TL431A [SMC]
Fast Turn-On Response;
| 型号： | TL431A |
| 厂家： | 
Sangdest Microelectronic (Nanjing) Co., Ltd |
| 描述： | Fast Turn-On Response |
| 文件： | 总11页 (文件大小：380K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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:
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SMC431
TL431
TL431A
Technical Data
Data Sheet N1595 Rev. -
Adjustable Precision Shunt Regulator
Ordering Information:
PIN CONFIGURATION
SOT-23
SMC431 -XXX
SMC431- XXX
TL431A - XXX
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.
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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
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SMC431
TL431
TL431A
Technical Data
Data Sheet N1595 Rev. -
Adjustable Precision Shunt Regulator
Electrical Characteristics (TA=25°C, unless otherwise specified.) (Note 1)
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SMC431
TL431
TL431A
Technical Data
Data Sheet N1595 Rev. -
Adjustable Precision Shunt Regulator
Typical Performance Characteristics
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SMC431
TL431
TL431A
Technical Data
Data Sheet N1595 Rev. -
Adjustable Precision Shunt Regulator
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SMC431
TL431
TL431A
Technical Data
Data Sheet N1595 Rev. -
Adjustable Precision Shunt Regulator
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.
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SMC431
TL431
TL431A
Technical Data
Data Sheet N1595 Rev. -
Adjustable Precision Shunt Regulator
Application Examples
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SMC431
TL431
TL431A
Technical Data
Data Sheet N1595 Rev. -
Adjustable Precision Shunt Regulator
Application Examples (Continued)
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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.
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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..
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