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Product details

Parameters

VO (V) 2.5 Reference voltage Adjustable Initial accuracy (Max) (%) 0.4 Rating Automotive, Catalog VO adj (Min) (V) 2.5 VO adj (Max) (V) 36 Iz for regulation (Min) (uA) 450 Temp coeff (Max) (ppm/ degree C) 114 Operating temperature range (C) -40 to 125, 0 to 70 Iout/Iz (Max) (mA) 150 open-in-new Find other Shunt voltage references

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 SOIC (D) 8 19 mm² 3.91 x 4.9 TO-92 (LP) 3 19 mm² 5.2 x 3.68 TSSOP (PW) 8 19 mm² 3 x 6.4 open-in-new Find other Shunt voltage references

Features

  • 0.4% Initial Voltage Tolerance
  • 0.2-Ω Typical Output Impedance
  • Fast Turnon (500 ns)
  • Sink Current Capability (1 mA to 100 mA)
  • Low Reference Current (REF)
  • Adjustable Output Voltage (VI(ref) to 36 V)
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Description

The TL1431 device is a precision programmable reference with specified thermal stability over automotive, commercial, and military temperature ranges. The output voltage can be set to any value between VI(ref) (approximately 2.5 V) and 36 V with two external resistors. This device has a typical output impedance of 0.2 Ω. Active output circuitry provides a sharp turnon characteristic, making the device an excellent replacement for Zener diodes and other types of references in applications such as onboard regulation, adjustable power supplies, and switching power supplies.

The TL1431C is characterized for operation over the commercial temperature range of 0°C to 70°C. The TL1431Q is characterized for operation over the full automotive temperature range of –40°C to 125°C. The TL1431M is characterized for operation over the full military temperature range of –55°C to 125°C.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TL1431 Precision Programmable Reference datasheet (Rev. N) Oct. 04, 2016
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Selection guide TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Application note Setting the shunt voltage on an adjustable shunt regulator Sep. 01, 2011

Design & development

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Design tools & simulation

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PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
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CALCULATION TOOL Download
TL431 component calculator
TL431CALC 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.

Reference designs

REFERENCE DESIGNS Download
Laser and Ionization Unit
PMP2534 — The PMP2534 is composed of two times active clamp forward, delivering 0…35V@10Amax, two current limit functions to protect the 3.3V and 5V outputs and some interface for a microcntroller. The active clamps are constant voltage and/or constant current controllable by means of two PWM inputs. This (...)
Design files

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
TO-92 (LP) 3 View options
TSSOP (PW) 8 View options

Ordering & quality

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