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TL431

AKTIV

Einstellbarer Präzisions-Shunt-Regler

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Datenblatt

TL431

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

VO (V) 2.495 Initial accuracy (max) (%) 0.5, 1, 2 VO adj (min) (V) 2.495 VO adj (max) (V) 36 Iz for regulation (min) (µA) 400 Reference voltage (V) adjustable Rating Catalog Temp coeff (max) (ppm/°C) 92 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 100
VO (V) 2.495 Initial accuracy (max) (%) 0.5, 1, 2 VO adj (min) (V) 2.495 VO adj (max) (V) 36 Iz for regulation (min) (µA) 400 Reference voltage (V) adjustable Rating Catalog Temp coeff (max) (ppm/°C) 92 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 100
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6 SOP (PS) 8 48.36 mm² 6.2 x 7.8 SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8 SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37 SOT-89 (PK) 3 18.4275 mm² 4.5 x 4.095 SOT-SC70 (DCK) 6 4.2 mm² 2 x 2.1 TO-92 (LP) 3 19.136 mm² 5.2 x 3.68 TSSOP (PW) 8 19.2 mm² 3 x 6.4
  • Reference voltage tolerance at 25°C
    • 0.5% (B grade)
    • 1% (A grade)
    • 2% (Standard grade)
  • Adjustable output voltage: V ref to 36 V
  • Operation from −40°C to 125°C
  • Typical temperature drift (TL43xB)
    • 6 mV (C temp)
    • 14 mV (I temp, Q temp)
  • Low Output Noise
  • 0.2-Ω Typical output impedance
  • Sink-current capability: 1 mA to 100 mA
  • Reference voltage tolerance at 25°C
    • 0.5% (B grade)
    • 1% (A grade)
    • 2% (Standard grade)
  • Adjustable output voltage: V ref to 36 V
  • Operation from −40°C to 125°C
  • Typical temperature drift (TL43xB)
    • 6 mV (C temp)
    • 14 mV (I temp, Q temp)
  • Low Output Noise
  • 0.2-Ω Typical output impedance
  • Sink-current capability: 1 mA to 100 mA

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 V ref (approximately 2.5 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.2 Ω. 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 ensures 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.

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 V ref (approximately 2.5 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.2 Ω. 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 ensures 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.
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Technische Dokumentation

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Typ Titel Datum
* Data sheet TL431, TL432 Precision Programmable Reference datasheet (Rev. R) PDF | HTML 20 Jul 2022
Technical article Make sure your optocoupler is properly biased PDF | HTML 16 Feb 2024
Application note Optimization of a Shunt Reference for Flyback Converters PDF | HTML 18 Okt 2023
Application note Designing Stable Isolated Power Supplies with Shunt Regulators PDF | HTML 29 Dez 2022
E-book Tips and tricks for designing with voltage references (Rev. A) 07 Mai 2021
Analog Design Journal High-power, low-cost, discrete linear pre-regulator for automotive rear lights 21 Dez 2020
Technical article Overcoming common design challenges in an UV sterilization box system PDF | HTML 27 Jul 2020
Technical article How modern voltage references help shrink small designs PDF | HTML 01 Jun 2020
Application note Using the TL431 for Undervoltage and Overvoltage Detection (Rev. A) 11 Dez 2019
Selection guide 431 Device Nomenclature (Rev. B) 18 Sep 2019
Application note Designing With the Improved TL431LI (Rev. A) 28 Jun 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
White paper Voltage reference selection basics white paper (Rev. A) 23 Okt 2018
Application note TL431 Pin FMEA 12 Jan 2018
Application note Low Cost Bidirectional Current Sensing Using INA181 28 Jul 2017
Technical article Differences between PSR and SSR in bias power-supply design PDF | HTML 08 Apr 2016
Technical article The great compromise: voltage references PDF | HTML 07 Dez 2015
Technical article Designing for isolated DC/DC converter shunt safety PDF | HTML 29 Aug 2015
Technical article Can overcurrent protection be simple and precise, while minimizing cost? PDF | HTML 31 Jul 2015
Technical article How to get no-load power savings in AC to DC supplies PDF | HTML 08 Jun 2015
Application note Designing Overcurrent protection for TPL7407L Peripheral Driver 05 Nov 2014
Analog Design Journal Low-cost flyback solutions for 10-mW standby power 22 Jan 2014
Application note Understanding stability boundary conditions charts in TL431, TL432 Data sheet (Rev. A) 16 Jan 2014
Application note Lead-Acid Charger and LED Driver using TPS5402 (Rev. A) 13 Jun 2013
User guide 200-VA HF Inverter Design Based on UCD8220 and MSP430G2330 for Automotive Applications 07 Mär 2013
Application note Compensation Design with TL431 for UCC28600 16 Jan 2013
Application note Setting the shunt voltage on an adjustable shunt regulator 01 Sep 2011
User guide A 90-W High-Efficiency, LLC Series-Resonant Converter 03 Nov 2010
Analog Design Journal Q1 2009 Issue Analog Applications Journal 11 Mär 2009
Analog Design Journal Using a portable-power boost converter in an isolated flyback application 11 Mär 2009
Application note Designing Switching Voltage Regulators With the TL494 (Rev. E) 26 Jul 2005

Design und Entwicklung

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Evaluierungsplatine

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Berechnungstool

TL431CALC — TL431 Design Calculator

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