{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431IDBVTE4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431IDBVTE4","canonicalUrl":"https://icboms.com/texas-instruments/TL431IDBVTE4","factsUrl":"https://icboms.com/api/mcp/products/TL431IDBVTE4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431IDBVTE4 adjustable shunt voltage reference, ±2.2% tolerance, 100 mA output, 1 mA cathode current, SOT-23-5 package, -40°C to 85°C.","salesMarkdown":"## What this shunt reference does — and why the ±2.2% matters Its ±2.2% tolerance is tighter than the generic 1% or 0.5% grades you see on some siblings — good enough to set a 5 V rail to within 110 mV without a trim pot, which saves a BOM line and a calibration step on the line. The part sinks up to 100 mA through the cathode with a minimum operating current of 1 mA. That 1 mA floor is the catch: below it the reference drops out of regulation, so the bias resistor from the supply rail must be sized to keep at least 1 mA flowing even at no load. In a typical 12 V to 5 V shunt regulator, that means a 7.5 kΩ resistor — easy to forget when you are breadboarding from a bench supply that already holds the output up. ## SOT-23-5 — can I swap it on site? The package is SOT-23-5, also listed as SC-74A / SOT-753. Five pins, 0.95 mm pitch, the body is about 2.9 mm × 1.6 mm. That is small enough to fit in a cramped PSU board but big enough to hand-solder with a fine tip and magnification — no hot-air station required. If you are swapping this in the field, a decent pair of tweezers and a temperature-controlled iron at 350 °C will get it done. No ESD bench? Ground yourself to the chassis before touching the pins — the input impedance on the ref pin is high enough that a static discharge can shift the internal bandgap. TI lists the TL431IDBVTE4 as Obsolete. That means no more factory orders, no last-time-buy window — the part is out of production. If you have it on a current BOM, you need a replacement or a surplus-channel source. The good news: the TL431 function is so common that pin-compatible alternatives exist from multiple manufacturers in the same SOT-23-5 footprint. The bad news: the ±2.2% tolerance grade is less common than the standard 1% or 0.5% variants, so verify the replacement's tolerance matches your circuit's accuracy budget. ## Sourcing reality — quoted to order Because the part is obsolete, it is not sitting on a distributor shelf in volume. We source it through independent distribution channels — broker stock, surplus lots, and verified inventory from our network. No stock-holding claim; every order is a procurement event. If you need a production-quantity alternative, we can also help qualify a drop-in replacement.","metaTitle":"TL431IDBVTE4 Shunt Reference, ±2.2% Tolerance, SOT-23-5","metaDescription":"Texas Instruments TL431IDBVTE4 adjustable shunt voltage reference. ±2.2% tolerance, 100 mA output, SOT-23-5.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR)","Tolerance":"±2.2%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","Product Status":"Obsolete","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~85°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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/99b53f28cf28b982a16c2a9ac87cd6e9.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431IDBVTE4/alternatives.json"},"ai":{"faq":[{"question":"Is TL431IDBVTE4 obsolete and what is the recommended replacement?","answer":"Yes, TI lists the TL431IDBVTE4 as Obsolete. There is no single official successor from TI in the exact ±2.2% tolerance grade, but the standard TL431 family (e.g., TL431AIDBZR in SOT-23-3 or TL431IDBZR in SOT-23-3) is pin-compatible if your PCB uses the SOT-23-5 footprint with the extra pin as NC. For a direct SOT-23-5 replacement, look at the TL431IDBVT (same base part, different tape/reel suffix) — verify the tolerance grade matches your design."},{"question":"What is the exact tolerance and cathode current for TL431IDBVTE4?","answer":"The tolerance is ±2.2%. The minimum cathode current for regulation is 1 mA, and the maximum continuous cathode current is 100 mA. The reference voltage is 2.495 V nominal."},{"question":"Can TL431IDBVT be used instead of TL431IDBVTE4?","answer":"The TL431IDBVT shares the same base product number (TL431) and the same SOT-23-5 package. The difference is the tape-and-reel suffix — the IDBVTE4 uses a specific reel configuration. Electrically they are identical: same ±2.2% tolerance, same 1 mA cathode current, same 100 mA output. If your pick-and-place machine can handle the reel variant, the IDBVT is a direct drop-in substitute."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431IDBVTE4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431IDBVTE4 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}}