SGS Thomson Microelectronics TS431ILT, TS431IZ, TS431AIZ, TS431AILT, TS431 Datasheet



LOW VOLTAGEADJUSTABLE SHUNTREFERENCE

.LOW VOLTAGEOPERATION: 1.24TO 6V

.2% and 1%VOLTAGEPRECISION

.WIDE RANGECATHODE CURRENT : 25µA

TO 30mA

.LOW OUTPUTIMPEDANCE : 0.25W

.HIGH STABILITY WHILE OPERATING WITH

CAPACITIVE LOAD

.ESD PROTECTION:

5kV (HumanBody Model)
200V (MachineModel)

.OPTIMIZED FOR HIGH TEMPERATURES

DESCRI PT ION

TheTS431isa threeterminalsprogrammableshunt
VoltageReferenceoptimizedforhightemperatures.
However, it can operatefrom -40oC up to +125oC.

Theoutputvoltageisset by two externalresistorsto
any value between 1.24 and 6V. When driving an
optocoupler, the TS431 is particularly interestingto
regulate 3.3V switching powersupplies.

ORDER CODES

Part

Number

TS431I -40
TS431AI -40

Temperature

Range

o

C, +125oC

o

C, +125oC

Z

TO92

(PlasticPackage)

L

SOT23-5

Package

ZL

••

••

TS431

SOT23

Marking

L272
L271

PIN CON NE CT IONS (top view)

TO92

(Top view)

1

2

3

March2000

Cathode

Anod e

Refe re nce

NC

NC*

SOT23-5L

(Top view)

1

2

3

* Do not connect this pin or

conne ct it to ground

Anode

5

ReferenceCa thode

4

1/8

TS4 31

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

KA

I

K

I

ref

P

T

oper

T

stg

OPERATING CONDITIONS

Symbol Parameter Value Unit

V

KA

I

K

TS431

ELECTRICAL CHARACTERISTICS T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

ref

∆V

ref

∆∆V

ref

|

V

KA

Iref Reference Input Current I

∆I

ref

I

min

I

off

|Z

| Dynamic Impedance VKA=V

KA

Notes : 1. ∆V

Cathode to Anode Voltage 10 V
Continuous Cathode Current Range -20 to +40 mA
Reference Input Current Range -0.05 to +3 mA
Power dissipation, TO92 package @ T

d

Power dissipation, SO23-5 package @ T

amb.

=25oC

amb.

=25oC

625

500
Operating Free-air Temperature Range -40 to +125
Storage Temperature Range -65 to +150

Cathode to Anode Voltage V

to 6 V

ref

Cathode Current 0.025 to 30 mA

=25oC (unless otherwise specified)

amb

Output Voltage
V

KA=Vref@Ik

= 100µA

Output Voltage Change - note 1

100µA, VKA=V

I

K=

Ratio of Change in Reference Input

|

Voltage to Change in Cathode to

ref

Anode Voltage

Reference Input Current Deviation
Over Temperature Range

Minimum Cathode Current for Regu­lation

Off-State Cathode Current VKA= 6V, V

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

ref

range.
∆V

=V

ref max.-Vref min

ref

T

=25oC 1.215 1.240 1.265 V

amb

0 < Tamb < +70oC
0<T
0<T

-20 < T

-40 < T

-40 < T
I

K

V

KA

K

< +105oC

amb

< +125oC

amb

< +105oC

amb

< +85oC

amb

< +125oC

amb

= 10mA

=6VtoV

ref

= 10mA 30 100 nA

IK= 10mA

= 10kΩ

R

1

= ∝

R

2

V

refmax.

VKA=V

I

ref

ref,f<

= 0.1 to 15mA

K

= 0 0.001 0.1

ref

1kHz

mW

o

C

o

C

15
20
25
30
35
40

2.7 mV/V

30 60 nA

25 40

0.25 0.4

mV

µA

µA

Ω

2/8

V

ref min .

T1

T2

Temperature

TS431

TS431A

ELECTRICAL CHARACTERISTICS T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

|

V

∆V

∆∆V

∆I

|Z

Output Voltage

ref

V

KA=Vref@Ik

Output Voltage Change - note 1

ref

ref

V

KA

100µA, VKA=V

I

K=

Ratio of Change in Reference Input

|

Voltage to Change in Cathode to
Anode Voltage

= 100µA

ref

Iref Reference Input Current I

Reference Input Current Deviation

ref

Over Temperature Range

I

Minimum Cathode Current for

min

Regulation
Off-State Cathode Current VKA= 6V, V

I

off

| Dynamic Impedance VKA=V

KA

=25oC (unless otherwise specified)

amb

T

=25oC 1.228 1.240 1.252 V

amb

0 < Tamb < +70oC
0<T
0<T

-20 < T

-40 < T

-40 < T
I

K

V

KA

K

IK= 10mA
R
R

VKA=V

I

K

< +105oC

amb

< +125oC

amb

< +105oC

amb

< +85oC

amb

< +125oC

amb

= 10mA

=6VtoV

ref

= 10mA 30 100 nA

30 60 nA

= 10kΩ

1

= ∝

2

ref

= 0 0.001 0.1

ref

1kHz

ref,f<

= 0.1 to 15mA

25 40

0.25 0.4

mV

15
20
25
30
35
40

2.7 mV/V

µA

µA

Ω

Notes : 1. ∆V

range.
∆V

ref

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

ref

=V

ref max.-Vref min.

V

V

ref max.

refmin.

T1

T2

Temperature

3/8

TS4 31

1,29

1,28

1,27

1,26

1,25

1,24

1,23

1,22

1,21

1,2

1,19

-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120

Temperature(°C)

Cathode current vs Cathode voltage

15

10

5

0

-5

-10

Reference voltage vs Temperature

Vka=Vref
Ta=25°C

Average

2% range

1% range

Vka=Vref
Ik=100µA

Input

Test circuit forVka=Vref

Output

Ik

Vka

Vref

-15

-1 -0,5 0 0,5 1 1,5
Vka Cathode voltage (V)

Reference input current vs temperature

32,5

32

31,5

31

30,5

30

29,5

29

-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120

Temperature (°C)

Ika = 10mA
R1=10KΩ
R2=inf

Rka (Ohms)
0,34

0,32

0,3

0,28

0,26

0,24

0,22

0,2

0,18

Rka - Static impedance vsTemperature

Vka=Vref

Ika =100µA to 15mA

-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120

Temperature (°C)

4/8

Off State cathode current vs temperature

50

TS431

Test circuit for Off-state current measurement

40

30

20

10

Vka= 6Volts
Vref=0Volts

0

-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120

Temperature(°C)

Ratio of change in Reference input voltage to change

in cathode voltage vs temperature

3

2

1

0

-1

-2

-3

-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120

Temperature (°C)

Input Vka=6V

Ioff

Testcircuit forVka > Vref

Input

R1

R2

Ik

Iref

Vref

Vka

Vka = Vref . (1+R1/R2) + Iref .R1

Gain (dB) Phase (°)
70

60

50

40

30

20

10

0

10 30 100 300 1,000 3,000 10,000 30,000 100,000

Phase & Gain vs Frequency

Gain

Phase

Frequency (Hz)

180

160

140

120

100

80

60

40

Test circuit for Phase & Gain measurements

10µF

Ik=100µA

Input

10µF

6.8K

4.3K

Vref

Output

5/8

TS4 31

Pulse response forIk=100µA

3,5

3

2,5

2

1,5

1

0,5

0

-0,5
012345678

3,5

3

2,5

2

1,5

1

0,5

0

-0,5

012345678

Input

Output

Time sµ

Pulse response for Ik=1mA

Input

Output

Time sµ

Vka=Vref
Ik=100µA
Ta=25°C

Vka=Vref
Ik=1mA
Ta=25°C

Testcircuit for pulse response at Ik=100µA

18KΩ

Ik=100µA

Pulse

Generator

Intput

50Ω

Testcircuit for pulse response at Ik=1mA

1.8KΩ

Ik=1mA

Pulse

Generator

Intput

50Ω

Output

Output

Equivalent Input noise vs frequency

900

800

700

Vka=Vref
Ik=100µA

600

Ta=25°C

500

400

0,1 0,2 0,3 0,40,5 1 2 3 4 5 10 20 30 40 50 100

Frequency (KHz)

6/8

PACKAGE MECHA NI CA L DA TA

SO T23-5 L

TS431

A

E

A2

Dimensions

D

E1

Millimeters Inches

Min. Max. Min. Max.

b

A1

L

C

A 0.90 1.45 0.035 0.057
A1 0.15 0.005
A2 0.90 1.30 0.035 0.051

b 0.35 0.50 0.013 0.019

C 0.09 0.20 0.003 0.007
D 2.80 3.00 0.110 0.118

E 2.60 3.00 0.102 0.118
E1 1.50 1.75 0.059 0.068

L 0.10 0.60 0.003 0.023

7/8

TS4 31

PACKAGE MECHA NI CA L DA TA

3 PINS - PLASTIC PACKAGE TO92

Dimensions

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

Millimeters Inches

L 1.27 0.05
B 3.2 3.7 4.2 0.126 0.1457 0.1654

O1 4.45 5.00 5.2 0.1752 0.1969 0.2047

C 4.58 5.03 5.33 0.1803 0.198 0.2098
K 12.7 0.5

O2 0.407 0.5 0.508 0.016 0.0197 0.02

a 0.35 0.0138

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