Datasheet TL431, TL432 (Diodes)

TL431/TL432 ADJUSTABLE PRECISION SHUNT REGULATOR Description Pin Assignments
The TL431 and TL432 are three terminal adjustable shunt
TL431
regulators offering excellent temperature stability and output (Top View) current handling capability up to 100mA. The output voltage may be set to any chosen voltage between 2.5 and 36 volts CATHODE 1 by selection of two external divider resistors. 3 ANODE The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener REF 2 performance. Diodes’ TL431 has the same electrical specifications as the industry standard ‘431 and is available SOT23

in 2 grades with initial tolerances of 1% and 0.5% for the

(Top View) A and B grades respectively. NC 5 ANODE
Features
Leave floating or 2 • Temperature range -40 to +125ºC connect to pin 5 • Reference Voltage Tolerance at 25°C CATHODE 3 4 REF • TL431A: 2.495V ± 1.0% • SOT25 TL431B: 2.495V ± 0.5%

•

Low Output Noise (Top View) • 0.2Ω Typical Output Impedance • Sink Current Capability: 1mA to 100mA CATHODE 1 8 REF • Adjustable Output Voltage: VREF to 36V ANODE 2 7 ANODE • All devices are: ANODE 3 6 ANODE • Totally Lead-Free & Fully RoHS compliant NC 4 5 NC (Notes 1 & 2) • SO-8 Halogen and Antimony Free. “Green” Device

(Note 3) SO-8 is a future product
TL432 Applications
• (Top View) Opto-Coupler Linearisers • Shunt Regulators • REF 1 Improved Zener • Variable Reference 3 ANODE CATHODE 2 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 *SO-8 is a future package 1 of 14 April 2012 Document number: DS35044 Rev. 6 - 2
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