{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431BQDBZRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431BQDBZRG4","canonicalUrl":"https://icboms.com/texas-instruments/TL431BQDBZRG4","factsUrl":"https://icboms.com/api/mcp/products/TL431BQDBZRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431BQDBZRG4, adjustable shunt voltage reference, ±0.5% tolerance, 100 mA output, 700 µA cathode current, SOT-23-3 package, -40°C to 125°C.","salesMarkdown":"## Precision shunt reference for feedback and bias rails The Texas Instruments TL431BQDBZRG4 is a three-terminal adjustable shunt voltage reference that sets a 2.495 V minimum output with a ±0.5% tolerance, the B-grade selection for tighter regulation than the standard ±1% or ±2% variants. Rated for 100 mA continuous output current and a 700 µA minimum cathode current, it drives optocoupler LEDs in isolated power supplies and sets the feedback threshold in linear and switching regulators. The SOT-23-3 package (TO-236-3 / SC-59 footprint) keeps the board area small for dense power-converter layouts. ## Tolerance and temperature grade — what the B-grade buys The ±0.5% initial tolerance on the 2.495 V reference reduces the feedback divider error budget, which matters when the output voltage of a 3.3 V rail must stay within ±2 % over line and load. Output voltage is adjustable up to 36 V by selecting the external resistor divider — the same pinout as the industry-standard TL431, so it drops into existing layouts without a board spin.","metaTitle":"TL431BQDBZRG4 Shunt Reference, ±0.5%, SOT-23-3","metaDescription":"Texas Instruments TL431BQDBZRG4 adjustable shunt voltage reference, ±0.5% tolerance, 100 mA output, SOT-23-3 package, -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","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-23-3","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431BQDBZRG4/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431BQDBZRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431BQDBZRG4 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}}