TL431B Datasheet, PDF (1/6 Pages) Texas Instruments – ADJUSTABLE PRECISION SHUNT REGULATORS

TL431B
SOT-23 Encapsulate Adjustable Reference Source
Device Descripsion
The TL431B is a three-terminal adjustable shunt regulators with
a specified thermal stability. The output voltage may be set to any value
between Vref (approx. 2.5V) and 36V with two external resistors. The a-
ctive output circuitry provides a very sharp turn on characteristic making
these devices an excellent replacement for zener diodes in many applic-
ations.
FEATURES
z On-wafer Vref trimming ± 0.3%
z 95% chips after packaging have Vrefaccuracy ±0.5%
z Low Dynamic output impedance 0.1Ω (Typ)
z Adjustable output voltage
z Fast turn-on response
z Sink current capability of 0.1mA to 100mA
z Low output noise
z Industrial temperature range
z Improved temperature compensation
z Excellent temperature coefficient 25ppm /°C
z Electrostatic discharge voltage 2.5kV
Applications
z Shunt Regulator
z High-Current Shunt Regulator
z Precision Current Limiter
SOT- 23
3
1. REFERENCE
2. CATHODE
3. ANODE
2
1
Marking: 431
Limiting Values (Absolute Maximum Rating)
Parameter
Cathode Voltage
Cathode Current Range (Continuous)
Reference lnput Current Range
Power Dissipation
Thermal Resistance from Junction
to Ambient
Operating Junction Temperature
Operating Ambient Temperature Range
Lead Temperature
(1.6mm aside from the case, 10 seconds)
Storage temperature Range
ESD (HB M)
Symbol
V_KA
I_KA
Iref
P_D
R_θJA
Tj
Topr
T Lead
Tstg
VESD
Value
40
-100~+150
0.05~+10
300
417
150
-40~+125
260
-65~+150
2.5
Unit
V
mA
mA
mW
℃/W
℃
℃
℃
℃
kV
High Diode Semiconductor
1