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STMicroelectronics TL1431ACL5T — Analog & Data Acquisition

STMicro TL1431ACL5T Shunt Voltage Reference, 0.25% SOT-23-5

MPNTL1431ACL5T
End of Life

STMicroelectronics TL1431ACL5T, adjustable shunt voltage reference, ±0.25% tolerance, 100 mA output, 2.5 V to 36 V, SOT-23-5 package, -20°C to 70°C.

$0.66Ref. price · indicative, final on quote
STMicroelectronics TL1431ACL5T datasheet (PDF)
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TL1431ACL5T specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output36 V
Voltage - output (Min (Fixed))2.5V
Output current100 mA
Current - cathode600 µA
Operating temperature-20°C ~ 70°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±0.25%
CaseSC-74A, SOT-753
Temperature coefficient90ppm/°C

Product details

What this shunt reference delivers

It holds the output at 2.5 V minimum up to 36 V maximum, programmed by two external resistors. The ±0.25% tolerance and 90 ppm/°C temperature coefficient make it a fit for precision feedback loops.

Rated for 100 mA output and a minimum cathode current of 600 µA. The 100 mA ceiling sets the shunt resistor's power dissipation budget in a typical series-pass regulator or optocoupler drive circuit. The 600 µA minimum cathode current is the knee below which the reference loses regulation — the bias resistor from cathode to supply must pull at least that much to keep the part in its linear band. Design the bias resistor for worst-case supply and load so the cathode current never dips below 600 µA.

Temperature range and where it goes

That is a commercial temperature grade.

Frequently asked questions

What is the tolerance of TL1431ACL5T?

The TL1431ACL5T has a ±0.25% tolerance, which is tighter than the standard TL431's 1% or 0.5% grades.

Is TL1431ACL5T equivalent to TL431?

Functionally yes — both are adjustable shunt references with the same 2.5 V internal bandgap and similar output range. But the TL1431ACL5T offers a tighter ±0.25% tolerance and comes in a SOT-23-5 package, while many TL431 variants use SOT-23-3. Pinout is not identical; verify the footprint before substituting.