{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3477MM","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3477MM","canonicalUrl":"https://icboms.com/texas-instruments/LM3477MM","factsUrl":"https://icboms.com/api/mcp/products/LM3477MM","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3477MM, Step-Down Buck/Buck-Boost Controller, 1 Output, Transistor Driver, 500 kHz, 2.97-35 V Supply, 8-VSSOP Package, -40 to 125°C.","salesMarkdown":"## What this controller does — and where it fits The Texas Instruments LM3477MM is a current-mode PWM controller designed for step-down (buck) and buck-boost topologies. It drives an external transistor switch, so the output current capability depends on the pass element you pair it with — the controller itself handles the control loop and gate drive. With a fixed 500 kHz switching frequency, inductor and capacitor values stay small, which helps when board space is tight. Supply voltage spans 2.97 V to 35 V. Junction temperature range is -40°C to 125°C. ## Active part — no LTB risk The LM3477MM carries an active lifecycle status. No last-time-buy notice, no end-of-life window to watch. For a BOM freeze or a long-production-run design, that means you are not scheduling a respin around an impending obsolescence. RoHS non-compliant per the listing, so if your assembly line is RoHS-only, factor in an exemption or a lead-free alternative.","metaTitle":"LM3477MM Buck/Buck-Boost Controller, 500 kHz, 8-VSSOP","metaDescription":"LM3477MM is an active step-down/buck-boost controller from Texas Instruments. 500 kHz switching, 2.97-35 V supply, -40 to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Bulk","Function":"Step-Down","Topology":"Buck, Buck-Boost","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Control Features":"Enable","Duty Cycle (Max)":"93%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"500kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"No","Supplier Device Package":"8-VSSOP","Voltage - Supply (Vcc/Vdd)":"2.97V ~ 35V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.15","stockQuantity":0,"priceTiers":[{"qty":260,"price":"$1.15000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e91c1d110454b9ab311bea7c06decf52.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What are the alternatives for LM3477MM?","answer":"A functional alternative is the LM5150QURUMRQ1, which is an automotive-grade boost controller with AEC-Q100 qualification and a higher switching frequency of 2.3 MHz. However, it is boost-only and cannot do buck or buck-boost like the LM3477MM. For a dual-output current-mode controller with synchronous rectification, consider the UCC2806DWTR, though it runs at 47 kHz and has a narrower temperature range."},{"question":"Can LM3477MM be used in a buck-boost topology?","answer":"Yes, the LM3477MM supports both buck (step-down) and buck-boost topologies. The buck-boost configuration lets you generate a negative output voltage from a positive input, or regulate an output above or below the input rail — useful for inverting supplies and bias generators."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3477MM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3477MM 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}}