The TL431 and TL432 devices are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5V) and 36V, with two external resistors. These devices have a typical output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as on-board regulation, adjustable power supplies, and switching power supplies. The TL432 device has exactly the same functionality and electrical specifications as the TL431 device, but has different pinouts for the DBV, DBZ, and PK packages.
Both the TL431 and TL432 devices are offered in three grades, with initial tolerances (at 25°C) of 0.5%, 1%, and 2%, for the B, A, and standard grade, respectively. In addition, low output drift versus temperature verifies good stability over the entire temperature range.
The TL43xxC devices are characterized for operation from 0°C to 70°C, the TL43xxI devices are characterized for operation from –40°C to 85°C, and the TL43xxQ devices are characterized for operation from –40°C to 125°C.
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | TL431, TL432 Precision Programmable Reference datasheet (Rev. S) | PDF | HTML | 2024/05/31 |
| E-book | Tips and tricks for designing with voltage references (Rev. A) | 2021/05/07 | ||
| Application note | Using the TL431 for Undervoltage and Overvoltage Detection (Rev. A) | 2019/12/11 | ||
| Selection guide | 431 Device Nomenclature (Rev. B) | 2019/09/18 | ||
| Application note | Designing With the Improved TL431LI (Rev. A) | 2019/06/28 | ||
| E-book | Voltage Supervisor and Reset ICs: Tips, Tricks and Basics | 2019/06/28 | ||
| Technical article | Designing for isolated DC/DC converter shunt safety | PDF | HTML | 2015/08/29 | |
| Application note | Understanding stability boundary conditions charts in TL431, TL432 Data sheet (Rev. A) | 2014/01/16 | ||
| Application note | Setting the shunt voltage on an adjustable shunt regulator | 2011/09/01 | ||
| More literature | SLL Precision Reference Product Clip | 2006/02/23 |
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The TL431CALC spreadsheet calculates all component parameters for any desired output voltage for the TL43x, TLV43x and TL1431. The spreadsheet includes limits for each device. Resistor values are calculated to the nearest 1% value.
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |
| SOT-23 (DBZ) | 3 | Ultra Librarian |
| SOT-89 (PK) | 3 | Ultra Librarian |