{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT8357EMSE#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT8357EMSEPBF","canonicalUrl":"https://icboms.com/analog-devices/LT8357EMSEPBF","factsUrl":"https://icboms.com/api/mcp/products/LT8357EMSE%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT8357EMSE#PBF, DC/DC controller, step-up/step-down, boost/flyback/SEPIC topology, 3V to 60V supply, 100kHz to 2MHz switching, 1 output, transistor driver, 12-MSOP-EP exposed pad, -40°C to 125°C, tube.","salesMarkdown":"## 60V input, low-IQ controller for boost, flyback, and SEPIC designs The Analog Devices LT8357EMSE#PBF is a current-mode DC/DC controller that handles step-up and step-up/step-down conversion across boost, flyback, and SEPIC topologies. Its 3V to 60V supply range makes it a natural fit for 12V/24V/48V automotive, industrial, and telecom rails where input transients can spike well above the nominal bus. The switching frequency is programmable from 100kHz to 2MHz, letting you optimise the magnetics for efficiency or board area — a 2MHz design shrinks the inductor and capacitor values, while 100kHz cuts switching losses in a thermally constrained enclosure. A single transistor driver output drives an external N-channel MOSFET; there is no synchronous rectifier, which keeps the BOM simple but means the Schottky catch diode dissipates the recirculation power. The controller includes current limit, enable, frequency control, power-good flag, and soft start — enough housekeeping to sequence a multi-rail system without a separate supervisor. ## Package and thermal: 12-MSOP with exposed pad The LT8357EMSE#PBF comes in a 12-lead TSSOP package with an exposed pad, supplier device code 12-MSOP-EP. The exposed pad is the primary thermal path — it must be soldered to a copper plane on the PCB. For a controller that drives an external FET, the die dissipation is modest, but in a 2MHz flyback running at high duty cycle the pad still needs a via-stitched ground island to keep junction temperature below the 125°C limit. The tube is the standard shipping medium; if your pick-and-place line prefers tape-and-reel, check the reel option suffix. ## Lifecycle and sourcing posture The LT8357EMSE#PBF carries an Active product status and is ROHS3 compliant. For BOM planning, this means no last-time-buy pressure and no forced redesign horizon. If you need a second-source option for supply resilience, the closest functional match in the same family is the LTC3786IUD#PBF — it shares the same boost/flyback/SEPIC topology, transistor driver output, and control features, but adds synchronous rectification and operates from a 4.5V minimum supply.","metaTitle":"LT8357EMSE#PBF 60V Boost/Flyback/SEPIC Controller","metaDescription":"LT8357EMSE#PBF is an active 60V low-IQ step-up/step-down controller supporting boost, flyback, SEPIC topologies. 100kHz–2MHz switching, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Package":"Tube","Function":"Step-Up, Step-Up/Step-Down","Topology":"Boost, Flyback, SEPIC","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, Power Good, Soft Start","Duty Cycle (Max)":"95%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"100kHz ~ 2MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"No","Supplier Device Package":"12-MSOP-EP","Voltage - Supply (Vcc/Vdd)":"3V ~ 60V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.01","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.01000","currency":"USD"},{"qty":10,"price":"$4.49500","currency":"USD"},{"qty":25,"price":"$4.24960","currency":"USD"},{"qty":100,"price":"$3.68300","currency":"USD"},{"qty":250,"price":"$3.49408","currency":"USD"},{"qty":500,"price":"$3.13524","currency":"USD"},{"qty":1000,"price":"$2.64418","currency":"USD"},{"qty":2500,"price":"$2.51197","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/lt8357.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can LT8357EMSE#PBF be used for isolated flyback converters?","answer":"Yes — the flyback topology is explicitly listed among the supported topologies. The controller drives a primary-side N-channel MOSFET; the isolated secondary winding and optocoupler feedback are external. The 95% maximum duty cycle gives headroom for high step-up ratios."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT8357EMSEPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT8357EMSEPBF 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}}