{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431QPKG3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431QPKG3","canonicalUrl":"https://icboms.com/texas-instruments/TL431QPKG3","factsUrl":"https://icboms.com/api/mcp/products/TL431QPKG3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431QPKG3 adjustable shunt voltage reference, ±2.2% tolerance, 100 mA output, 2.495 V reference, -40 to 125 °C, SOT-89-3 package.","salesMarkdown":"## Adjustable shunt reference, ±2.2% — tight enough for most feedback loops Its 2.495 V minimum output is the internal bandgap; the output can be set anywhere from that up to 36 V with two external resistors. The ±2.2% tolerance is tighter than the standard ±2% or ±1% grades, making it suitable for designs that need better than 2% initial accuracy without moving to a 0.5% part. ## 100 mA output — thermal limit in SOT-89-3 The device can sink 100 mA continuously, but in the SOT-89-3 package the thermal impedance limits practical dissipation. The 1 mA minimum cathode current means the reference always draws at least 1 mA to maintain regulation. That sets a floor on the bias resistor in a shunt configuration; the resistor must supply 1 mA plus the load current.","metaTitle":"TL431QPKG3 Shunt Reference, ±2.2% Tolerance, SOT-89-3","metaDescription":"TL431QPKG3 adjustable shunt reference, ±2.2% tolerance, 100 mA output, -40 to 125 °C, SOT-89-3.","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":"±2.2%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-243AA","Product Status":"Active","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"100 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-89-3","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2e8567ad04842692d5fb8309c69e90b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431QPKG3/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between TL431QPKG3 and TL431QDBZR?","answer":"Both are adjustable shunt references from the same TL431 family. The QPKG3 variant is in a SOT-89-3 package (TO-243AA), while the QDBZR is in a smaller SOT-23-3 package. The SOT-89-3 offers better thermal dissipation for higher continuous current. The tolerance and temperature range are the same for both."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431QPKG3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431QPKG3 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}}