NOT RECOMMENDED FOR NEW DESIGN USE AS431/AS431H FAMILY
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Description
T...
NOT RECOMMENDED FOR NEW DESIGN USE AS431/AS431H FAMILY
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Description
The TL431 and TL432 are three terminal adjustable shunt regulators offering excellent temperature stability and output current handling capability up to 100mA. The output
voltage may be set to any chosen
voltage between 2.5 and 36 volts by selection of two external divider resistors. The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. Diodes’ TL431 has the same electrical specifications as the industry standard ‘431 and is available in 2 grades with initial tolerances of 1% and 0.5% for the A and B grades respectively.
Features
Temperature range -40 to +125ºC Reference
Voltage Tolerance at 25°C
TL431A: 2.495V ± 1.0% TL431B: 2.495V ± 0.5% Low Output Noise 0.2Ω Typical Output Impedance Sink Current Capability: 1mA to 100mA Adjustable Output
Voltage: VREF to 36V All devices are: Totally Lead-Free & Fully RoHS compliant
(Notes 1 & 2) Halogen and Antimony Free. “Green” Device
(Note 3)
Pin Assignments TL431
(Top View)
CATHODE 1
3 ANODE
REF 2
SOT23
(Top View)
NC
Leave floating or connect to pin 5
2
5 ANODE
CATHODE 3
4 REF
SOT25
(Top View)
CATHODE 1 ANODE 2 ANODE 3 NC 4
SO-8
8 REF 7 ANODE 6 ANODE 5 NC
Applications
Opto-Coupler Linearisers Shunt Regulators Improved Zener Variable Reference
TL432
(Top View)
REF 1 CATHODE 2
3 ANODE
SOT23
Notes:
...