PROGRAMMABLE PRECISION SHUNT REGULATOR TL431/A/C
FEATURES
z Programmable Output Voltage to 40V
TO-92 PKG
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/℃
3
2
1
T
O
P
z Temperature Compensated For Operation Over
Full Rate Operating Temperature Range
z Low Output Noise Voltage
SOT-23 PKG
z Fast Turn-on Response
2
z TO-92, SOT-89 or SOT-23 3L Package
TOP
APPLICATION
1
3
z Shunt Regulator
z Precision High-Current Series Regulator
z High-Current Shunt Regulator
z Crowbar Circuit
SOT-89 PKG
z PWM Converter With Reference
z Voltage Monitor
TOP
z Precision Current Limiter
1
2
3
DESCRIPSION
The TL431 is a three-terminal adjustable shunt regulator
with specified thermal stability over applicable
temperature VREF (Approx. 2.5V) and 40V with two
external resistors. This device has a typical dynamic
output impedance of 0.2Ω. 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℃.
PIN 1. Reference 2. Anode
3. Cathode
ORDERING INFORMATION
Device
Package
TL431
TO-92(Bulk)
TO-92(Taping)
TL431TA
TL431SF
TL431F
SOT-23 3L
SOT-89 3L
* 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
VKA
IK
-
42
150
10
V
mA
mA
℃
Cathode Current Range(Continuous)
Reference Input Current Range
Junction Temperature Range
Operating Temperature Range
Storage Temperature Range
-100
-0.05
-40
IREF
TJ
150
125
150
TOPR
TSTG
-40
℃
-65
℃
Dec. 2010 – Rev.1.5
- 1 -
HTC