{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431LIBQDBZRQ1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431LIBQDBZRQ1","canonicalUrl":"https://icboms.com/texas-instruments/TL431LIBQDBZRQ1","factsUrl":"https://icboms.com/api/mcp/products/TL431LIBQDBZRQ1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431LIBQDBZRQ1, Automotive AEC-Q100, Adjustable Shunt Voltage Reference, ±0.5% Tolerance, 2.495V Reference, 36V Max Output, 15 mA Output, SOT-23-3 Package, -40°C to 125°C.","salesMarkdown":"## Precision shunt reference for automotive BOMs Its defining parametric advantage over the standard TL431 is the ±0.5% tolerance on the 2.495 V reference — half the spread of the typical ±1% grade, which eliminates the need for external trim resistors in many feedback and regulation loops. ## ±0.5% tolerance — what it changes on the BOM The standard TL431 is specified at ±1% or ±2% initial tolerance. For a 5 V output rail, that tightens the worst-case initial accuracy from ±50 mV to ±25 mV — enough to skip a post-assembly trim step in many designs. The cathode current range runs from 600 µA minimum to 15 mA maximum, covering the bias needs of optocoupler feedback in isolated supplies and error-amplifier loads in non-isolated regulators. The 36 V maximum output voltage suits 24 V and 48 V bus rails with margin. ## Automotive qualification and package fit The SOT-23-3 package is a three-pin footprint shared across the entire TL431 family, so the PCB layout is identical whether the BOM uses a ±0.5%, ±1%, or ±2% grade.","metaTitle":"TL431LIBQDBZRQ1 Automotive Shunt Reference, ±0.5% Tolerance","metaDescription":"Texas Instruments TL431LIBQDBZRQ1 adjustable precision shunt reference, AEC-Q100 qualified, ±0.5% tolerance, -40°C to 125°C, SOT-23-3.","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":"±0.5%","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":"$0.6500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/960725404a96d9b0e89f219adcdedfe0.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431LIBQDBZRQ1/alternatives.json"},"ai":{"faq":[{"question":"Can TL431LIBQDBZRQ1 replace a standard TL431?","answer":"Yes — the TL431LIBQDBZRQ1 is pin-compatible and functionally identical to the standard TL431 in the SOT-23-3 package. The only difference is the tighter ±0.5% reference tolerance versus the typical ±1% or ±2% of the standard grade. No PCB change is needed; the same feedback resistor divider values apply."},{"question":"What is the tolerance of TL431LIBQDBZRQ1?","answer":"The reference voltage tolerance is ±0.5% at 25°C, which is the tightest standard grade in the TL431 family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431LIBQDBZRQ1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431LIBQDBZRQ1 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}}