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TL431

Diodes
Part Number TL431
Manufacturer Diodes
Description ADJUSTABLE PRECISION SHUNT REGULATOR
Published Aug 2, 2016
Detailed Description NOT RECOMMENDED FOR NEW DESIGN USE AS431/AS431H FAMILY TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Description T...
Datasheet PDF File TL431 PDF File

TL431
TL431

Overview
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: 1.
No purposely added lead.
Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2.
See http://www.
diodes.
com/quality/lead_free.
html for more information about Diodes Incorporated’s definitions of Halogen and Antimony free, "Green" and Lead-Free.
3.
Halogen and Antimony free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
TL431/TL432 Document number: DS35050 Rev.
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