PROGRAMMABLE PRECISION REFERENCES
TL431
FEATURES
Programmable Output Voltage to 40V
Low Dynamic Output Impedance 0.2
Sink Current Capability of 0.1 mA to 100 mA
Equivalent Full-Range Temperature Coefficient of 50
ppm/
o
C
Temperature Compensated for Operation over Full Rated
Operating Temperature Range
Low Output Noise Voltage
Fast Turn on Respons
TO-92, SOP- 8, SOT-89 or SOT-23 packages
PIN CONNECTIONS
SOT-23 SOT-89 SOP-8 TO-92
Top View
DESCRIPTION
The TL431 is a three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges.
The output voltage may be set to any value between Vref (approximately 2.5 volts) and 40 volts with two external resistors. These
devices have a typical dynamic output impedance of 0.2
. Active output circuitry provides a very sharp turn-on characteristic,
making these devices excellent replacement for zener diodes in many applications.
The TL431 is characterized for operation from -25
o
C to +85
o
C.
SYMBOL FUNCTIONAL BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
(Operating temperature range applies unless otherwise specified)
Characteristic Symbol
Value
Unit
Cathode Voltage
V
KA
40
V
Cathode Current Range (Continuous)
I
K
-100 ~ 150
mA
Reference Input Current Range
I
REF
0.05 ~ 10
mA
Power Dissipation at 25
o
C:
SOP, TO 92 Package (R
JA
= 178
o
C/W)
SOT Package (R
JA
= 625
o
C/W)
P
D
0.7
0.2
W
W
Junction Temperature Range
T
J
0 ~ 150
o
C
Operating Temperature Range
T
g
-25 ~ +85
o
C
Storage Temperature Range
T
stg
-65 ~ +150
o
C
INTEGRAL
info@integralkorea.com
1
PROGRAMMABLE PRECISION REFERENCES
TL431
RECOMMENDED OPERATING CONDITIONS
Characteristic Symbol
Test
Condition
Min
Typ
Max
Unit
Cathode Voltage
V
KA
V
REF
40 V
Cathode Current
I
K
0.5
100
mA
ELECTRICAL CHARACTERISTICS
(T
a
= 25
o
C, V
KA
= V
REF
, I
K
= 10mA unless otherwise specified)
Characteristic Symbol
Test
Condition
Min
Typ
Max
Unit
Reference Input Voltage
V
REF
V
KA
=
V
REF
, I
K
= 10mA
TL431
TL431-A
TL431-C
2.440
2.470
2.482
2.495
2.495
2.495
2.550
2.520
2.508
V
Deviation of Reference Input
Voltage Over Full Temperature
Range
V
REF(dev)
T
min
Ta T
max
3 17 MV
Ratio of Change in Reference Input
Voltage to the Change in Cathode
Voltage
V
V
REF
K A
V
KA
=
10V-V
REF
V
KA
=
36V- 10V
-1.4
-1.0
-2.7
-2.0
mV/V
Reference Input Current
I
REF
R
1
= 10K
, R
2
=
1.8 4
A
Deviation of Reference Input
Current Over Full Temperature
Range
I
REF(dev)
R
1
= 10K
, R
2
=
0.4
1.2
A
Minimum Cathode Current for
Regulation
I
K(min)
0.25
0.5
mA
Off-State Cathode Current
I
K(off)
V
KA
= 40
V,
V
REF
= 0
0.26
0.9
A
Dynamic Impedance
Z
KA
I
K
= 10mA to 100 mA , f
1.0KHz
0.22 0.5
TEST CIRCUITS
Fig.1. Test Circuit for V
KA
= V
REF
Fig.2. Test Circuit for V
KA
V
REF
Fig.3. Test Circuit for I
off
TL431
I
K(OFF)
INPUT
V
KA
TL431
BT432
TL431
INTEGRAL
info@integralkorea.com
2
PROGRAMMABLE PRECISION REFERENCES
TL431
PAD LAYOUT
Y
0,0 X
Chip size: 0,81x 0,76
Pad size : 94 x 94
Unit :
m
3
2
1
PAD LOCATION
Unit:
m
Pad No.
Pad Name
Description
X
Y
1 R Reference
-314 -299
2
A
Anode
-75 -275
3 K
Cathode
231 -299
PHYSICAL CHARACTERISTIC
Wafes dia
100 mm (4")
Wafes width
350
20m
Scribe width
90
m
Passivation
PSG
Backside metallization
Without
metallization
INTEGRAL
info@integralkorea.com
3
PDF 
ZIP