{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LMS3655MQURNLRQ1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LMS3655MQURNLRQ1","canonicalUrl":"https://icboms.com/texas-instruments/LMS3655MQURNLRQ1","factsUrl":"https://icboms.com/api/mcp/products/LMS3655MQURNLRQ1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LMS3655MQURNLRQ1, Automotive AEC-Q100, Step-Down Buck Regulator, Adjustable Output, 5.5A, 3.9-36V Input, 400kHz, 22-VQFN-HR (5x4), Surface Mount Wettable Flank.","salesMarkdown":"## Automotive buck regulator for 5.5A point-of-load rails The Texas Instruments LMS3655MQURNLRQ1 is a non-synchronous step-down buck regulator rated for 5.5 A continuous output, built for automotive-grade power rails that need to survive underhood temperatures. Its 3.9 V to 36 V input range covers cold-crank dips on a nominal 12 V bus and handles load-dump transients without an external clamp, while the adjustable output from 1 V to 20 V gives flexibility for logic, sensor, or actuator supplies. Switching at 400 kHz, it balances inductor size against efficiency — the fixed frequency keeps the EMI filter design predictable across the load range. ## Thermal and package realities for the rework bench The wettable flank makes optical solder-joint inspection possible after reflow, which helps on automotive lines where X-ray isn't always practical. Will it survive the hot air? Yes — the QFN body is small enough that a preheat plate at 150 °C and a focused nozzle at 260 °C lifts the part clean without cooking adjacent passives. Surface-mount with wettable flank means the side pads are plated so the fillet wicks up the edge — a visual check confirms the joint is good, no need to X-ray every pad. ## Sourcing and compliance baseline That certification is the authority signal for underhood or chassis-mounted ECUs. Supplied in Tape & Reel (TR) or Cut Tape (CT) — the reel quantity suits production runs; cut tape works for prototypes or small-batch builds.","metaTitle":"TI LMS3655MQURNLRQ1 Buck Regulator, 5.5A, AEC-Q100","metaDescription":"Texas Instruments LMS3655MQURNLRQ1 automotive step-down buck regulator, 5.5A output, 3.9-36V input, 400kHz, 150°C junction, 22-VQFN-HR.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Output Type":"Adjustable","Mounting Type":"Surface Mount, Wettable Flank","Package / Case":"22-VFQFN","lifecycle_stage":"eol_hot","Current - Output":"5.5A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"400kHz","Operating Temperature":"-40°C ~ 150°C (TJ)","Synchronous Rectifier":"No","Voltage - Input (Max)":"36V","Voltage - Input (Min)":"3.9V","Voltage - Output (Max)":"20V","Supplier Device Package":"22-VQFN-HR (5x4)","Voltage - Output (Min/Fixed)":"1V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.55","priceTiers":[{"qty":1,"price":"$6.55000","currency":"USD"},{"qty":10,"price":"$5.92000","currency":"USD"},{"qty":25,"price":"$5.64400","currency":"USD"},{"qty":100,"price":"$4.90080","currency":"USD"},{"qty":250,"price":"$4.68056","currency":"USD"},{"qty":500,"price":"$4.26756","currency":"USD"},{"qty":1000,"price":"$3.71690","currency":"USD"},{"qty":3000,"price":"$3.57924","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/dfc4230dfe734a43640ab39f1344ba78.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LMS3655MQURNLRQ1/alternatives.json"},"ai":{"faq":[{"question":"What input voltage range does the LMS3655MQURNLRQ1 support?","answer":"It accepts 3.9 V to 36 V input, covering 12 V automotive systems with cold-crank margin and surviving load-dump transients up to the 36 V maximum."},{"question":"How can I order LMS3655MQURNLRQ1 or check availability?","answer":"Sourced to order against the BOM through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LMS3655MQURNLRQ1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LMS3655MQURNLRQ1 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}}