1% shunt reference in a TO-92 — what it delivers
The Texas Instruments TLV431AILPRE3 is an adjustable shunt voltage reference with a ±1% tolerance — the precision that sets the output voltage accuracy for the whole rail. It regulates down to a minimum cathode current of 80 µA, so the bias resistor can be sized for low-power operation without losing regulation. Output current is rated to 15 mA, enough to drive the feedback divider and a small load in a shunt regulator or series-pass configuration. The 1.24 V minimum output and 6 V maximum output cover the common low-voltage reference range for power supplies, battery chargers, and supervisory circuits.
Package and temperature — design-in notes
Housed in a TO-92-3 through-hole package (TO-226AA formed leads), this part is a drop-in for existing TO-92 footprints on single-sided or low-cost boards. The through-hole body handles manual rework and prototyping easily, but the formed leads need a 0.1-inch pitch hole pattern; verify the pad spacing against your existing TO-92 land pattern before committing the layout.
ROHS3 compliant, which simplifies compliance for EU and global markets. The base product number TLV431 covers a wide family of tolerance and package variants, so if a surface-mount version is needed later, the parametric migration is straightforward without requalifying the reference function.