TL431
Adjustable Precision Shunt Regulator
•
Programmable Output Voltage to 36V
TO-92
Pin Configuration
•
Low Dynamic Output Impedance 0.2Ω
TL431CLP
•
Sink Current Capability of 0.1 mA to 100 mA
CATHODE
o
•
Equivalent Full-Range Temperature Coefficient of 50 ppm/ C
ANODE
R
REF
•
Temperature Compensated for Operation over Full Rated
A
C
Operating Temperature Range
SOT—23
—
•
Low Output Noise Voltage
SOT-89
TL431LT1
•
Fast Turn on Response
TL431CPK
1. REF
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 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
TL431
is characterized for operation from 0
o
C to +70
o
C.
REF
ANODE
CATHODE
2. CATHODE
3. ANODE
SYMBOL
C a t ode
h
(K)
Re fe r n c e
e
(R )
Re fe r n c e
e
(R )
FUNCTIONAL BLOCK DIAGRAM
C a t ode
h
(K)
+
-
Anod e
(A )
2 .5 V
re f
A n o d e (A )
SCHEMATIC DIAGRAM
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage:
http://www.wingshing.com
Tel:(852)2341 9276 Fax:(852)2797 8153
E-mail: wsccltd@hkstar.com
4-1
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