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Product details

Parameters

VO (V) 1.24 Reference voltage Adjustable Initial accuracy (Max) (%) 1.5 Rating Catalog VO adj (Min) (V) 1.24 VO adj (Max) (V) 18 Iz for regulation (Min) (uA) 60 Temp coeff (Max) (ppm/ degree C) 138 Operating temperature range (C) -40 to 85, -40 to 125, 0 to 70 Iout/Iz (Max) (mA) 80 open-in-new Find other Shunt voltage references

Package | Pins | Size

SOT-23 (DBZ) 3 7 mm² 2.92 x 2.37 SOT-89 (PK) 3 18 mm² 4.5 x 4.095 open-in-new Find other Shunt voltage references
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Same functionality and pinout but is not an equivalent to the compared device:
TL432LI ACTIVE Adjustable precision shunt regulator with optimized reference current (pin layout: RKA) TL432LI offers lower 63 ppm/°C temperature drift and higher initial accuracy at 2.4 V0.

Technical documentation

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Type Title Date
* Datasheet TLVH431, TLVH432 Low-Voltage Adjustable Precision Shunt Regulators datasheet (Rev. L) Apr. 14, 2020
Application notes Using the TL431 for Undervoltage and Overvoltage Detection (Rev. A) Dec. 11, 2019
Selection guides 431 Device Nomenclature (Rev. B) Sep. 18, 2019
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Application notes Setting the shunt voltage on an adjustable shunt regulator Sep. 01, 2011
More literature SLL Precision Reference Product Clip Feb. 23, 2006

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
10
Description

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 (...)

Features
  • Adjustable regulated output from 2.5 V to 36 V 
  • Very-low operating current: IKA(min) = 35 µA (max) and IREF = 150 nA (max)
  • Extended cathode current range from 35 µA to 100 mA
  • Low output impedance of 0.3 Ω (max)
  • Small form factor
  • Ease of use
  • Multiple gain setting options
  • Stability test availability

Design tools & simulation

SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
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
  • (...)

Reference designs

REFERENCE DESIGNS Download
65W (130W Surge) Flyback Power Supply for Laptop Adapter Apps w/85-265VAC Input Reference Design
PMP9208 The PMP9208 is a power adapter reference design for 19.5V output, constant voltage / constant current, 65W flyback power supply with 130W surge capability. Primary side regulation eliminates feedback opto-coupler and provides 1% regulation down to no-load. Average efficiency of > 89% and no load (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23 (DBZ) 3 View options
SOT-89 (PK) 3 View options

Ordering & quality

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