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Product details

Parameters

VO (V) 1.24 Reference voltage Adjustable Initial accuracy (Max) (%) 1 Rating Catalog VO adj (Min) (V) 1.24 VO adj (Max) (V) 6 Iz for regulation (Min) (uA) 55 Temp coeff (Max) (ppm/ degree C) 138 Operating temperature range (C) -40 to 125, -40 to 85, 0 to 70 Iout/Iz (Max) (mA) 15 open-in-new Find other Shunt voltage references

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 SOT-23 (DBV) 5 5 mm² 2.926 x 1.626 SOT-23 (DBZ) 3 7 mm² 2.92 x 2.37 SOT-89 (PK) 3 18 mm² 4.5 x 4.095 TO-92 (LP) 3 19 mm² 5.2 x 3.68 open-in-new Find other Shunt voltage references

Features

  • Low-Voltage Operation, VREF = 1.24 V
  • Adjustable Output Voltage, VO = VREF to 6 V
  • Reference Voltage Tolerances at 25°C
    • 0.5% for TLV431B
    • 1% for TLV431A
    • 1.5% for TLV431
  • Typical Temperature Drift
    • 4 mV (0°C to 70°C)
    • 6 mV (–40°C to 85°C)
    • 11 mV (–40°C to 125°C)
  • Low Operational Cathode Current, 80 µA Typical
  • 0.25-Ω Typical Output Impedance
  • Ultra-Small SC-70 Package Offers 40% Smaller Footprint Than SOT-23-3
  • See TLVH431 and TLVH432 for:
    • Wider VKA (1.24 V to 18 V) and IK (80 mA)
    • Additional SOT-89 Package
    • Multiple Pinouts for SOT-23-3 and SOT-89 Packages
  • On Products Compliant to MIL-PRF-38535,
    All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.

All trademarks are the property of their respective owners.

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Description

The TLV431 device is a low-voltage 3-terminal adjustable voltage reference with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between VREF (1.24 V) and 6 V with two external resistors (see the Parameter Measurement Information section). These devices operate from a lower voltage (1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLV431 device is an ideal voltage reference in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. These devices have a typical output impedance of 0.25 Ω. Active output circuitry provides a very sharp turnon characteristic, making them excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TLVH432A ACTIVE 1% low-voltage wide-operating current adjustable precision shunt regulator (reverse pinout) It offers a wider range for Vout (18V max) and Iz (80mA max), as well as different pinouts for SOT23-3 & SOT-89 packages.
Same functionality and pinout but is not an equivalent to the compared device:
TLVH431A ACTIVE 1% low-voltage wide-operating current adjustable precision shunt regulator It offers a wider range for Vout (18V max) and Iz (80mA max).

Technical documentation

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No results found. Please clear your search and try again. View all 4
Type Title Date
* Datasheet TLV431x Low-Voltage Adjustable Precision Shunt Regulator datasheet (Rev. X) May 01, 2018
More literature Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Selection guides Voltage Reference Overview Jul. 26, 2013
Application notes Supplying TPS61200 With a Single Solar Cell (Rev. B) Sep. 06, 2011

Design & development

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Hardware development

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Description

The DM38x Digital Video Evaluation Module (DVEVM) enables developers to start immediate evaluation of the DM38x Digital Media Processors and begin building digital video applications such as IP security cameras, action cameras, drones, video doorbells, car digital video recorders and other digital (...)

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Design tools & simulation

SIMULATION MODELS Download
SLIM005A.ZIP (161 KB) - PSpice Model
SIMULATION MODELS Download
SLVM088.ZIP (3 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLVM089.TSC (45 KB) - TINA-TI Reference Design
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SLVM090.TSC (80 KB) - TINA-TI Reference Design

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Design files
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The flyback topology with diode rectifier results in a low cost converter with reasonable size and efficiency.

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Active Clamp Forward Quarter Brick (18 to 60Vdc Input 3.3V/12A) Reference Design
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Class 2- Low Cost 3.3V/1.8A Flyback Converter for PoE Applications
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Design files
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5V, 4.8A High Efficiency Active Clamp Forward Converter for PoE Applications
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36Vdc-72Vdc Input, 1.2V/25A Active Clamp Forward
PMP6912 — This reference design generates a 1.2V/25A output from a standard 48V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate thresholds of the CSD16401Q5 and CSD16325Q5 allow these devices to be used as self-driven synchronous rectifiers for a highly (...)
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36VDC-75VDC Input, 3.3V/30A 1/8th Brick Active Clamp Forward
PMP4234 — This reference design generates an isolated 3.3V/10A output from a standard 48V telecom bus input. The UCC2897A is used to control an active clamp forward topology with self-driven synchronous rectifiers. The electrical components fit into the area of a standard 1/8th brick footprint. Peak (...)
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Low Cost Negative Input (-48V) Forward Converter (3.3V@15A) for PoE Powered Device (PD)
PMP7094 — This low cost Active Clamp Forward Converter shows best efficiency by easiest direct driven synchronuous rectifiers.
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Isolated Flyback that generates - 48 Vin, 20Vout at 3A
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Design files
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195VAC - 265VAC in, 4.5V@ 4.5A out
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Isolated discontinuous mode isolated flyback 3.3V @ 1.5A
PMP6516 — This compact and low-cost (5W) isolated flyback regulator produces a 3.3V output from a 48V input, such as Telecom. A full-load efficiency of 82% was achieved from a 48V nominal input.
Design files
REFERENCE DESIGNS Download
Flyback 5V@0.6A
PMP5192 — The PMP5192 reference design uses the UCC28600 green-mode controller to generate a 5V/2.5W output. The quasi-resonant switching of the UCC28600 allows this low-cost design to achieve efficiencies up to 80%, while the no load losses are less than 100mW.

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
SOT-23 (DBV) 5 View options
SOT-23 (DBZ) 3 View options
SOT-89 (PK) 3 View options
TO-92 (LP) 3 View options

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Videos

Voltage Reference Use Cases

Beyond the scope of signal chain conditioning, see other voltage reference use cases in this informative video.

Posted: 07-Jan-2018
Duration: 05:53

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