{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"L6981N33DR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"L6981N33DR","canonicalUrl":"https://icboms.com/stmicroelectronics/L6981N33DR","factsUrl":"https://icboms.com/api/mcp/products/L6981N33DR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics L6981N33DR, step-down buck converter, 1.5A output, 3.3V fixed, 400kHz switching, synchronous rectification, 8-SOIC package.","salesMarkdown":"## Key parametrics and fit decision The L6981N33DR is a 1.5A step-down buck converter from STMicroelectronics, part of the L6981 family, with a fixed 3.3V output and synchronous rectification for improved efficiency at light loads. Input range spans 3.5V to 38V, so it can regulate a 3.3V rail from a 5V, 12V, or 24V supply — common in industrial control, automotive body electronics, and distributed power architectures. Switching at 400kHz, the internal synchronous rectifier eliminates the external catch diode and keeps the inductor small enough for a compact layout on a 2-layer board.","metaTitle":"STMicroelectronics L6981N33DR Buck Converter, 1.5A","metaDescription":"STMicroelectronics L6981N33DR step-down buck converter, 3.5-38V input, 1.5A output, 3.3V fixed, 400kHz, synchronous rectification, -40 to 150°C, 8-SOIC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Current - Output":"1.5A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"400kHz","Operating Temperature":"-40°C ~ 150°C (TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"38V","Voltage - Input (Min)":"3.5V","Supplier Device Package":"8-SO","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.02","priceTiers":[{"qty":1,"price":"$3.02000","currency":"USD"},{"qty":10,"price":"$2.70800","currency":"USD"},{"qty":25,"price":"$2.56040","currency":"USD"},{"qty":100,"price":"$2.21890","currency":"USD"},{"qty":250,"price":"$2.10512","currency":"USD"},{"qty":500,"price":"$1.88894","currency":"USD"},{"qty":1000,"price":"$1.87862","currency":"USD"},{"qty":2500,"price":"$1.87862","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3bec1e5f7e1b895920d2dc564cc937ef.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/L6981N33DR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to L6981N33DR?","answer":"The L6981C33DR is the closest peer within the same L6981 family: it shares the same fixed 3.3V output, 1.5A current rating, 400kHz switching frequency, synchronous rectification, and 8-SOIC package. The key difference is that the L6981N33DR is the standard version, while the C variant may have different control loop compensation or quiescent current — verify the BOM position's specific requirements before substituting."},{"question":"What compliance documentation does STMicroelectronics provide for L6981N33DR?","answer":"The L6981N33DR is ROHS3 compliant, confirming it meets the EU RoHS directive's substance restrictions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/L6981N33DR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/L6981N33DR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}