{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC1709EG-85#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC1709EG-85PBF","canonicalUrl":"https://icboms.com/analog-devices/LTC1709EG-85PBF","factsUrl":"https://icboms.com/api/mcp/products/LTC1709EG-85%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC1709EG-85#PBF, High Power Polyphase DC-DC Controller, Step-Down Buck Topology, 2 Output Phases, 140kHz-310kHz Switching Frequency, 4V-36V Supply, 36-SSOP Package, -40°C to 85°C Operating Temperature.","salesMarkdown":"## Two-phase synchronous buck controller for high-current rails The LTC1709EG-85#PBF is a high-power polyphase DC-DC controller from Analog Devices, designed as a step-down (buck) regulator with two output phases. It drives external N-channel MOSFETs in a synchronous rectifier configuration, which means it can deliver high current with lower ripple and better thermal distribution than a single-phase design. The input supply range spans 4 V to 36 V, covering common industrial rails like 5 V, 12 V, and 24 V, and the switching frequency is programmable from 140 kHz to 310 kHz — lower frequencies favor efficiency, higher frequencies shrink the inductor footprint. Control features include an enable pin, power-good output, and soft-start, making it straightforward to sequence rails in a multi-voltage system. ## Package and mounting — SSOP-36 on the board Housed in a 36-SSOP package with a 0.209-inch (5.30 mm) body width, this is a surface-mount part that sits in a standard SSOP-36 footprint. The 0.0256-inch (0.65 mm) pin pitch is hand-solderable with a fine tip and magnification, but a hot-air rework station makes removal and replacement much cleaner. The supplier device package is listed as 36-SSOP, so the land pattern is consistent across the family. No exposed thermal pad here — heat dissipation relies on the copper pour and via stitching under the package, so pay attention to the PCB layout guidelines for the power stage. ## Temperature grade and operating environment Rated for -40°C to 85°C ambient (TA), this is an industrial-temperature part. It fits outdoor telecom cabinets, factory-floor motor drives, and power supplies that see seasonal temperature swings. The 99.5% maximum duty cycle means it can run near dropout — useful when the input rail sags close to the output voltage, as in battery-backed systems. ## Lifecycle and sourcing reality For a new design, this means you can commit the BOM line without worrying about a sudden EOL.","metaTitle":"LTC1709EG-85#PBF Dual-Phase Buck Controller, 140-310 kHz","metaDescription":"LTC1709EG-85#PBF is a 2-phase synchronous buck controller from Analog Devices. 4 V to 36 V input, 99.5% duty cycle, -40°C to 85°C. Active, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Bulk","Function":"Step-Down","Topology":"Buck","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"2","Package / Case":"36-SSOP (0.209\\\", 5.30mm Width)","lifecycle_stage":"eol_hot","Control Features":"Enable, Power Good, Soft Start","Duty Cycle (Max)":"99.5%","Number of Outputs":"2","Output Configuration":"Positive","Frequency - Switching":"140kHz ~ 310kHz","Operating Temperature":"-40°C ~ 85°C (TA)","Synchronous Rectifier":"Yes","Supplier Device Package":"36-SSOP","Voltage - Supply (Vcc/Vdd)":"4V ~ 36V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.96","stockQuantity":0,"priceTiers":[{"qty":38,"price":"$7.96000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d3521d336c35534250bbe5d1bbecbe32.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC1709EG-85PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC1709EG-85PBF 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}}