TL431A
FEATURES
Adjustable Precision Shunt Regulator
PIN CONNECTIONS
•
Programmable Output Voltage to 40V
•
Low Dynamic Output Impedance 0.2Ω
•
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
R
•
Low Output Noise Voltage
A
K
•
Fast Turn on Respons
•
TO-92 or SOT-23 and SOT-89 ,SO8packages
K
A
TO-92
SOT-89
TL431ACPK
R
TL431ACLP--Bulk Pack
TL431ACLPM-Ammo Pack
R
A
K
SO8
TL431ACMX
A
SOT-23
TL431ALT1
CATHODE
ANODE
ANODE
NC
1
2
3
4
8
7
6
5
REF
ANODE
ANODE
NC
R
K
DESCRIPTION
The TL431A 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 36 volts with two external resistors. These
devices have a typical dynamic output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic,
making these devices excellent replacement for zener diodes in many applications.
The TL431A is characterized for operation from -0
o
C to +70
o
C.
SYMBOL
FUNCTIONAL BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
(Operating temperature range applies unless otherwise specified)
Characteristic
Cathode Voltage
Cathode Current Range (Continuous)
Reference Input Current Range
Power Dissipation at 25
o
C:
TO – 92 Package (R
!
JA
= 178
o
C/W)
SOT – 23 – 3 Package (R
!
JA
= 625
o
C/W)
Junction Temperature Range
Operating Temperature Range
Storage Temperature Range
Symbol
V
KA
I
K
I
REF
P
D
0.7
0.2
0 ~ 150
0 ~ 70
-65 ~ +150
W
W
o
C
o
o
Value
40
100 ~ 150
0.05 ~ 10
Unit
V
mA
mA
T
J
T
g
T
stg
C
C
1
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