{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC7805RUFDM#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC7805RUFDMPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC7805RUFDMPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC7805RUFDM%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC7805RUFDM#PBF, dual-phase synchronous buck controller, 4.5V-40V input, 100kHz-3MHz switching, 150°C junction, AEC-Q100 automotive, 28-QFN wettable flank.","salesMarkdown":"## Automotive dual-phase buck controller with 150°C junction rating The LTC7805RUFDM#PBF is a dual-output synchronous buck controller from Analog Devices, designed for automotive power-train and chassis-domain DC-DC converters. Its AEC-Q100 qualification (Grade 0 implied by the 150°C junction rating) means it passes the full automotive reliability stress suite — temperature cycling, HAST, and ESD — required for under-hood or transmission-mounted ECUs. The 4.5V to 40V input range covers 12V and 24V automotive rails with margin for load-dump transients (up to 40V) and cold-crank dips down to 4.5V. The 100% duty cycle capability lets the top MOSFET stay on when the input voltage falls near the output — critical during engine cranking when the battery voltage sags below 6V. Switching frequency is programmable from 100kHz to 3MHz via a resistor on the RT pin. At 2MHz the inductor footprint shrinks to a 4x4mm shielded type, while the 100kHz end of the range maximizes efficiency at heavy loads. The part does not support clock synchronization — the oscillator runs free at the set frequency. ## Package, footprint, and thermal considerations Housed in a 28-lead WFQFN with exposed pad (4x5mm body, 0.5mm pitch). The wettable-flank option (RUF suffix) creates a visible solder fillet on the package side — this allows automated optical inspection (AOI) of the solder joint, a requirement for automotive PCBA quality gates. The exposed pad must be soldered to a thermal via array on the PCB ground plane to achieve the rated junction-to-ambient thermal resistance. Without the pad connection, the 150°C junction rating is unreachable at full load — the die self-heats above the silicon limit. The part is shipped in tube packaging (50 units per tube). For high-volume reflow, request the tape-and-reel option (LTC7805RUFDM#TRPBF) — the tube variant is intended for prototype builds and low-volume production. ## Active lifecycle and sourcing posture ROHS3 compliant (exemption-free), which satisfies full automotive RoHS conformance requirements. Sourced through authorized distribution channels — quoted to order against the BOM quantity. No stock-holding claim; availability and current pricing confirmed at RFQ. The date-code and lot trace back to the Analog Devices factory; the laser-etched marking on the QFN top matches the manufacturer's plant code for that week — a clean chain for counterfeit screening.","metaTitle":"LTC7805RUFDM#PBF Dual Buck Controller, 40V, AEC-Q100","metaDescription":"Analog Devices LTC7805RUFDM#PBF dual-phase synchronous buck controller, 4.5-40V input, 150°C junction, AEC-Q100 automotive grade. Active production, RoHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Grade":"Automotive","Package":"Tube","Function":"Step-Down","Topology":"Buck","Clock Sync":"No","Output Type":"Adjustable","Mounting Type":"Surface Mount, Wettable Flank","Output Phases":"2","Qualification":"AEC-Q100","Package / Case":"28-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Power Good","Duty Cycle (Max)":"100%","Number of Outputs":"2","Output Configuration":"Positive","Frequency - Switching":"100kHz ~ 3MHz","Operating Temperature":"-40°C ~ 150°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"28-QFN (4x5)","Voltage - Supply (Vcc/Vdd)":"4.5V ~ 40V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.04","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$7.04000","currency":"USD"},{"qty":10,"price":"$6.36200","currency":"USD"},{"qty":25,"price":"$6.06640","currency":"USD"},{"qty":100,"price":"$5.26760","currency":"USD"},{"qty":250,"price":"$5.03080","currency":"USD"},{"qty":500,"price":"$4.58692","currency":"USD"},{"qty":1000,"price":"$3.99506","currency":"USD"},{"qty":2500,"price":"$3.84709","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7c69fddc1912d17024f9a031f70126b3.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LTC7805RUFDM#PBF and how do I get a price?","answer":"Sourced through authorized distribution channels. Quoted to order against the BOM quantity — availability and current pricing confirmed at RFQ. No stock-holding claim; lead time depends on the order volume and Analog Devices' factory backlog at quote time."},{"question":"Will LTC7805RUFDM#PBF drop into a panel that was specified around LTC3728EUH#PBF without rewiring?","answer":"No — the LTC3728EUH#PBF is a 36-lead SSOP package, while the LTC7805RUFDM#PBF is a 28-lead QFN. The pinout, footprint, and thermal pad are different; a board spin is required. Functionally both are dual-phase buck controllers, but the LTC7805 adds the automotive temperature grade (150°C junction vs 85°C ambient) and a wider input range (40V vs 36V)."},{"question":"What compliance documentation does Analog Devices provide for LTC7805RUFDM#PBF?","answer":"The part is ROHS3 compliant (no exemptions). Analog Devices publishes a RoHS certificate of compliance and a material declaration sheet (IPC-1752) upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC7805RUFDMPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC7805RUFDMPBF 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}}