{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ATL431LIBQDBZR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ATL431LIBQDBZR","canonicalUrl":"https://icboms.com/texas-instruments/ATL431LIBQDBZR","factsUrl":"https://icboms.com/api/mcp/products/ATL431LIBQDBZR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ATL431LIBQDBZR adjustable shunt voltage reference, ±0.5% tolerance, 2.5 V to 36 V output, 100 µA min cathode current, SOT-23-3 package, -40°C to 125°C.","salesMarkdown":"## Precision shunt reference for tight-regulation loops The Texas Instruments ATL431LIBQDBZR is an adjustable shunt voltage reference in a SOT-23-3 package, offering a ±0.5% tolerance that tightens the feedback window in power supplies and data converters compared to the generic 1% TL431-class parts. Output voltage is adjustable from 2.5 V up to 36 V via two external resistors, covering the common reference rails for 3.3 V, 5 V, 12 V, and 24 V systems. ## Low cathode current for battery-budget designs The minimum cathode current of 100 µA allows the reference to operate with minimal bias overhead, which matters in always-on sensor nodes or portable instruments where every microamp counts. Maximum output current is 15 mA, so the ATL431LIBQDBZR can directly drive an optocoupler LED or a small load without an external buffer.","metaTitle":"ATL431LIBQDBZR Shunt Reference, ±0.5% Tolerance, SOT-23-3","metaDescription":"Texas Instruments ATL431LIBQDBZR adjustable shunt voltage reference, ±0.5% tolerance, 100 µA min cathode current, -40°C to 125°C.","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-236-3, SC-59, SOT-23-3","Product Status":"Active","Reference Type":"Shunt","lifecycle_stage":"eol_hot","Current - Output":"15 mA","Current - Supply":"-","Current - Cathode":"100 µA","Base Product Number":"ATL431","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)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/01036f6b90e1bdae2ec431511e354e53.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ATL431LIBQDBZR/alternatives.json"},"ai":{"faq":[{"question":"Is ATL431LIBQDBZR a direct replacement for TL431?","answer":"The ATL431LIBQDBZR is pin-compatible with the standard TL431 in the SOT-23-3 footprint and shares the same adjustable shunt topology, but its ±0.5% tolerance and 100 µA minimum cathode current are tighter than the typical TL431's 1% tolerance and 400 µA minimum. Check the feedback resistor divider and bias current in your circuit before substituting."},{"question":"What is the minimum cathode current for ATL431LIBQDBZR?","answer":"The minimum cathode current is 100 µA, which is the lowest bias current required to maintain regulation. This allows the reference to operate with very low quiescent overhead."},{"question":"Is ATL431LIBQDBZR RoHS compliant and lead-free?","answer":"The ATL431LIBQDBZR is listed with a Tape & Reel / Cut Tape package option that is RoHS-compliant and lead-free per TI's standard green packaging. No separate RoHS certificate is needed for BOM compliance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ATL431LIBQDBZR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ATL431LIBQDBZR 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}}