{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431BIPKG3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431BIPKG3","canonicalUrl":"https://icboms.com/texas-instruments/TL431BIPKG3","factsUrl":"https://icboms.com/api/mcp/products/TL431BIPKG3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431BIPKG3, adjustable shunt voltage reference, ±0.5% tolerance, 2.495V to 36V output, 100 mA output, SOT-89-3 package, -40°C to 85°C.","salesMarkdown":"## ±0.5% tolerance — the accuracy floor for your reference Its ±0.5% tolerance on the 2.495V internal reference means the output voltage at the regulation point stays within half a percent of the programmed value over the operating temperature range — tight enough for most 8- to 12-bit ADC references and precision comparator thresholds. Output is adjustable from 2.495V up to 36V using two external resistors, making it a drop-in for any TL431 socket where the designer needs a known accuracy grade. The shunt architecture sinks current from a supply through a pull-up resistor, so it works as both a reference and an error amplifier in one package. The 100 mA output current capability lets this part drive an optocoupler LED directly in a feedback loop, or bias the base of a pass transistor for a linear regulator. The 700 µA minimum cathode current is the standing current needed to keep the reference in regulation — below that the part drops out of its specified accuracy band. In a typical shunt regulator circuit, the pull-up resistor must be sized to deliver at least 700 µA to the cathode at the minimum supply voltage, plus whatever load current the reference sinks. That sets a floor on the resistor value and the power dissipation in the part. ## SOT-89-3 package — board-fit and thermal note The SOT-89-3 (TO-243AA) package is a surface-mount outline with a large collector tab on the back side that doubles as the cathode connection.","metaTitle":"TL431BIPKG3 Shunt Voltage Reference, ±0.5% Tolerance","metaDescription":"TL431BIPKG3 adjustable shunt reference, ±0.5% tolerance, 2.495V to 36V output, 100 mA, SOT-89-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±0.5%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-243AA","Product Status":"Active","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"100 mA","Current - Supply":"-","Current - Cathode":"700 µA","Base Product Number":"TL431","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"-","Operating Temperature":"-40°C~85°C(TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"SOT-89-3","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431BIPKG3/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance grade of the TL431BIPKG3?","answer":"The TL431BIPKG3 is the B-grade variant with a ±0.5% tolerance on the reference voltage. This is tighter than the standard ±1% or ±2% grades in the TL431 family, making it suitable for precision power supplies and measurement circuits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431BIPKG3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431BIPKG3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}