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TL431Datasheet PDF
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PROGRAMMABLE PRECISION SHUNT REGULATOR TL431/A/C
2008 – Rev. 1.2 - 1 - HTC
TO-92 PKG
3
2
1
SOT-23 PKG
2
1 3
SOT-89 PKG
1 2 3
PIN 1. Reference 2. Anode 3. Cathode
ORDERING INFORMATION
Device (Marking) Package
TL431 TO-92(Bulk)
TL431TA TO-92(Taping)
TL431SF SOT-23 3L
TL431F SOT-89 3L
FEATURES
z Programmable Output Voltage to 40V
z Guaranteed 0.5% Reference Voltage Tolerance
z Low (0.2Ω Typ.) Dynamic Output Impedance
z Cathode Current Range(Continuous) – 100 ~ 150 mA
z Equivalent Full Range Temperature Coefficient of
50PPM/℃
z Temperature Compensated For Operation Over
Full Rate Operating Temperature Range
z Low Output Noise Voltage
z Fast Turn-on Response
z TO-92, SOT-89 or SOT-23 3L Package
APPLICATION
z Shunt Regulator
z Precision High-Current Series Regulator
z High-Current Shunt Regulator
z Crowbar Circuit
z PWM Converter With Reference
z Voltage Monitor
z Precision Current Limiter
DESCRIPSION
The TL431 is a three-terminal adjustable shunt regulator
with specified thermal stability over applicable
temperature V
REF
(Approx. 2.5V) and 40V with two
external resistors. This device has a typical dynamic
output impedance of 0.2. Active output circuitry provides
a very sharp turn-on characteristic, making this device
excellent replacement for zener diodes in many
applications. The TL431 is characterized for operation
from -40℃ to +125℃.
* Refer to the page 2 for detailed ordering Information,
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified)
CHARACTERISTIC SYMBOL MIN. MAX. UNIT
Cathode Voltage V
KA
- 42 V
Cathode Current Range(Continuous) I
K
-100 150 mA
Reference Input Current Range I
REF
0.05 10 mA
Junction Temperature Range T
J
0 150
℃
Storage Temperature Range T
STG
-60 150
℃
Operating Temperature Range T
OPR
-40 125
℃
T
O
P
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