Top

Product details

Parameters

VO (V) 2.5 Reference voltage Adjustable Initial accuracy (Max) (%) 0.5, 1 Rating Catalog VO adj (Min) (V) 2.5 VO adj (Max) (V) 36 Iz for regulation (Min) (uA) 80 Temp coeff (Max) (ppm/ degree C) 66 Operating temperature range (C) -40 to 125, -40 to 85 Iout/Iz (Max) (mA) 15 open-in-new Find other Shunt voltage references

Package | Pins | Size

SOT-23 (DBZ) 3 7 mm² 2.92 x 2.37 open-in-new Find other Shunt voltage references

Features

  • Reference voltage tolerance at 25°C
    • 0.5% (B Grade)
    • 1% (A Grade)
  • Minimum typical output voltage: 2.5 V
  • Adjustable output voltage: Vref to 36 V
  • Operation from −40°C to +125°C (Q temp)
  • Maximum temperature drift
    • 17 mV (I Temp)
    • 27 mV (Q Temp)
  • 0.3-Ω Typical output impedance
  • Sink-current capability
    • Imin = 0.08 mA (max)
    • IKA = 15 mA (max)
  • Reference input current IREF: 0.4 µA (max)
  • Deviation of reference input current over temperature, II(dev): 0.3 µA (max)
  • Packages: 1-mm x 1-mm X2SON or SOT23-3

All trademarks are the property of their respective owners.

open-in-new Find other Shunt voltage references

Description

The ATL43xLI device is a three-terminal adjustable shunt regulator, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.3 Ω. 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. This device is a pin-to-pin alternative to the TL431LI and TL432LI, with lower minimum operating current to help reduce system power consumption. The ATL432LI device has exactly the same functionality and electrical specifications as the ATL431LI device, but has a different pinout for the DBZ package. The ATL431LI is also offered in a tiny X2SON (1.00 mm x 1.00 mm) package which makes it ideal for space constraint applications.

The ATL431LI device is offered in two grades, with initial tolerances (at 25°C) of 0.5%, and 1%, for the B and A grade, respectively. In addition, low output drift versus temperature ensures good stability over the entire temperature range.

The ATL43xLIxQ devices are characterized for operation from –40°C to +125°C.

open-in-new Find other Shunt voltage references
Download

Technical documentation

= Featured
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet ATL431LI / ATL432LI High Bandwidth Low-Iq Programmable Shunt Regulator datasheet (Rev. D) Nov. 21, 2019
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
More literature Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Application notes Designing with the ATL431LI Nov. 27, 2018

Design & development

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

Design tools & simulation

SIMULATION MODELS Download
SLVMCW6.ZIP (2 KB) - PSpice Model
SIMULATION MODELS Download
SLVMCW7.ZIP (56 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
15-W, wide-input flyback reference design
PMP22144 — This reference design uses a UCC28742 flyback controller and an ATL432LI shunt reference to produce an isolated 24-V output capable of 0.625 A from an 85-V to 480-Vac input. All components are placed on one side of the board to reduce complexity and cost. The design can achieve 80% efficiency across (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
336-W Auxless AC/DC power supply reference design with 80 PLUS platinum compatible performance
PMP22087 — This reference design is an AC/DC power supply design with critical conduction mode (CRM) PFC and half-bridge LLC series resonant converter that provides 24 V, 240-W continuous, 336-W peak output from a universal input AC voltage (90 VAC to 264 VAC). This design uses UCC28056 CRM/DCM PFC controller (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Shunt Reference Considerations for Flyback Converters with Optocoupler Feedback

Learn how a lower Iref and Ildev can achieve higher output voltage accuracy. See how the new TL431LI is able to achieve these needs.

Posted: 31-Jan-2018
Duration: 07:37

Related videos