{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431LIAQDBZRQ1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431LIAQDBZRQ1","canonicalUrl":"https://icboms.com/texas-instruments/TL431LIAQDBZRQ1","factsUrl":"https://icboms.com/api/mcp/products/TL431LIAQDBZRQ1","rawCanonicalId":null},"summary":{"shortDescription":"Nexperia TL431LIAQDBZRQ1, Automotive AEC-Q100, adjustable shunt voltage reference, ±1% tolerance, 2.495V min output, 36V max output, 15 mA output, 600 µA cathode, SOT-23-3 package, -40°C to 125°C.","salesMarkdown":"## Adjustable shunt reference with an AEC-Q100 pedigree It delivers a ±1% tolerance reference voltage with an adjustable output from 2.495 V to 36 V, driven by a 15 mA output current capability and a 600 µA minimum cathode current for bias. ## ±1% tolerance — the accuracy floor for the feedback loop A ±1% tolerance on the 2.495 V internal reference translates to a maximum 24.95 mV deviation at the reference pin. For a 12 V output rail using a divider ratio of 4.8:1, this tolerance contributes roughly ±120 mV to the output regulation band — a predictable margin the designer budgets into the load-regulation spec. The adjustable output topology (set by two external resistors) means the same ±1% reference tolerance propagates through the divider ratio; the wider the ratio, the larger the absolute output spread. For tight-rail requirements, use the TL431LIAQDBZRQ1 with a divider that keeps the output deviation within the load's tolerance window. ## SOT-23-3 package: footprint and thermal routing The SOT-23-3 (TO-236-3, SC-59) surface-mount package occupies roughly 3 mm × 1.4 mm of board area. The cathode tab is the primary heat path — a short, wide copper trace to the tab pad keeps the junction temperature rise under 20°C at 15 mA output in still air. The 600 µA minimum cathode current ensures the device stays in regulation even at no load; the designer must ensure the bias resistor from cathode to supply delivers at least this current across the full input voltage range. The base product number is TL431, a long-running industry-standard family.","metaTitle":"TL431LIAQDBZRQ1 Automotive Shunt Regulator, AEC-Q100, ±1%","metaDescription":"TL431LIAQDBZRQ1 adjustable shunt voltage reference, AEC-Q100 qualified, ±1% tolerance, -40°C to 125°C range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±1%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-236-3, SC-59, SOT-23-3","Product Status":"Active","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"15 mA","Current - Supply":"-","Current - Cathode":"600 µA","Base Product Number":"TL431","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"-","Operating Temperature":"-40°C~125°C(TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"SOT-23-3","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/960725404a96d9b0e89f219adcdedfe0.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431LIAQDBZRQ1/alternatives.json"},"ai":{"faq":[{"question":"Is TL431LIAQDBZRQ1 obsolete?","answer":"No."},{"question":"What is the TL431LIAQDBZRQ1 tolerance?","answer":"The tolerance is ±1% on the 2.495 V internal reference. This is the standard precision grade for the TL431 family in automotive and industrial feedback applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431LIAQDBZRQ1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431LIAQDBZRQ1 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}}