TL431A, B Series, NCV431A, B Series, SCV431A Programmable Precision References
The TL431A, B integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic IC voltage references operate as a low temperature coefficient zener which is programmable from Vref to 36 V with two external resistors. These devices exhibit a wide operating current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 W. The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5 V reference makes it convenient to obtain a stable reference from 5.0 V logic supplies, and since the TL431A, B operates as a shunt regulator, it can be used as either a positive or negative voltage reference.
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TO-92 (TO-226) LP SUFFIX CASE 29 1 2 3 Pin 1. Reference 2. Anode 3. Cathode 8 1 PDIP-8 P SUFFIX CASE 626 Programmable Output Voltage to 36 V Voltage Reference Tolerance: ±0.4%, Typ @ 25°C (TL431B) Low Dynamic Output Impedance, 0.22 W Typical Sink Current Capability of 1.0 mA to 100 mA Equivalent Full-Range Temperature Coefficient of 50 ppm/°C Typical Temperature Compensated for Operation over Full Rated Operating Temperature Range Low Output Noise Voltage NCV/SCV Prefixes for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC-Q100 Qualified and PPAP Capable These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant Micro8E DM SUFFIX CASE 846A Cathode 1 N/C 2 N/C 3 N/C 4 (Top View) 8 Reference 7 N/C 6 Anode 5 N/C 8 1 SOIC-8 D SUFFIX CASE 751 Cathode 1 Anode 2 3 N/C 4 (Top View) 8 7 6 5 Reference Anode N/C This is an internally modified SOIC-8 package. Pins 2, 3, 6 and 7 are electrically common to the die attach flag. This internal lead frame modification increases power dissipation capability when appropriately mounted on a printed circuit board. This modified package conforms to all external dimensions of the standard SOIC-8 package. ORDERING INFORMATION
See detailed ordering and shipping information on page 13 of this data sheet. DEVICE MARKING INFORMATION
See general marking information in the device marking section on page 14 of this data sheet. © Semiconductor Components Industries, LLC, 2014 1 September, 2014 - Rev. 36 Publication Order Number: TL431/D TL431A, B Series, NCV431A, B Series, SCV431A
Cathode (K) Reference (R) 800 Anode (A) Reference (R) 800 20 pF Cathode (K) Figure 1. Symbol
Reference (R) Cathode (K) 2.4 k 3.28 k 20 pF 7.2 k 150 4.0 k 1 …