{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC1149CS-5#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC1149CS-5PBF","canonicalUrl":"https://icboms.com/analog-devices/LTC1149CS-5PBF","factsUrl":"https://icboms.com/api/mcp/products/LTC1149CS-5%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC1149CS-5#PBF, synchronous buck controller, step-down topology, 1 output, transistor driver, up to 250kHz switching, up to 48V supply, 100% duty cycle, current limit and enable control, 16-SOIC package, 0°C to 70°C operating temperature.","salesMarkdown":"## What this buck controller brings to the board The LTC1149CS-5#PBF is a synchronous step-down (buck) switching regulator controller from Analog Devices. It drives external N-channel MOSFETs — the transistor driver output means you pick the FETs for your load, not the other way around. One output, positive configuration, with current limit and enable on the control side. The synchronous rectifier is built into the control loop, which saves a Schottky catch diode and improves efficiency at higher currents. Input supply goes up to 48 V. Switching frequency runs up to 250 kHz. Temperature grade is commercial: 0 °C to 70 °C. ## Package and mounting — what you handle on site 16-SOIC narrow body (3.90 mm width), surface mount. The supplier device package is 16-SO. No lab bench needed to swap one — standard tweezers and a soldering iron with a fine tip are enough if the board is already populated. Orientation is obvious: pin 1 mark on the top, no hidden thermal pad underneath. Shipped in Tube. Not Tape & Reel, so if your pick-and-place line expects reels, you will need to transfer to a feeder tray or order a reeled variant if one exists. ## Lifecycle and sourcing posture Status is Active per the manufacturer. No LTB notice, no NRND flag. ROHS3 compliant, so it clears the current EU material restrictions.","metaTitle":"LTC1149CS-5#PBF Buck Controller, 48V Input, 250kHz, 16-SOIC","metaDescription":"LTC1149CS-5#PBF is an active synchronous buck controller from Analog Devices, rated up to 48V input and 250kHz switching. 16-SOIC, 0°C to 70°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Function":"Step-Down","Topology":"Buck","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable","Duty Cycle (Max)":"100%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"Up to 250kHz","Operating Temperature":"0°C ~ 70°C (TA)","Synchronous Rectifier":"Yes","Supplier Device Package":"16-SO","Voltage - Supply (Vcc/Vdd)":"Up to 48V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$12.91","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$12.91000","currency":"USD"},{"qty":10,"price":"$11.86600","currency":"USD"},{"qty":25,"price":"$11.37360","currency":"USD"},{"qty":100,"price":"$10.02120","currency":"USD"},{"qty":250,"price":"$9.52940","currency":"USD"},{"qty":500,"price":"$8.91460","currency":"USD"},{"qty":1000,"price":"$8.70000","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/1149fa.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is LTC1149CS-5#PBF obsolete or nearing end of life?","answer":"No. The manufacturer lists it as Active. No end-of-life notice or last-time-buy window has been announced."},{"question":"What is the switching frequency of LTC1149CS-5#PBF?","answer":"Switching frequency is programmable up to 250 kHz. That is the upper limit — you set it with an external timing component."},{"question":"What is the equivalent part for LTC1149CS-5#PBF?","answer":"The through-hole sibling LTC1149CN#PBF is functionally identical — same buck topology, same 48 V input, same 250 kHz ceiling, same control features. The difference is mounting: the CN version is DIP, not SOIC. If your board is surface-mount only, stick with the CS-5."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC1149CS-5PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC1149CS-5PBF 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}}