{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431LIAQDBZR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431LIAQDBZR","canonicalUrl":"https://icboms.com/texas-instruments/TL431LIAQDBZR","factsUrl":"https://icboms.com/api/mcp/products/TL431LIAQDBZR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431LIAQDBZR, adjustable shunt voltage reference, ±1% tolerance, 2.495V min output, 36V max, 15 mA output, 1 mA cathode current, -40°C to 125°C, SOT-23-3 surface mount.","salesMarkdown":"## Adjustable shunt reference in a SOT-23-3 package It provides a 2.495V reference at the cathode with a ±1% tolerance, settable to any value up to 36 V with two external resistors. ## Cathode current and output drive The shunt regulator requires a minimum cathode current of 1 mA to maintain regulation, and the output can sink up to 15 mA. This current budget is enough to bias an optocoupler LED in a flyback feedback loop or to drive a small load directly. The 1 mA minimum means the biasing resistor from the supply rail must be sized to guarantee at least that current at the lowest input voltage and highest load. It is ROHS3 compliant.","metaTitle":"TL431LIAQDBZR Shunt Voltage Reference, 2.495V, ±1%, SOT-23-3","metaDescription":"TI TL431LIAQDBZR adjustable shunt voltage reference, 2.495V min output, ±1% tolerance, 15 mA output, -40°C to 125°C, SOT-23-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","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-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":"1 mA","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":"$0.3900","priceTiers":[{"qty":1,"price":"$0.39000","currency":"USD"},{"qty":10,"price":"$0.31800","currency":"USD"},{"qty":25,"price":"$0.29120","currency":"USD"},{"qty":100,"price":"$0.21680","currency":"USD"},{"qty":250,"price":"$0.19652","currency":"USD"},{"qty":500,"price":"$0.16262","currency":"USD"},{"qty":1000,"price":"$0.12197","currency":"USD"},{"qty":3000,"price":"$0.11181","currency":"USD"},{"qty":6000,"price":"$0.10503","currency":"USD"},{"qty":15000,"price":"$0.09825","currency":"USD"},{"qty":30000,"price":"$0.09012","currency":"USD"},{"qty":75000,"price":"$0.08673","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9234c39c5cbd1d015161df75db2c9943.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431LIAQDBZR/alternatives.json"},"ai":{"faq":[{"question":"What is the accuracy tolerance of TL431LIAQDBZR?","answer":"The TL431LIAQDBZR is specified with a ±1% tolerance on the reference voltage. This is the standard accuracy grade for general-purpose shunt reference applications."},{"question":"What is the typical cathode current of TL431LIAQDBZR?","answer":"The minimum cathode current required for regulation is 1 mA. The maximum output current the device can sink is 15 mA."},{"question":"How does TL431LIAQDBZR compare to a series reference like the LM4132?","answer":"The TL431LIAQDBZR is a shunt reference, meaning it sinks current and requires an external resistor to set the bias. A series reference like the LM4132AMF-4.1/NOPB sources a fixed output voltage (4.096 V) with a much tighter tolerance (±0.05%) and lower noise (350 µVp-p, 0.1 Hz to 10 Hz). The shunt topology is simpler for adjustable outputs and higher voltages; the series reference is better for precision fixed-rail applications where noise and drift matter most."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431LIAQDBZR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431LIAQDBZR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}