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TL432

ACTIVE

Adjustable precision shunt regulator (reverse pinout)

Product details

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
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
  • 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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Technical documentation

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Type Title Date
* Data sheet TL431, TL432 Precision Programmable Reference datasheet (Rev. R) PDF | HTML 20 Jul 2022
E-book Tips and tricks for designing with voltage references (Rev. A) 07 May 2021
Application note Using the TL431 for Undervoltage and Overvoltage Detection (Rev. A) 11 Dec 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
Technical article Designing for isolated DC/DC converter shunt safety PDF | HTML 29 Aug 2015
Application note Understanding stability boundary conditions charts in TL431, TL432 Data sheet (Rev. A) 16 Jan 2014
Application note Setting the shunt voltage on an adjustable shunt regulator 01 Sep 2011
More literature SLL Precision Reference Product Clip 23 Feb 2006

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

SPICE Model of TL431

SLOJ174.ZIP (0 KB) - Spice Model
Simulation model

TL431 Family Unencrypted PSpice Transient and AC Model (Rev. B)

SLVM071B.ZIP (130 KB) - PSpice Model
Simulation model

TL431x, TL432x TINA-TI AC Reference Design

SLVM165.TSC (65 KB) - TINA-TI Reference Design
Simulation model

TL431x, TL432x TINA-TI Transient & AC Spice Model

SLVM163.ZIP (4 KB) - TINA-TI Spice Model
Simulation model

TL431x, TL432x TINA-TI Transient Reference Design

SLVM164.TSC (82 KB) - TINA-TI Reference Design
Calculation tool

TL431CALC TL431 Design Calculator

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.

Supported products & hardware

Supported products & hardware

Products
Shunt voltage references
TL1431 Precision adjustable (programmable) shunt reference TL431 Adjustable precision shunt regulator TL432 Adjustable precision shunt regulator (reverse pinout) TLV431 1.5% accuracy, low-voltage, adjustable precision shunt regulator
Software
Calculation tool
TL431CALC TL431 component calculator
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Test report: PDF
Schematic: PDF
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PMP10737 — Reverse Polarity and Overvoltage Protection Reference Design for Automotive Systems

The PMP10737 is a reference design that provides protection from reverse polarity and overvoltage using discrete components. The Input voltage range is between 7V to 35V with OVP at 25V. The LM74610 is used for battery reverse protection, which utilizes a charge pump to drive an N-channel FET to (...)
Test report: PDF
Schematic: PDF
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PMP10202 — 56W Active Clamp for Telecom Apps Reference Design

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Schematic: PDF
Package Pins Download
SOT-23 (DBV) 5 View options
SOT-23 (DBZ) 3 View options
SOT-89 (PK) 3 View options

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