Datasheet TS2431ILT, TS2431AILT, TS2431BILT, TS2431 Datasheet (SGS Thomson Microelectronics)

TS2431

PROGRAMMABLE SHUNT VOLTAGE REFERENCE

■ ADJUSTABLE OUTPUT VOLTAGE

2.5 to 24V

■ SEVERAL PRECISION @ 25°C

±2%, ±1% and ±0.5%

■ SINK CURRENT CAPABILITY

1 to 100mA

■ INDUSTRIAL TEMPERAT URE RANGE:

-40 to +105°C

■ PERFORMANCES COMPATIBL E WI TH

INDUSTRY STANDARD TL431

DESCRIPTION

The TS2431 is a programmable shunt voltage
reference with guaranteed temperature stability
over the entire temperature range of operation
(-40 to +105°C). The output voltage may be set to
any value between 2.5V and 24V with an external
resistor bridge.

Available in SOT23-3 s urface mount package, it
can be designed in applications where space
saving is a critical issue.

APPLICATION

L

SOT23-3L

(Plastic Micropackage)

PIN CONNECTIONS (top view)

■ Computers

■ Instrumentation

■ Battery chargers

■ Switch Mode Power Supply

■ Battery operated equipments

ORDER CODE

Precision

2% TS2431ILT L285
1% TS2431AILT L286

0.5% TS2431BILT L287

Single temperature range: -40 to +105°C

LT = Tiny Package (SOT23-3) - only available in Tape & Reel (LT)

February 2002

Part Number

in SOT23-3

SOT23

Marking

Cathode

Reference

1

3

TS2431

2

SOT23-3

Anode

1/6

TS2431

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

Vka Cathode to Anode voltage 25 V

I

Reverse Breakdown Current -100 to +150 mA

K

I

T

ESD

T

LEAD

1. Pd has been ca l culated wi th Ta mb = 25°C, Tjunction =150°C and Rth j a = 340°C/W for the SOT23-3 package

OPERATING CONDITIONS

Symbol Parameter Value Unit

V

T

1. Maximum power dissipation must be st ri ctly obser ved to avoid t he component destruction.

Reference input current range -0.05 to +10 mA

REF

P

Power Dissipation

d

Storage Temperature -65 to +150 °C

std

1)

SOT23-3

360 mW

Human Body Model (HBM) 2 kV
Machine Model (MM) 200 V
Lead Temperatue (soldering, 10 seconds) 260 °C

to 24

Cathode to Anode voltage

KA

I

Cathode operating current

K

Operating Free Air Temperature Range -40 to +105 °C

oper

1)

V

REF

1 to 100 mA

V

ELECTRICAL CHARACTERISTICS

T

AMBIENT

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

|∆

I

∆Vref

---------------

∆Vk

|∆

= 25°C (unless otherwise specified)

Reference input Voltage VK=V

REF

Reference input Voltage deviation over
temperature, V

V

T

KMIN

I

REF

I

REF

I

OFF

Z

|

KA

E

|

REF

(note 1,2)
Temperature coefficient (note 2) -40°C < T < +105°C 50 100 ppm/°C

C

Minimum Operating Current

Ratio of change in reference input
voltage to change in catho de to anode
voltage

Reference input current
I

=10mA, R1=10K

K

Reference input current deviation

|

I

=10mA, R1=10K

K

Off-state cathode current

|

Reverse dynamic impedance

Wide Band Noise

N

, IK=10mA

K=VREF

R2=+ (note 3)

Ω,

R2=+ (note 3)

Ω,

, IK=10mA

REF

2.5
TS2431 (2%) 2.45 2.55
TS2431A (1%) 2.475 2.525
TS2431B (0.5%) 2.488 2.512
0°C < T < +70°C 10 20

-40°C < T < +105°C 20 35

T = 25°C 0.3 0.8

-40°C < T < +105°C 1

I

=10mA

K

Vka= 24 to 2.5V

0.3 2 mV/V

T=25°C 0.5 2.5

∞
∞

-40°C < T < +105°C 3

-40°C < T < +105°C 0.4 1.2 µA

=24V, V

V

K

V

K=VREF

I

∆

=1 to 50mA, f<10kHz

K

Ik = 10mA
10Hz < f < 10kHz

REF

=GND

10 500 nA

0.5 0.75

300 nV/√Hz

V

mV-40°C < T < +85°C 17 30

mA

µA

Ω

Note 1: Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design.
Note 2:
Note 3: Refer to figure "Test circuit for Vka>Vref" page 4

V

|∆

| is defined as the difference between the maximum and minimum values of V

REF

obtained over the full temperature range

REF

2/6

TS2431

Reference voltage vs tempera ture

2.52

2.51

2.50

Voltage reference (V)

2.49

2.48

-40-200 20406080100

Temp er atur e (°C)

Ik =10 mA
Vka = Vref

Cathode voltage vs cathode curren t

3

2

1

0

Vka Cathode voltage (V)

-1

-0.10 -0.05 0.00 0.05 0.10

Ika Cathode current (A)

Vka = Vref

T=25°C

Test circuit for Vka = Vref

Input

Ik

Vka

Vref

Cathode voltage vs cathode curren t

3

T=-40°C

2

1

Vka Cathode voltage (V)

T=+105°C

0

0 100 200 300 400

T=+25°C

Vka = Vref

Ik Cathode current (µA)

Output

Reference input current vs temperature

1.00

0.75

0.50

Reference input current (µA)

0.25

0.00

-40-200 20406080100

Temp er atu re (° C)

Ik=10mA
R1=10K
R2=+∞

Ω

Dynamic impedance vs frequency

5

4

3

2

Zka Dynamic impedance (Ohms)

1

0

10 100 1000 10000 100000 1000000

Vka=Vref
Ik=1mA

T=25°C

Frequency (Hz)

3/6

TS2431

Off-State current vs temperature

0.3

0.2

Off-s tate cur rent (µ A)

0.1

0.0

-40-200 20406080100

Temperature (°C)

Ratio of change in reference input voltage to
change in Vka voltage vs temperature

0.4

0.3

Vka (mV/V)

0.2

∆

Vref /

∆

0.1

∆Vka=24 to 2.5V

Ik=10mA

T=25°C

Test circuit for Off-State current measurement

Vka=24V

Ioff

Test circuit for Vka > Vref

Input

R1

R2

Ik

Iref

Vref

Vka

0.0

-40 -20 0 20 40 60 80 100

Temperature (°C)

Phase and Gain vs frequency

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

Test circuit for phase and gain measuremen t

4/6

TS2431

Pulse response at Ik=1mA

6

4

Voltage (V)

2

0

0.0 0.5 1.0 1.5 2.0

Input voltage

Output voltage

Time (µs)

Pulse response at Ik = 1mA

6

Input voltage

4

Voltage (V)

2

Output v oltage

Ik= 0 to 1mA

T=25°C

Ik= 1mA to 0

T=25°C

Test circuit for pulse response at Ik = 1mA

Ω

2.5 K

Ik=1mA

Pulse
Generator
F=100kHz

0 to 5V

Intput

Output

Equivalent input noise vs frequency

300

250

200

Hz)

√

150

100

Noise (nV /

50

Vka=Vref

Ik=1m A

T=25°C

0

0.0 0.5 1.0 1.5 2.0

Time (µs)

Stability boundary conditions

100

80

60

Vka=3 V

40

Cathode current (mA)

20

Vka=2.5 V

0

1E-101E-91E-81E-71E-61E-5

Instable

area

Capacitive load (F)

Stable

area

Vka=5 V

0

0.1 1 10 100 1000

Block Diagram

Frequency (KHz)

5/6

TS2431

PACKAGE MECHANICAL DATA
3 PINS - TINY PACKAGE (SOT-23)

E

SEATING
PLANE

C

D

e

E1

b

e1

A2

A1

GAUGE
PLANE

C

0.10

A

0.25

k

L

L1

c

Millimeters Inches

Dimensions

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

A 0.890 1.120 0.035 0.044
A1 0.010 0.100 0.0004 0.004
A2 0.880 0.950 1.020 0.037 0.040

b 0.300 0.500 0.012 0.020

c 0.080 0.200 0.003 0.008
D 2.800 2.900 3.040 0.110 0.114 0.120
E 2.100 2.640 0.083 0.104

E1 1.200 1.300 1.400 0.047 0.051 0.055

e 0.950 0.037

e1 1.900 0.075

L 0.400 0.500 0.600 0.016 0.020 0.024

L1 0.540 0.021

k 0° 8°

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