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TLA431

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TLA431

AKTIV
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Produktdetails

Rating Catalog VO (V) 2.495 Initial accuracy (max) (%) 0.5, 1, 2 Iz for regulation (min) (µA) 200 VO adj (min) (V) 2.495 VO adj (max) (V) 36 Reference voltage (V) Adjustable, adjustable Temp coeff (max) (ppm/°C) 48 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 100
Rating Catalog VO (V) 2.495 Initial accuracy (max) (%) 0.5, 1, 2 Iz for regulation (min) (µA) 200 VO adj (min) (V) 2.495 VO adj (max) (V) 36 Reference voltage (V) Adjustable, adjustable Temp coeff (max) (ppm/°C) 48 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 100
SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37 SOT-5X3 (DRL) 6 2.56 mm² 1.6 x 1.6
  • No output capacitor required
  • Stable with all capacitive loads
  • Reference voltage tolerance at 25°C
    • 1% (A grade)
  • Adjustable output voltage: Vref to 36V
  • Operation from −40°C to 125°C
  • Typical temperature drift (TLA43xA)
    • 8mV (I temperature)
    • 11mV (Q temperature)
  • Low output noise
  • Typical output impedance: 0.2Ω
  • Sink-current capability: 0.2mA to 100mA
  • Pin-compatible with industry-standard TL431 and TL432
  • Available in ultra-small DRL package
  • No output capacitor required
  • Stable with all capacitive loads
  • Reference voltage tolerance at 25°C
    • 1% (A grade)
  • Adjustable output voltage: Vref to 36V
  • Operation from −40°C to 125°C
  • Typical temperature drift (TLA43xA)
    • 8mV (I temperature)
    • 11mV (Q temperature)
  • Low output noise
  • Typical output impedance: 0.2Ω
  • Sink-current capability: 0.2mA to 100mA
  • Pin-compatible with industry-standard TL431 and TL432
  • Available in ultra-small DRL package

The TLA431 and TLA432 devices are three-terminal adjustable shunt regulators that are stable with all capacitor loads. The devices are pin compatible with the industry standard TL431 and TL432 but with improved stability to support all capacitor loads. The output cathode voltage can be set to any value between Vref (2.495V) 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 onboard regulation, adjustable power supplies, and switching power supplies. The TLA431 also functions as a comparator for undervoltage monitoring. The internal amplifier and reference of the TLA431 is used an error amplifier in isolated optocoupler flyback power supplies. The TLA432 device has exactly the same functionality and electrical specifications as the TLA431 device.

The TLA431 and TLA432 devices are specified in two temperature grades, I and Q. In addition, the devices offer good stability reference voltage over the entire temperature range.

The TLA431 and TLA432 devices are three-terminal adjustable shunt regulators that are stable with all capacitor loads. The devices are pin compatible with the industry standard TL431 and TL432 but with improved stability to support all capacitor loads. The output cathode voltage can be set to any value between Vref (2.495V) 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 onboard regulation, adjustable power supplies, and switching power supplies. The TLA431 also functions as a comparator for undervoltage monitoring. The internal amplifier and reference of the TLA431 is used an error amplifier in isolated optocoupler flyback power supplies. The TLA432 device has exactly the same functionality and electrical specifications as the TLA431 device.

The TLA431 and TLA432 devices are specified in two temperature grades, I and Q. In addition, the devices offer good stability reference voltage over the entire temperature range.
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Technische Dokumentation

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* Data sheet TLA431, TLA432 All-Capacitor Stable Precision Programmable Reference datasheet (Rev. C) PDF | HTML 16 Dez 2025
Certificate TLA431EVM EU Declaration of Conformity (DoC) 08 Sep 2025

Design und Entwicklung

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Evaluierungsplatine

ATL431EVM-001 — ATL431 einstellbarer Shunt-Regler – Evaluierungsmodul

The ATL431EVM-001 evaluation module (EVM) features the functionality and adjustability of the ATL431 by letting you program the cathode voltage with various resistor values. You can also set the cathode current using the various resistors in series with the supply. (...)

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Berechnungstool

SHUNT-REFERENCE-CALC — Shunt Reference Selector and Design Calculator

This tool guides the user through the design process for the TLx431 and LM40x0 family of shunt voltage references. This calculator will recommend resistance and capacitance values to optimally meet the user's desired specifications.
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PSpice® für TI ist eine Design- und Simulationsumgebung, welche Sie dabei unterstützt, die Funktionalität analoger Schaltungen zu evaluieren. Diese Design- und Simulationssuite mit vollem Funktionsumfang verwendet eine analoge Analyse-Engine von Cadence®. PSpice für TI ist kostenlos erhältlich und (...)
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