{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC3863IMSE#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC3863IMSE~4PBF","canonicalUrl":"https://icboms.com/analog-devices/LTC3863IMSE~4PBF","factsUrl":"https://icboms.com/api/mcp/products/LTC3863IMSE%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC3863IMSE#PBF, Buck Controller, Step-Down Topology, 3.5V to 60V Input, 50kHz to 850kHz Switching, 12-MSOP-EP Package, Tube.","salesMarkdown":"## 3.5V to 60V input, 50kHz to 850kHz switching — what that means for your rail The LTC3863IMSE#PBF is a current-mode step-down (buck) controller that takes a 3.5V to 60V supply and drives an external N-channel MOSFET. That 60V max input covers a 48V telecom bus with margin for transients, a 12V automotive rail through cold-crank dips and load-dump spikes, or a 24V industrial supply without an external pre-regulator. Switching frequency is programmable from 50kHz to 850kHz — the low end lets you use a physically larger inductor for lower core loss at light loads, while the high end shrinks the magnetics for a dense board. No clock sync input, so the part free-runs; plan for beat-frequency filtering if the load draws switching noise into a sensitive analog section. ## Positive or negative output — inverting buck-boost without a second controller The output configuration is selectable for positive or negative regulation. Tie the feedback to a positive rail for a standard buck, or reference it to ground to generate a negative output from a positive input — the same external MOSFET and inductor handle both topologies. That saves a second controller IC when you need a -5V or -12V rail off a 12V or 24V bus. No synchronous rectifier means the low-side is a Schottky diode, not a second FET. Simpler gate drive, lower cost, and no risk of shoot-through, but the diode conduction loss sets the efficiency ceiling at high current. This controller is aimed at moderate-current rails (a few amps) where the diode drop is acceptable. ## Package and thermal — 12-MSOP-EP with exposed pad The 12-MSOP-EP (3.00mm × 3.00mm body, 0.118\" width) has an exposed pad on the bottom. The part is rated for junction temperatures up to 125°C — the thermal resistance from junction to ambient depends on the board copper area under the pad, not just the package itself. Tube packaging — the MSOP-EP is not a high-volume reel part in this variant. Expect the ICs to ship in a standard anti-static tube; the pick-and-place feeder needs a tube-compatible shuttle or a manual tube-to-reel transfer. ## Active lifecycle and compliance — no end-of-life watch needed In a 85°C ambient enclosure with a 20°C rise from self-heating, the junction sits at 105°C, leaving 20°C margin before the absolute max. Derate the output current if the board copper is small or the airflow is zero.","metaTitle":"LTC3863IMSE#PBF Buck Controller, 3.5-60V, 12-MSOP-EP","metaDescription":"LTC3863IMSE#PBF step-down DC/DC controller from Analog Devices. 3.5V to 60V input, 50kHz-850kHz switching, -40°C to 125°C. Active production, 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":"12-TSSOP (0.118\\\", 3.00mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Frequency Control, Soft Start","Number of Outputs":"1","Output Configuration":"Positive or Negative","Frequency - Switching":"50kHz ~ 850kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"No","Supplier Device Package":"12-MSOP-EP","Voltage - Supply (Vcc/Vdd)":"3.5V ~ 60V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.42","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$7.42000","currency":"USD"},{"qty":10,"price":"$6.70000","currency":"USD"},{"qty":25,"price":"$6.38880","currency":"USD"},{"qty":100,"price":"$5.54720","currency":"USD"},{"qty":250,"price":"$5.29788","currency":"USD"},{"qty":500,"price":"$4.83042","currency":"USD"},{"qty":1000,"price":"$4.41000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LTC3863IMSE#PBF and how do I get a price?","answer":"The LTC3863IMSE#PBF is sourced to order through independent distribution. Submit an RFQ for a firm price and lead time."},{"question":"What is the switching frequency range of the LTC3863IMSE#PBF?","answer":"The switching frequency is programmable from 50kHz to 850kHz via an external resistor. There is no clock synchronization input — the part free-runs at the programmed frequency."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC3863IMSE~4PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC3863IMSE~4PBF 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}}