{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431IDT","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TL431IDT","canonicalUrl":"https://icboms.com/stmicroelectronics/TL431IDT","factsUrl":"https://icboms.com/api/mcp/products/TL431IDT","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TL431IDT adjustable shunt voltage reference, ±2.21% tolerance, 100 mA output, 2.495 V reference, 8-SOIC surface-mount package, -40°C to 105°C operating temperature.","salesMarkdown":"## Tolerance and output current — the accuracy and drive limits The TL431IDT is an adjustable shunt voltage reference from STMicroelectronics, part of the industry-standard TL431 family. Its key specifications include a ±2.21% tolerance on the internal 2.495 V reference, a 100 mA maximum output current, and a minimum cathode current of 1 mA. The output voltage is adjustable up to 36 V using two external resistors. ## Where it fits — power supplies, chargers, and feedback loops This shunt reference is used in switch-mode power supply feedback loops, linear regulators, battery chargers, and overvoltage protection circuits. ## What the ±2.21% tolerance means for the BOM The ±2.21% tolerance on the 2.495 V reference translates to a worst-case voltage deviation of about ±55 mV at the reference pin. For a 12 V output supply using a typical resistor divider, this adds roughly ±0.3% to the overall output tolerance. If the design requires tighter regulation, consider the TL431A or TL431B grades with ±1% or ±0.5% tolerance respectively.","metaTitle":"STMicroelectronics TL431IDT Shunt Reference","metaDescription":"STMicroelectronics TL431IDT adjustable shunt reference, ±2.21% tolerance, 100 mA output, 2.495 V reference, -40°C to 105°C, 8-SOIC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±2.21%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","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~105°C(TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"8-SOIC","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d3856169bdff63c55d41eeae5a91cadc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431IDT/alternatives.json"},"ai":{"faq":[{"question":"What is the TL431IDT tolerance and output current?","answer":"The tolerance is ±2.21% on the 2.495 V internal reference. The maximum output current is 100 mA, with a minimum cathode current of 1 mA for proper regulation."},{"question":"How does the TL431IDT compare to the TL431AIDT?","answer":"The TL431IDT has a ±2.21% tolerance, while the TL431AIDT typically offers ±1% tolerance. The TL431AIDT is the tighter-tolerance sibling for designs that need better regulation accuracy."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TL431IDT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TL431IDT 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}}