{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT3690IUFE#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT3690IUFEPBF","canonicalUrl":"https://icboms.com/analog-devices/LT3690IUFEPBF","factsUrl":"https://icboms.com/api/mcp/products/LT3690IUFE%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT3690IUFE#PBF step-down buck regulator, adjustable output, 4 A, 3.9-36 V input, 26-QFN exposed pad, tube.","salesMarkdown":"## Active 4 A non-synchronous buck The LT3690IUFE#PBF is an active-production step-down (buck) regulator from Analog Devices, rated for a continuous 4 A output current — the highest in this non-synchronous family of adjustable switchers. Its 3.9 V to 36 V input range covers common industrial, automotive, and battery rails, and the adjustable output (0.8 V to 20 V) lets a single design serve core and I/O voltages without a second regulator. ## Switching frequency and thermal envelope The switching frequency can be set from 138 kHz to 1.5 MHz — lower frequencies improve efficiency but require a larger inductor; higher frequencies shrink the magnetics at the cost of increased switching losses. Because it uses an external Schottky diode (non-synchronous topology), the BOM includes one extra component and the thermal layout must account for diode conduction losses — the trade-off is lower cost and no risk of cross-conduction at light loads. ## Package and compliance Supplied in a tube, the LT3690IUFE#PBF is housed in a 26-WFQFN exposed pad package (26-QFN, 4x6 mm) for surface-mount assembly — the pad must be connected to the ground plane for rated thermal performance. ROHS3 compliant, with no lead, mercury, cadmium, or other restricted substances — suitable for EU and global markets without exemption tracking.","metaTitle":"LT3690IUFE#PBF Buck Regulator, 4A, 36V Input, Active","metaDescription":"Analog Devices LT3690IUFE#PBF step-down regulator, 4 A output, 3.9-36 V input, adjustable output. Active production, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Step-Down","Topology":"Buck","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"26-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Current - Output":"4A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"138kHz ~ 1.5MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"No","Voltage - Input (Max)":"36V","Voltage - Input (Min)":"3.9V","Voltage - Output (Max)":"20V","Supplier Device Package":"26-QFN (4x6)","Voltage - Output (Min/Fixed)":"0.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$13.74","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$13.74000","currency":"USD"},{"qty":10,"price":"$12.63100","currency":"USD"},{"qty":25,"price":"$12.10800","currency":"USD"},{"qty":100,"price":"$10.66800","currency":"USD"},{"qty":250,"price":"$10.14444","currency":"USD"},{"qty":500,"price":"$9.48996","currency":"USD"},{"qty":1000,"price":"$8.70458","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/647665b7359d778311e1f161ceab1abd.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT3690IUFEPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT3690IUFEPBF 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}}