{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2743MTC/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2743MTC-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2743MTC-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2743MTC%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2743MTC/NOPB step-down buck controller, 3V-6V supply, 50kHz-1MHz switching, synchronous rectifier, 14-TSSOP tube.","salesMarkdown":"## Buck controller with synchronous rectification The Texas Instruments LM2743MTC/NOPB is a voltage-mode buck controller delivering a transistor-drive output for step-down regulation. It operates from a 3V to 6V supply rail and integrates synchronous rectification, which eliminates the external freewheeling diode and improves efficiency at lower output voltages. ## Switching frequency and control flexibility At 1MHz the inductor can be as small as a 4.7µH for a 3.3V output, but the 80% maximum duty cycle limits the step-down ratio — the output cannot exceed 80% of the input voltage. Control features include current limit, enable, power good, soft start, and tracking. The soft start ramps the output voltage on startup to prevent inrush current; the tracking input allows the output to follow another voltage rail during power sequencing.","metaTitle":"LM2743MTC/NOPB Buck Controller, 50kHz-1MHz, 14-TSSOP","metaDescription":"Texas Instruments LM2743MTC/NOPB step-down buck controller, 3V-6V supply, synchronous rectifier, 50kHz-1MHz switching, 14-TSSOP. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Step-Down","Topology":"Buck","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"14-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking","Duty Cycle (Max)":"80%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"50kHz ~ 1MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"14-TSSOP","Voltage - Supply (Vcc/Vdd)":"3V ~ 6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.09","priceTiers":[{"qty":1,"price":"$3.09000","currency":"USD"},{"qty":10,"price":"$2.77800","currency":"USD"},{"qty":25,"price":"$2.62040","currency":"USD"},{"qty":100,"price":"$2.23270","currency":"USD"},{"qty":250,"price":"$2.09648","currency":"USD"},{"qty":500,"price":"$1.83440","currency":"USD"},{"qty":1000,"price":"$1.51994","currency":"USD"},{"qty":2500,"price":"$1.48335","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/29d62f528c68759c2314678932880aa4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2743MTC%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"How can I order LM2743MTC/NOPB or check current pricing?","answer":"The LM2743MTC/NOPB is an active part sourced through authorized distribution."},{"question":"What is the closest functional second-source to LM2743MTC/NOPB?","answer":"The LM25117PMHX/NOPB is a buck controller in a similar function class, but it operates from a higher 4.5V minimum supply voltage and comes in a different package (Tape & Reel). The LM2743MTC/NOPB's 3V minimum supply and 14-TSSOP tube package are distinct — a direct drop-in replacement without board changes is not guaranteed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2743MTC-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/LM2743MTC-NOPB 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}}