{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431AIPK","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431AIPK","canonicalUrl":"https://icboms.com/texas-instruments/TL431AIPK","factsUrl":"https://icboms.com/api/mcp/products/TL431AIPK","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431AIPK, adjustable shunt voltage reference, ±1% tolerance, 2.495V minimum output, 100 mA output, 700 µA cathode current, SOT-89-3 package, -40°C to 85°C.","salesMarkdown":"## 2.495V shunt reference in a SOT-89-3 It can sink up to 100 mA and requires only 700 µA cathode current to regulate. The SOT-89-3 package (TO-243AA) is a surface-mount footprint with a tab that helps pull heat into the board copper — useful when the part is running near its 100 mA ceiling. The output can be set anywhere from 2.495V up to 36 V using two external resistors. The 700 µA cathode current is the minimum needed to keep the internal error amplifier in its linear region — if the bias resistor lets the cathode current drop below that, the reference voltage drifts. At the other end, the 100 mA output limit is the maximum continuous current the shunt can sink; above that the junction temperature climbs fast in the SOT-89-3. ## Temperature range and package reworkability The SOT-89-3 has a large centre tab that makes hand rework straightforward: preheat the board from the back, hit the tab with hot air, and lift the part clean. The tab is electrically connected to the anode, so no thermal-via trickery is needed — just a solid copper pour under the part.","metaTitle":"TL431AIPK Shunt Voltage Reference, ±1%, SOT-89-3","metaDescription":"Texas Instruments TL431AIPK adjustable shunt reference, 2.495V min output, 100 mA output, ±1% tolerance, SOT-89-3 package.","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":"±1%","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":"$0.4300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431AIPK/alternatives.json"},"ai":{"faq":[{"question":"What package is TL431AIPK available in?","answer":"It is a surface-mount package with a centre tab that serves as the anode connection."},{"question":"What is the cathode current requirement for TL431AIPK?","answer":"The minimum cathode current to maintain regulation is 700 µA. Design the bias resistor to deliver at least this current across the full input voltage range and load conditions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431AIPK","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431AIPK 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}}