{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM25085AMME/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM25085AMME-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM25085AMME-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM25085AMME%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM25085AMME/NOPB, non-synchronous buck controller, 4.5V–42V input, up to 1 MHz switching, 8-VSSOP package, -40°C to 125°C.","salesMarkdown":"## What this buck controller does on your rail The Texas Instruments LM25085AMME/NOPB is a non-synchronous step-down (buck) controller that drives an external transistor — no built-in FETs, so you size the power stage to your load. It handles a 4.5V to 42V input rail and switches at up to 1 MHz, which keeps the inductor small and the transient response tight. The single-output, positive-configuration design is meant for industrial and automotive supplies where you need a regulated lower voltage from a wide, often noisy bus. The 100% duty cycle capability means it can pass the input straight through when the drop is minimal, handy for battery-backed hold-up scenarios. ## Input range and switching frequency — the design decisions The 4.5V to 42V supply range covers 12V and 24V industrial rails, plus 48V telecom with margin. If your board sees cold-crank dips below 4.5V, this controller drops out — no internal LDO to keep it alive. The 1 MHz switching ceiling lets you pick a 10 µH or smaller inductor, but the non-synchronous topology means you lose a few points of efficiency versus a synchronous part; the trade-off is simpler BOM and no risk of cross-conduction. The -40°C to 125°C junction rating suits outdoor telecom cabinets and under-hood automotive zones where the ambient hits 85°C and the self-heating adds another 20°C.","metaTitle":"LM25085AMME/NOPB Buck Controller, 4.5V–42V Input, 1 MHz","metaDescription":"Texas Instruments LM25085AMME/NOPB step-down buck controller. 4.5V to 42V input, up to 1 MHz switching, -40°C to 125°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","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":"Current Limit, Frequency Control","Duty Cycle (Max)":"100%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"Up to 1MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"No","Supplier Device Package":"8-VSSOP","Voltage - Supply (Vcc/Vdd)":"4.5V ~ 42V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.72","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.72000","currency":"USD"},{"qty":10,"price":"$2.44700","currency":"USD"},{"qty":25,"price":"$2.30800","currency":"USD"},{"qty":100,"price":"$1.96650","currency":"USD"},{"qty":250,"price":"$1.84652","currency":"USD"},{"qty":500,"price":"$1.61570","currency":"USD"},{"qty":1250,"price":"$1.33873","currency":"USD"},{"qty":2500,"price":"$1.30650","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ed6a633b735df6fd03b233db3633cd8a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the switching frequency of LM25085AMME/NOPB?","answer":"The switching frequency is programmable up to 1 MHz. The actual frequency is set by an external resistor; the part does not have clock sync, so multiple controllers on the same board may beat if not carefully phased."},{"question":"Is the LM25085 a synchronous buck controller?","answer":"No — it uses a non-synchronous rectifier. The external diode handles the freewheeling current, so efficiency is lower than a synchronous design, but the BOM is simpler and there is no shoot-through risk."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM25085AMME-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}