{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC3867EUF#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC3867EUFPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC3867EUFPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC3867EUF%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC3867EUF#PBF, Step-Down (Buck) DC/DC Controller, 1 Output, Transistor Driver, 200kHz ~ 1.2MHz, 4V ~ 38V Supply, 24-WFQFN Exposed Pad, -40°C to 125°C.","salesMarkdown":"## Synchronous buck controller for 4V to 38V rails The LTC3867EUF#PBF is a single-phase synchronous step-down DC/DC controller from Analog Devices, designed to drive external N-channel MOSFETs. It accepts a 4V to 38V supply and delivers a regulated positive output via a transistor driver. The switching frequency is programmable from 200kHz to 1.2MHz, letting you trade inductor size against efficiency. Control features include current limit, enable, frequency control, power-good flag, soft start, and tracking — enough for sequenced power-up in multi-rail systems. The 24-QFN (4x4 mm) package with exposed pad handles the thermal load. Typical applications are intermediate bus conversion, industrial power supplies, and automotive-grade point-of-load regulators where the -40°C to 125°C junction temperature range is needed. ## What the switching frequency range means for the BOM A 200kHz to 1.2MHz programmable range gives the designer a real choice: run at the low end for best efficiency and wider inductor saturation margin, or push toward 1.2MHz to shrink the inductor footprint and reduce output capacitor count. The 98% maximum duty cycle supports high step-down ratios without dropout issues. Synchronous rectification is built in, so external Schottky catch diodes are unnecessary — that saves board area and BOM cost. ## Lifecycle and sourcing posture ROHS3 compliant. For volume BOM lines, this part is sourced through independent distribution and quoted to order against an RFQ. No LTB risk on the horizon.","metaTitle":"LTC3867EUF#PBF Buck Controller, 200kHz-1.2MHz, 24-QFN","metaDescription":"LTC3867EUF#PBF is an active step-down DC/DC controller from Analog Devices. Synchronous buck topology, 4V-38V input, 200kHz-1.2MHz switching.","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":"24-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking","Duty Cycle (Max)":"98%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"200kHz ~ 1.2MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"24-QFN (4x4)","Voltage - Supply (Vcc/Vdd)":"4V ~ 38V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.67","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$7.67000","currency":"USD"},{"qty":10,"price":"$6.92700","currency":"USD"},{"qty":25,"price":"$6.60480","currency":"USD"},{"qty":100,"price":"$5.73500","currency":"USD"},{"qty":250,"price":"$5.47724","currency":"USD"},{"qty":500,"price":"$4.99394","currency":"USD"},{"qty":1000,"price":"$4.34956","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/3867f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional second-source for LTC3867EUF#PBF?","answer":"The LTC3891EFE#PBF is a close functional peer — also a synchronous buck controller with similar control features and the same 4V minimum supply, 125°C junction rating, and 24-pin package. It offers a 99% duty cycle and a fixed 105kHz switching frequency. Verify pin compatibility before substituting."},{"question":"Can LTC3867EUF#PBF be used for a step-up converter?","answer":"No. The LTC3867EUF#PBF is a step-down (buck) controller only. It cannot be configured as a step-up converter."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC3867EUFPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC3867EUFPBF 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}}