{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3671MF-1.6","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3671MF-1.6","canonicalUrl":"https://icboms.com/texas-instruments/LM3671MF-1.6","factsUrl":"https://icboms.com/api/mcp/products/LM3671MF-1.6","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3671MF-1.6, Step-Down Buck Regulator, Fixed 1.6V Output, 600mA, 2MHz Switching, SOT-23-5, -40°C to 85°C.","salesMarkdown":"## Fixed 1.6V rail from a 2.7V–5.5V input The Texas Instruments LM3671MF-1.6 is a synchronous buck regulator that delivers a fixed 1.6V output at up to 600mA from an input range of 2.7V to 5.5V. The 2MHz switching frequency lets you use small 1µH–2.2µH inductors and low-ESR ceramic capacitors, shrinking the total solution footprint. Internal synchronous rectifier means no external Schottky diode is needed — just the inductor, input/output caps, and you have a clean 1.6V rail. ## 600mA output — load budget check The 600mA current rating is the continuous output capability. If your target circuit draws 500mA steady-state with 100mA peaks, this part has headroom. But if you need 800mA or more, step up to a higher-current buck like the LMR33630 (3A) or LMS3655 (5.5A). At light loads (below ~50mA), the part still regulates, but efficiency drops — consider a PFM-mode part if your design spends most time in low-power sleep. ## 2MHz switching — inductor and cap sizing At 2MHz, the ripple current is low enough that a 2.2µH inductor and 10µF ceramic output cap give a clean rail. That frequency also keeps switching noise above the AM radio band, which helps in RF-sensitive designs. The trade-off: switching losses at 2MHz are higher than a 500kHz part, so expect around 85–90% efficiency at full load — fine for most battery-powered or 5V-bus applications. The synchronous rectifier helps maintain efficiency across the temperature range. If you need 125°C or 150°C operation, look at the automotive-grade peers (LM53625, LMR33630) — those are AEC-Q100 qualified and rated to 125°C or 150°C junction. ## SOT-23-5 package — layout notes The LM3671MF-1.6 comes in an SOT-23-5 (SC-74A) package. The small footprint saves board space, but thermal dissipation is limited — the junction-to-ambient thermal resistance is around 220°C/W, so at 600mA output with 1V dropout (5V in, 1.6V out), expect about 2W dissipation, which will push junction temperature above 85°C in still air. For high-current or high-ambient designs, add a copper pour on the PCB or use the exposed-pad variant (if available).","metaTitle":"LM3671MF-1.6 Buck Regulator, 600mA, 2MHz, Fixed 1.6V Output","metaDescription":"Texas Instruments LM3671MF-1.6 step-down DC-DC converter, 2.7V–5.5V input, fixed 1.6V output at 600mA, 2MHz switching frequency, SOT-23-5. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Package":"Bulk","Function":"Step-Down","Topology":"Buck","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Current - Output":"600mA","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"2MHz","Operating Temperature":"-40°C ~ 85°C (TA)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"5.5V","Voltage - Input (Min)":"2.7V","Supplier Device Package":"SOT-23-5","Voltage - Output (Min/Fixed)":"1.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.41","stockQuantity":0,"priceTiers":[{"qty":740,"price":"$0.41000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3b4427bc71558922d4425f14c3247345.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What are the alternatives or equivalents to LM3671MF-1.6?","answer":"For higher current or automotive temperature range, consider the LM53625 (2.5A, AEC-Q100, up to 150°C) or the LMR33630 (3A, AEC-Q100, up to 125°C). These are not pin-compatible but serve the same buck-regulator function with wider input ranges."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3671MF-1.6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3671MF-1.6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}