{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3477AMMX/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3477AMMX-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM3477AMMX-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM3477AMMX%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3477AMMX/NOPB, High Efficiency High-Side Buck Controller, Step-Down (Buck, Buck-Boost), 1 Output, Transistor Driver, 500kHz Switching, 93% Max Duty Cycle, 2.97V to 35V Supply, -40°C to 125°C, 8-VSSOP, Surface Mount, Active.","salesMarkdown":"## What this buck controller does The Texas Instruments LM3477AMMX/NOPB is a high-efficiency, high-side N-channel MOSFET switching controller configured for step-down (buck) and buck-boost topologies. It drives an external transistor, giving you flexibility to size the power stage for your load. The part operates from a 2.97 V to 35 V supply rail and switches at a fixed 500 kHz, which keeps the inductor and output capacitor physically small — useful when board space is tight. A single output delivers positive regulation, and the controller includes an Enable pin for on/off control. The maximum duty cycle of 93 % means the controller can maintain regulation even when the input voltage is only slightly above the output — handy for battery-powered systems where the input sags near the end of discharge. The junction temperature range is -40°C to 125°C. No synchronous rectifier is built in. ## Package and mounting The LM3477AMMX/NOPB comes in an 8-VSSOP package (3.00 mm width, 0.118\" pitch) for surface-mount assembly. The supplier device package is 8-VSSOP, which is the standard footprint for this controller family. The listing shows the shipping medium as Bulk — not Tape & Reel — so if your pick-and-place line expects reeled parts, confirm the packaging variant before ordering. ## Lifecycle and sourcing The LM3477AMMX/NOPB is listed as Active in production.","metaTitle":"LM3477AMMX/NOPB Buck Controller, 500kHz, 93% Duty Cycle","metaDescription":"LM3477AMMX/NOPB high-efficiency step-down controller, 2.97V-35V supply, 500kHz switching, 93% max duty cycle, -40°C to 125°C, 8-VSSOP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"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":"$1.22","stockQuantity":0,"priceTiers":[{"qty":247,"price":"$1.22000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e91c1d110454b9ab311bea7c06decf52.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the switching frequency of LM3477AMMX/NOPB?","answer":"The switching frequency is fixed at 500 kHz. This determines the inductor and output capacitor values — higher frequency means smaller magnetics but more switching loss."},{"question":"What is the maximum duty cycle of LM3477AMMX/NOPB?","answer":"The maximum duty cycle is 93 %. That means the controller can keep the output regulated even when the input voltage is only about 7 % above the output voltage — important for low-dropout operation."},{"question":"What package does LM3477AMMX/NOPB come in?","answer":"It comes in an 8-VSSOP surface-mount package (3.00 mm width, 0.118\" pitch). The supplier device package is 8-VSSOP."},{"question":"Is LM3477AMMX/NOPB RoHS compliant?","answer":"The NOPB suffix in the order code indicates a lead-free (RoHS-compliant) finish. No separate RoHS certificate is listed, but the suffix is the standard TI designation for RoHS compliance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3477AMMX-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3477AMMX-NOPB 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}}