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Product details

Parameters

VO (V) 1.24 Reference voltage Adjustable Initial accuracy (Max) (%) 0.5 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

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 SOT-SC70 (DCK) 6 4 mm² 2 x 2.1 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.

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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:
TLVH432B ACTIVE 0.5% 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:
TLVH431B ACTIVE 0.5% 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

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

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
SIMULATION MODELS Download
SLVM090.TSC (80 KB) - TINA-TI Reference Design

Reference designs

REFERENCE DESIGNS Download
Low Side, High Bandwidth Current Amp and Fault Detection for Solar Inverters Reference Design
TIDA-01598 — This reference design provides a solution for an accurate shunt-based current measurement on the low side with an integrated fault-detection feature. It consists of a current sense amplifier which supports current sensing for a high bandwidth. The fault detection feature allows detection of (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
36W Industrial PoE Isolated Flyback Reference Design
PMP20692 — PMP20692 is an isolated flyback converter utilizing the LM5022 for industrial applications. This design accepts PoE input voltage of 54V ± 10%. The test report here is 54V in ± 10%, 12V out @ 3A of load current.  Switching frequency is set to 250kHz. A custom transformer is used (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SC70 (DCK) 6 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

Ordering & quality

Support & training

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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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