

to 36 V

ref

Cathode Current 1 to 100 mA

TL431C TL431AC

Min. Typ. Max. Min. Typ. Max.

Reference InputVoltage - (figure1)

V

KA=Vref,IK

= 10mA T

≤ T

T

min.

amb

≤ T

max.

amb

=25oC

2.44

2.423

2.495 2.55

2.567

2.47

2.453

2.495 2.52

2.537

Reference InputVoltage Deviation Over
Temperature Range - (figure 1, note1)

V

KA=Vref,IK=

10mA,T

min.

≤ T

amb

≤ T

max.

317 315

Ratio of Change in Reference Input Voltage to
Change in Cathode to Anode Voltage - (figure 2)

=10mA ∆VKA= 10V to V

I

K

= 10mA, R1=10kΩ,R2=∞

I

K

∆VKA= 36V to 10V

=25oC

T

amb

≤ T

T

min.

amb

≤ T

ref

max.

-1.4-1-2.7

-2

1.8 4

5.2

-1.4-1-2.7

-2

1.8 4

5.2

Reference InputCurrent Deviation Over
Temperature Range - (figure 2)

= 10mA, R1=10kΩ,R2=∞

I

K

T

min.

≤ T

amb

≤ T

max.

0.4 1.2 0.4 1.2

Minimum Cathode Current for Regulation - (figure 1)

V

KA=Vref

0.5 1 0.5 0.6

Off-State CathodeCurrent - (figure 3) 2.6 1000 2.6 1000 nA

V

KA=Vref

, ∆IK= 1 to 100mA, f ≤ 1kHz 0.22 0.5 0.22 0.5

o

C

o

C

mV/V

Unit

V

mV

µA

µA

mA

Ω

Notes : 1. ∆V

2. The dynamic Impedance is defined as |ZKA| =

isdefined as the difference between the maximum and minimum values obtained over the full temperature

ref

range.
∆V

ref=Vrefmax.-Vrefmin

2/9

V

V

ref ma x.

re fmin.

T1

∆V

∆I

T2

KA
K

Temp era ture

ELECTRICALCHARACTERISTICS

=25oC (unless otherwisespecified)

T

amb

Symbol Parameter

V

∆V

∆V

∆V

Iref Reference InputCurrent - (figure 2)

∆I

I

|Z

Reference InputVoltage - (figure1)

ref

ref

ref

KA

ref

min

I

off

| Dynamic Impedance - (figure 1, note 2)

KA

V

KA=Vref,IK

Reference InputVoltage Deviation Over
Temperature Range - (figure 1, note1)

V

KA=Vref,IK=

Ratio of Change in Reference Input Voltage to
Change in Cathode to Anode Voltage - (figure 2)

=10mA ∆VKA= 10V to V

I

K

= 10mA, R1=10kΩ,R2=∞

I

K

Reference InputCurrent Deviation Over
Temperature Range - (figure 2)

= 10mA, R1=10kΩ,R2=∞

I

K

Minimum Cathode Current for Regulation - (figure 1)

V

KA=Vref

Off-State CathodeCurrent - (figure 3) 2.6 1000 2.6 1000 nA

V

KA=Vref

= 10mA T

≤ T

T

min.

10mA,T

min.

∆VKA= 36V to 10V

=25oC

T

amb

≤ T

T

min.

≤ T

T

min.

, ∆IK= 1 to 100mA, f ≤ 1kHz 0.22 0.5 0.22 0.5

amb

≤ T

amb

amb

≤ T

amb

≤ T

≤ T

max.

≤ T

max.

max.

TL431

TL431I TL431AI

Min. Typ. Max. Min. Typ. Max.

=25oC

amb

max.

ref

2.44

2.41

2.495 2.55

2.58

2.47

2.44

2.495 2.52

730 730

-1.4-1-2.7

-1.4-1-2.7

-2

1.8 4

1.8 4

6.5

0.8 2.5 0.8 1.2

0.5 1 0.5 0.7

Unit

V

2.55
mV

mV/V

-2
µA

6.5
µA

mA

Ω

Notes : 1. ∆V

2. The dynamic Impedance is defined as |ZKA| =

isdefined as the difference between the maximum and minimum values obtained over the full temperature

ref

range.
∆V

=V

refmax.-Vrefmin

ref

V

ref ma x.

V

re fmin.

T1 T2

∆V

Temp era ture

KA

∆I

K

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