SMC431 SMC | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 11

Technical content

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Description: The SMC431, TL431A and TL431 are 3-terminal adjustable precision shunt regulators with guaranteed temperature stability over the a pplicable extended comme rcial 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 0.08 Ω. 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:

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Ordering Information: SMC431 -XXX SMC431- XXX TL431A - XXX Marking Diagram: Absolute Maximum Ratings: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. PIN CONFIGURATION SOT-23 TOP VIEW 1: VREF CATHODE 3: ANODE Part No. Marking SMC431FTA AC1SG TL431FTA AC2SG TL431AFTA AC3SG PACKING TYPE TB: TUBE TR: TAPING & REEL TA: BAG PACKAGING TYPE F: SOT-23

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Test Circuit Fig. 1 Test Circuit for VZ=VREF Fig. 2 Test Circuit for VZ>VREF Fig. 3 Test Circuit for off-state Current

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Electrical Characteristics (TA=25°C, unless otherwise specified.) (Note 1)

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Typical Performance Characteristics

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Block Diagram 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.

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Application Examples

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A Application Examples (Continued)

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A 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.

Technical Data Adjustable Precision Shunt Regulator Data Sheet N1595 Rev. -

  • China - Germany - Korea - Singapore - United States •
  • http://www.smc-diodes.com - sales@ smc-diodes.com • SMC431 TL431 TL431A 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..