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Texas Instruments TLV431AIDBZR — Analog & Data Acquisition

TLV431AIDBZR Shunt Reference, ±1%, SOT-23-3, Active

MPNTLV431AIDBZR
Active

Texas Instruments TLV431AIDBZR adjustable shunt voltage reference, ±1% tolerance, 1.24V to 6V output, 15 mA output, 80 µA cathode current, SOT-23-3, -40°C to 85°C.

$0.7600Ref. price · indicative, final on quote
Texas Instruments TLV431AIDBZR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TLV431AIDBZR specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output6 V
Voltage - output (Min (Fixed))1.24V
Output current15 mA
Current - cathode80 µA
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±1%
CaseTO-236-3, SC-59, SOT-23-3

Product details

Adjustable shunt reference in SOT-23-3

It is the low-voltage sibling of the industry-standard TL431, operating with a minimum cathode current of 80 µA — roughly one-tenth the TL431's requirement — which makes it suitable for battery-powered and low-quiescent bias circuits. The ±1% tolerance on the reference voltage suits precision power-supply feedback loops, voltage monitors, and isolated secondary-side regulation in telecom and industrial power converters.

Output current and cathode current limits

The shunt can sink up to 15 mA of continuous cathode current. This sets the upper bound for the series resistor value in a given supply rail — for a 5 V rail with a 1.24 V reference, the resistor must drop 3.76 V at 15 mA, so the minimum resistor is 250 Ω. The 80 µA minimum cathode current ensures the device stays in its linear region even at light load; below that threshold the reference voltage drifts outside the ±1% window.

The SOT-23-3 package (TO-236-3 / SC-59 compatible) occupies minimal board area and is a direct footprint match for the TL431 in the same package, easing a drop-in swap where the lower cathode current is needed.

Frequently asked questions

Is TLV431AIDBZR equivalent to TL431?

The TLV431 is the low-voltage, low-cathode-current variant of the TL431. Both are adjustable shunt references, but the TLV431 operates from 1.24 V (vs the TL431's 2.5 V) and requires only 80 µA minimum cathode current (vs the TL431's ~1 mA). The pinout is the same in the SOT-23-3 package, so it can replace a TL431 in circuits where the lower reference voltage and lower bias current are acceptable.