TL431 Datasheet, PDF (1/4 Pages) Motorola, Inc – PROGRAMMABLE PRECISION REFERENCES

TL431
Adjustable Precision Shunt Regulator
• Programmable Output Voltage to 36V
Pin Configuration
TO-92
• Low Dynamic Output Impedance 0.2Ω
TL431CLP
• Sink Current Capability of 0.1 mA to 100 mA
• Equivalent Full-Range Temperature Coefficient of 50 ppm/^oC
• Temperature Compensated for Operation over Full Rated
Operating Temperature Range
• Low Output Noise Voltage
• Fast Turn on Response
SOT-89
TL431CPK
CATHODE
R
A_C
SOT—23
ANODE
REF
TL431LT1
1. REF
2. CATHODE
DESCRIPTION
REF ^{ANODE CATHODE}
3. ANODE
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^oC to +70^oC.
SYMBOL
C a th o d e
(K )
Re fe re n c e
(R )
Anod e
(A )
FUNCTIONAL BLOCK DIAGRAM
Re fe re n c e
(R )
+
-
C a th o d e
(K )
2 .5 V re f
A n o d e (A )
SCHEMATIC DIAGRAM
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