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Texas Instruments TLVH431ACPK — Analog & Data Acquisition

TLVH431ACPK Adjustable Shunt Voltage Reference, ±1%

MPNTLVH431ACPK
End of Life

Texas Instruments TLVH431ACPK adjustable shunt voltage reference, ±1% tolerance, 1.24V to 18V output, 70 mA cathode current, surface-mount TO-243AA (SOT-89-3) package.

$0.9Ref. price · indicative, final on quote
Texas Instruments TLVH431ACPK datasheet (PDF)
PackagingTO-243AA
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TLVH431ACPK specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output18 V
Voltage - output (Min (Fixed))1.24V
Output current70 mA
Current - cathode100 µA
Operating temperature0°C ~ 70°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±1%
CaseTO-243AA

Product details

RoHS3 compliance confirmed

The TLVH431ACPK is ROHS3 Compliant, meeting the latest EU Restriction of Hazardous Substances directive. No separate exemption or waiver — it clears the full substance ban for lead, mercury, cadmium, and the four phthalates.

SOT-89-3 package — board footprint and thermal

The TLVH431ACPK comes in a TO-243AA package, which is the standard SOT-89-3 footprint. Three leads with a large collector/heat-sink tab on the back side. The tab is the cathode (output) terminal, so the PCB copper pour under the part doubles as a heat spreader for the 70 mA shunt current. Surface-mount assembly, no through-hole.

Frequently asked questions

Is TLVH431ACPK RoHS compliant?

Yes, TLVH431ACPK is ROHS3 Compliant, meeting the full EU RoHS substance restrictions.

What is the difference between TLVH431ACPK and the standard TL431?

The TLVH431ACPK is a lower-voltage version of the classic TL431. Its minimum cathode current is 100 µA versus the TL431's 1 mA, and the reference voltage is 1.24 V instead of 2.5 V. That lower reference lets you regulate rails below 2.5 V — useful for modern 1.8 V and 3.3 V logic supplies. The package and pinout are similar, but the lower operating current and voltage are the real differentiators.

How do I use TLVH431ACPK as a shunt regulator?

Connect the cathode to the positive supply through a current-limiting resistor, the anode to ground, and the reference pin to the resistor-divider tap between cathode and ground. The divider sets the output voltage as V_out = 1.24 V × (1 + R1/R2). The resistor from the supply to the cathode must drop enough voltage to keep the cathode current between 100 µA and 70 mA across the load range.