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Texas Instruments TLV431BQLPR — Analog & Data Acquisition

TLV431BQLPR Shunt Voltage Reference, ±0.5% Tolerance

MPNTLV431BQLPR
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Texas Instruments TLV431BQLPR, adjustable shunt voltage reference, ±0.5% tolerance, 1.24V to 6V output, 15 mA output, 100 µA cathode current, TO-92-3 package, -40°C to 125°C.

$0.4845Ref. price · indicative, final on quote
Texas Instruments TLV431BQLPR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TLV431BQLPR specifications
ParameterValue
Output typeAdjustable
MountingThrough Hole
Reference typeShunt
Voltage - output6 V
Voltage - output (Min (Fixed))1.24V
Output current15 mA
Current - cathode100 µA
Operating temperature-40°C~125°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±0.5%
CaseTO-226-3, TO-92-3 (TO-226AA) Formed Leads

Product details

Shunt reference with ±0.5% tolerance for precision feedback loops

Its key differentiator from the standard TL431 is the ±0.5% reference tolerance, which tightens the output voltage window in an isolated power supply or a linear regulator feedback divider.

Cathode current and output drive — sizing the bias resistor

The shunt requires a minimum cathode current of 100 µA to maintain regulation — below that the reference output drifts outside the ±0.5% window. The 15 mA output current rating sets the maximum sink capability through the cathode, which is the limit for driving an optocoupler LED in a feedback loop or for pulling down the feedback node in a series regulator.

Temperature grade and package — board-level fit

The TO-92-3 package (TO-226AA) is a through-hole form factor with formed leads, intended for manual assembly or wave-solder processes.

Frequently asked questions

What is the tolerance of TLV431BQLPR?

The reference tolerance is ±0.5%, which is tighter than the standard TL431's typical 1% or 2% grades. This makes it suitable for applications requiring a tighter output voltage window, such as precision power supplies or data converters.

How does TLV431BQLPR compare to TL431?

The TLV431BQLPR is a lower-voltage variant of the TL431 family — its maximum output voltage is 6 V compared to the TL431's 36 V. The ±0.5% tolerance is tighter than the standard TL431's 1% or 2% grades. The pinout and basic shunt-reference function are the same, but the TLV431 is designed for lower-voltage rails.

What is the typical application of TLV431BQLPR?

This shunt reference is used as a precision voltage reference in isolated switch-mode power supplies, linear regulators, and monitoring circuits. The adjustable output and tight tolerance suit it for feedback loops in AC-DC converters, battery chargers, and industrial power modules.