SMC431 TL431 TL431A Technical Data Data Sheet N1595 Rev. - Adjustable Precision Shunt Regulator Description: The SMC431, TL431A and TL431 are 3-terminal adjustable precision shunt regulators with guaranteed temperature stability over the applicable extended commercial temperature range. The output voltage may be set at any level greater than 2.495V (VREF) up to 30V merely by selecting two external resistors that act as a voltage divider network. These devices have a typical output impedance of 0.08Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent improved replacements for zener diodes in many applications. The precise ±0.5% reference voltage tolerance of the SMC431 makes it possible in many applications to avoid the use of a variable resistor, consequently saving cost and eliminating drift and reliability problems associated with it. Features: • • • • • • • • • Precision Reference Voltage. SMC431 : 2.495V ±0.5% TL431A : 2.495V ±1.0% TL431 : 2.495V ±1.6% Sink Current Capability: 200mA. Minimum Cathode Current for Regulation: 250μA. Equivalent Full-Range Temperature Coefficient: 50 ppm/℃. Fast Turn-On Response. Low Dynamic Output Impedance: 0.08Ω. Adjustable Output Voltage. Low Output Noise. Space Saving Packages: SOT-23 Applications: • • • • • • Linear Regulators. Adjustable Supplies. Switching Power Supplies. Battery Operated Computers. Instrumentation. Computer Disk Drivers. Typical application circuit: • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Adjustable Precision Shunt Regulator Technical Data Data Sheet N1595 Rev. - Ordering Information: PIN CONFIGURATION SMC431 -XXX SMC431- XXX TL431A - XXX SOT-23 TOP VIEW 1: VREF 2: CATHODE 3: ANODE PACKING TYPE TB: TUBE TR: TAPING & REEL TA: BAG PACKAGING TYPE F: SOT-23 Marking Diagram: Part No. Marking SMC431FTA TL431FTA TL431AFTA AC1SG AC2SG AC3SG Absolute Maximum Ratings: Cathode Voltage.........…………………………………………………………………………………….30V Continuous Cathode Current………………………......................………………..…… -10mA~250mA Reference Input Current Range…………………………………………...............………...............10mA Operating Temperature Range ...……………..……………………………………….… –40°C to 85°C Storage Temperature Range ……………………………………………………………..–65°C ~ 150°C Maximum Junction Temperature …………………………………………………………………..125°C Lead Temperature (Soldering) 10 sec. ……………………………………………………………260°C Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Technical Data Data Sheet N1595 Rev. - Adjustable Precision Shunt Regulator Test Circuit Fig. 1 Test Circuit for VZ=VREF Fig. 2 Test Circuit for VZ>VREF Fig. 3 Test Circuit for off-state Current • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Technical Data Data Sheet N1595 Rev. - Adjustable Precision Shunt Regulator Electrical Characteristics (TA=25°C, unless otherwise specified.) (Note 1) • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Technical Data Data Sheet N1595 Rev. - Adjustable Precision Shunt Regulator Typical Performance Characteristics • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Technical Data Data Sheet N1595 Rev. - Adjustable Precision Shunt Regulator • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Technical Data Data Sheet N1595 Rev. - Block Diagram Adjustable Precision Shunt Regulator Symbol Pin Descriptions CATHODE Pin - Sinks current with a range from 250μA to 200mA for normal applications. VREF Pin - Providing VREF=2.495V (typ.) for adjustable output voltage. ANODE Pin - Anode pin sources current for normal application. The current value is the same as Cathode pin. • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Technical Data Data Sheet N1595 Rev. - Adjustable Precision Shunt Regulator Application Examples • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Technical Data Data Sheet N1595 Rev. - Adjustable Precision Shunt Regulator Application Examples (Continued) • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Technical Data Data Sheet N1595 Rev. - Adjustable Precision Shunt Regulator Physical Dimensions SOT-23 (unit: mm) Note: 1. Refer to JEDEC MO-178. 2. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 10 mil per side. 3. Dimension "E1" does not include inter-lead flash or protrusions. 4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Technical Data Data Sheet N1595 Rev. - Adjustable Precision Shunt Regulator DISCLAIMER: 1- The information given herein, including the specifications and dimensions, is subject to change without prior notice to improve product characteristics. Before ordering, purchasers are advised to contact the SMC - Sangdest Microelectronics (Nanjing) Co., Ltd sales department for the latest version of the datasheet(s). 2- In cases where extremely high reliability is required (such as use in nuclear power control, aerospace and aviation, traffic equipment, medical equipment , and safety equipment) , safety should be ensured by using semiconductor devices that feature assured safety or by means of users’ fail-safe precautions or other arrangement . 3- In no event shall SMC - Sangdest Microelectronics (Nanjing) Co., Ltd be liable for any damages that may result from an accident or any other cause during operation of the user’s units according to the datasheet(s). SMC - Sangdest Microelectronics (Nanjing) Co., Ltd assumes no responsibility for any intellectual property claims or any other problems that may result from applications of information, products or circuits described in the datasheets. 4- In no event shall SMC - Sangdest Microelectronics (Nanjing) Co., Ltd be liable for any failure in a semiconductor device or any secondary damage resulting from use at a value exceeding the absolute maximum rating. 5- No license is granted by the datasheet(s) under any patents or other rights of any third party or SMC - Sangdest Microelectronics (Nanjing) Co., Ltd. 6- The datasheet(s) may not be reproduced or duplicated, in any form, in whole or part, without the expressed written permission of SMC - Sangdest Microelectronics (Nanjing) Co., Ltd. 7- The products (technologies) described in the datasheet(s) are not to be provided to any party whose purpose in their application will hinder maintenance of international peace and safety nor are they to be applied to that purpose by their direct purchasers or any third party. When exporting these products (technologies), the necessary procedures are to be taken in accordance with related laws and regulations.. • China - Germany - Korea - Singapore - United States • • http://www.smc-diodes.com - sales@ smc-diodes.com •