{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431BQDBVTE4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431BQDBVTE4","canonicalUrl":"https://icboms.com/texas-instruments/TL431BQDBVTE4","factsUrl":"https://icboms.com/api/mcp/products/TL431BQDBVTE4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431BQDBVTE4, adjustable shunt voltage reference, ±0.5% tolerance, 100 mA output, 2.495 V reference, SOT-23-5 package, -40°C to 125°C.","salesMarkdown":"## Precision shunt reference for the BOM line What sets this 'BQ' grade apart is the ±0.5% tolerance on the internal reference, tighter than the standard TL431's 1% or 2% grades. That half-percent window matters when the output rail or ADC reference needs to hold its value across temperature and load without a trim pot. The 100 mA output current rating is the maximum cathode current the device can sink while maintaining regulation. In practice, the shunt current is set by the bias resistor from the supply — pick a resistor that keeps the cathode current above the 700 µA minimum (the quiescent floor) and below 100 mA at the worst-case supply voltage. Below 700 µA the reference loses regulation; above 100 mA you risk thermal runaway in the SOT-23-5 package. The ±0.5% tolerance is specified at 25°C; expect some additional drift over the full temperature range, but the BQ grade keeps the window tighter than the standard part.","metaTitle":"TL431BQDBVTE4 Shunt Reference, ±0.5% Tolerance, SOT-23-5","metaDescription":"Texas Instruments TL431BQDBVTE4 adjustable shunt voltage reference, ±0.5% tolerance, 100 mA output, -40°C to 125°C, SOT-23-5. Active lifecycle.","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)","Tolerance":"±0.5%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","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~125°C(TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"SOT-23-5","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.2300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431BQDBVTE4/alternatives.json"},"ai":{"faq":[{"question":"Is TL431BQDBVTE4 compatible with the standard TL431?","answer":"Yes — it is pin-compatible and functionally identical to the base TL431. The difference is the tighter ±0.5% reference tolerance versus the standard ±1% or ±2% grades. In a circuit that already uses a TL431, the BQDBVTE4 drops in and gives a more precise output without any board change."},{"question":"What is the accuracy of TL431BQDBVTE4?","answer":"The reference voltage tolerance is ±0.5% at 25°C. This is the 'BQ' grade — tighter than the standard TL431's ±1% or ±2% options. For a 2.5 V reference, that means the output stays within ±12.5 mV of the nominal value at room temperature, before temperature drift."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431BQDBVTE4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431BQDBVTE4 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}}