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Texas Instruments TL432BIDBZR — Analog & Data Acquisition

TL432BIDBZR shunt voltage reference, ±0.5% tolerance

MPNTL432BIDBZR
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Texas Instruments TL432BIDBZR, adjustable shunt voltage reference, ±0.5% tolerance, 100 mA output, 700 µA cathode current, SOT-23-3 package, -40°C to 85°C.

$0.5100Ref. price · indicative, final on quote
Texas Instruments TL432BIDBZR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TL432BIDBZR specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output36 V
Voltage - output (Min (Fixed))2.495V
Output current100 mA
Current - cathode700 µA
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±0.5%
CaseTO-236-3, SC-59, SOT-23-3

Product details

SOT-23-3 shunt reference with ±0.5% tolerance

It is the precision sibling of the industry-standard TL431, offering a tighter ±0.5% tolerance on the internal 2.495 V reference voltage. Output voltage is set with two external resistors and can be adjusted up to 36 V. The part sinks up to 100 mA and requires a minimum cathode current of 700 µA to maintain regulation.

The 100 mA output current is enough to drive an optocoupler LED in a feedback loop, bias a small-signal transistor, or supply a low-power load. The 700 µA cathode current sets the floor for the biasing resistor from the supply rail — a higher value resistor saves quiescent power but must still deliver at least 700 µA to keep the reference in regulation. The ±0.5% tolerance means the reference voltage at 25°C stays within 2.483 V to 2.507 V — tighter than the standard ±1% or ±2% grades. For a 5 V output supply, that translates to about ±25 mV regulation error from the reference alone.

Frequently asked questions

Can TL432BIDBZR replace TL431 in a SOT-23-3 footprint?

Yes — the TL432BIDBZR uses the same SOT-23-3 package and three-lead pinout as the TL431 in that package. The key difference is the ±0.5% tolerance, which is tighter than the standard TL431's ±1% or ±2% grades. The reference voltage and output current ratings are compatible.