{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC3805IMSE-5#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC3805IMSE-5PBF","canonicalUrl":"https://icboms.com/analog-devices/LTC3805IMSE-5PBF","factsUrl":"https://icboms.com/api/mcp/products/LTC3805IMSE-5%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC3805IMSE-5#PBF multi-topology switching controller, boost/flyback/SEPIC, 70-700 kHz, 10-MSOP-EP exposed pad, tube.","salesMarkdown":"## Multi-topology controller in a small MSOP-EP The LTC3805IMSE-5#PBF is a current-mode switching regulator controller that handles boost, flyback, and SEPIC topologies from a single part number — one BOM line covers several isolated and non-isolated designs. It comes in a 10-MSOP-EP package (3.00 mm width, exposed pad) shipped in a tube, not tape-and-reel, so the pick-and-place feeder setup and shelf storage differ from the reeled variant. The supply range is 3.95 V to 9.5 V on Vcc — tight enough that the input rail needs regulation; a raw battery drooping below 3.95 V drops the controller out. ## Switching frequency and clock sync Switching frequency is programmable from 70 kHz to 700 kHz, and the part accepts an external clock sync — useful for placing the switching harmonics away from a sensitive IF band or ADC sampling rate. Maximum duty cycle is 80%, which caps the step-up ratio in boost mode; for a higher ratio the design moves to a flyback or SEPIC with a transformer turns ratio. ## Temperature grade and board integration Control features include an enable pin and soft-start — the soft-start ramps the duty cycle on power-up, limiting inrush current into the output capacitor and transformer core.","metaTitle":"LTC3805IMSE-5#PBF Boost/Flyback/SEPIC Controller, Active","metaDescription":"LTC3805IMSE-5#PBF multi-topology switching controller, boost/flyback/SEPIC, 70-700 kHz, -40 to 125°C, 10-MSOP-EP. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Package":"Tube","Function":"Step-Up, Step-Up/Step-Down","Topology":"Boost, Flyback, SEPIC","Clock Sync":"Yes","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"10-TFSOP, 10-MSOP (0.118\\\", 3.00mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable, Soft Start","Duty Cycle (Max)":"80%","Number of Outputs":"1","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"70kHz ~ 700kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"No","Supplier Device Package":"10-MSOP-EP","Voltage - Supply (Vcc/Vdd)":"3.95V ~ 9.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.82","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.82000","currency":"USD"},{"qty":10,"price":"$4.32700","currency":"USD"},{"qty":25,"price":"$4.09040","currency":"USD"},{"qty":100,"price":"$3.54510","currency":"USD"},{"qty":250,"price":"$3.36328","currency":"USD"},{"qty":500,"price":"$3.01788","currency":"USD"},{"qty":1000,"price":"$2.54520","currency":"USD"},{"qty":2500,"price":"$2.41794","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What topologies does LTC3805IMSE-5#PBF support?","answer":"It supports boost, flyback, and SEPIC topologies. The output configuration is positive and isolation-capable, so a flyback or SEPIC design can produce a galvanically isolated output with a transformer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC3805IMSE-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/LTC3805IMSE-5PBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}