{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT8705IFE#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT8705IFEPBF","canonicalUrl":"https://icboms.com/analog-devices/LT8705IFEPBF","factsUrl":"https://icboms.com/api/mcp/products/LT8705IFE%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT8705IFE#PBF, Buck-Boost DC/DC Switching Controller, 2.8V to 80V Supply, 100kHz to 400kHz, Synchronous Rectifier, 2-Phase, 38-TFSOP Exposed Pad, -40°C to 125°C.","salesMarkdown":"## Wide-input buck-boost controller for demanding rails The Analog Devices LT8705IFE#PBF is a step-up/step-down (buck-boost) DC/DC switching controller designed to regulate an output voltage whether the input is above, below, or equal to the output. Its 2.8V to 80V supply range makes it a natural fit for automotive battery-stabilized rails, industrial 24V and 48V buses, and battery-powered systems that must hold regulation through deep discharge and overvoltage transients. The controller uses synchronous rectification for high efficiency and drives external N-channel MOSFETs in a 2-phase configuration, which spreads the thermal load and reduces input/output ripple. Switching frequency is programmable from 100kHz to 400kHz, with clock sync available to place switching noise outside a sensitive band. ## What the 2.8V to 80V supply range means for the BOM The 2.8V to 80V supply range covers automotive cold-crank and load dump without an external linear regulator. ## Lifecycle and compliance: active and RoHS3 This part carries an Active lifecycle status, so there is no last-time-buy risk for new designs or ongoing production. It is ROHS3 compliant, meaning no restricted substances above the threshold limits and no time-limited exemptions — it ships clean for global markets. The control features include enable, frequency control, and soft start, giving the designer a standard set of sequencing and startup management hooks.","metaTitle":"LT8705IFE#PBF Buck-Boost Controller, 2.8V-80V, 38-TSSOP-EP","metaDescription":"LT8705IFE#PBF is an active, ROHS3-compliant step-up/step-down DC/DC controller from Analog Devices.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Function":"Step-Up/Step-Down","Topology":"Buck-Boost","Clock Sync":"Yes","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"2","Package / Case":"38-TFSOP (0.173\\\", 4.40mm Width) 31 Leads, Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable, Frequency Control, Soft Start","Number of Outputs":"2","Output Configuration":"Positive","Frequency - Switching":"100kHz ~ 400kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"38-TSSOP-EP","Voltage - Supply (Vcc/Vdd)":"2.8V ~ 80V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$17.39","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$17.39000","currency":"USD"},{"qty":10,"price":"$15.97800","currency":"USD"},{"qty":25,"price":"$15.31560","currency":"USD"},{"qty":100,"price":"$13.49410","currency":"USD"},{"qty":250,"price":"$12.83184","currency":"USD"},{"qty":500,"price":"$12.00396","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/8705ff.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is LT8705IFE#PBF RoHS compliant?","answer":"Yes, it is ROHS3 compliant, with no restricted substances above the threshold limits and no time-limited exemptions."},{"question":"Does LT8705IFE#PBF support 12V to 24V boost conversion?","answer":"Yes. As a buck-boost controller with a 2.8V to 80V supply range, it can step up from 12V to 24V. The synchronous rectifier and 2-phase output keep efficiency high for this conversion ratio."},{"question":"Does LT8705IFE#PBF require external MOSFETs?","answer":"Yes — this is a controller (transistor driver output type), not a monolithic converter. It drives external N-channel MOSFETs in a 2-phase synchronous buck-boost configuration. The MOSFET selection depends on input voltage, output current, and switching frequency."},{"question":"What is the switching frequency of LT8705IFE#PBF?","answer":"The switching frequency is programmable from 100kHz to 400kHz. The part also supports clock synchronization to align the switching noise with an external clock."},{"question":"What is the equivalent or alternative to LT8705IFE#PBF?","answer":"The closest functional equivalent is the LT8705IFE#TRPBF, which is the same die and package in tape-and-reel format. For a different package, the LT8705IUHF#TRPBF is a functional alternative in a QFN package. The LT8708EUHG#PBF is a single-output variant in the same buck-boost family but with one output instead of two."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT8705IFEPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT8705IFEPBF 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}}