TL431AIDBZR

TL431AIDBZR is a shunt voltage reference from Texas Instruments in a compact SOT-23-3 package, supplied on tape and reel. Devices of this type act as a programmable shunt regulator and reference, and the TL431 family is widely used in the feedback path of isolated power supplies as well as for reference rails and supervision functions in adapters, chargers and industrial power stages. The A in the part code identifies the tighter accuracy grade of the family, so quoting the full code matters when a design depends on that grade. The three-pin SOT-23 package keeps the reference and its small external network in very little board area, which suits dense power designs. Texas Instruments lists this exact DBZ-package tape-and-reel code as active. Selection and sourcing advice: set the regulated voltage with the external divider following the TL431 datasheet equations and stability guidance, paying attention to cathode current and to the behaviour with capacitive loads described in the datasheet; confirm the SOT-23-3 pinout against your footprint, because shunt references from different families are not always pin-compatible, and order TL431AIDBZR in full rather than a plain TL431 code so that grade, package and packing all match the intended build. Parameters verified against Texas Instruments documentation.