{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT8640IUDCF#TRPBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT8640IUDCFTRPBF","canonicalUrl":"https://icboms.com/analog-devices/LT8640IUDCFTRPBF","factsUrl":"https://icboms.com/api/mcp/products/LT8640IUDCF%23TRPBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices Silent Switcher®1 series, LT8640IUDCF#TRPBF, Step-Down Buck, Adjustable Output, 5A, 3.4V–42V Input, 210kHz–2MHz Switching, -40°C–125°C, 20-QFN (3x4) Wettable Flank, Tape & Reel.","salesMarkdown":"## Wide-input buck for 5A rails — the Silent Switcher®1 trade-off The Analog Devices LT8640IUDCF#TRPBF is a step-down switching regulator from the Silent Switcher®1 family, designed to deliver up to 5A from a 3.4V to 42V input rail. It integrates the synchronous rectifier, so the external BOM stays lean — just the inductor, input/output caps, and feedback divider. The adjustable switching frequency from 210kHz to 2MHz lets you optimise for efficiency (lower frequency) or inductor size (higher frequency). The 20-QFN (3x4) package with wettable flank supports automated optical inspection, which is useful for production lines that rely on AOI after reflow. ## 42V input, 5A output — where the headroom matters The 42V maximum input covers 24V industrial rails with margin for transients, as well as 12V automotive systems that see load-dump spikes. The 5A continuous output is enough for FPGAs, processors, or multiple downstream LDOs. Because the part is rated for junction temperatures up to 125°C, it can run in sealed enclosures or under-hood environments without derating the output current. The adjustable output down to 0.97V means it can power low-voltage cores directly. There is no last-time-buy clock running.","metaTitle":"LT8640IUDCF#TRPBF Silent Switcher®1 Buck Regulator, 5A","metaDescription":"Analog Devices LT8640IUDCF#TRPBF step-down buck regulator, 3.4V to 42V input, 5A output, adjustable frequency 210kHz–2MHz, -40°C to 125°C, 20-QFN.","metaKeywords":null},"attributes":{"series":"Silent Switcher®1","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"Silent Switcher®1","Package":"Tape & Reel (TR)","Function":"Step-Down","Topology":"Buck","Output Type":"Adjustable","Mounting Type":"Surface Mount, Wettable Flank","Package / Case":"20-WFQFN, 18 Leads, Exposed Pad","lifecycle_stage":"eol_hot","Current - Output":"5A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"210kHz ~ 2MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"42V","Voltage - Input (Min)":"3.4V","Voltage - Output (Max)":"42V","Supplier Device Package":"20-QFN (3x4)","Voltage - Output (Min/Fixed)":"0.97V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.01536","stockQuantity":0,"priceTiers":[{"qty":2500,"price":"$8.01536","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/LT8640-8640-1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the output current capability of the LT8640IUDCF#TRPBF?","answer":"It delivers up to 5A continuous output."},{"question":"How does the LT8640IUDCF#TRPBF differ from the LT8640IUDCF#PBF?","answer":"The silicon and electrical ratings are identical. The only difference is the shipping medium: #TRPBF is Tape & Reel for automated assembly lines, while #PBF is tray-packaged. Choose the carrier that matches your floor's feeder setup."},{"question":"Does the LT8640IUDCF require external compensation?","answer":"No. The LT8640IUDCF uses internal compensation, so the feedback loop is stable with the recommended output capacitor values listed in the datasheet. That simplifies the design and saves one or two external components."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT8640IUDCFTRPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT8640IUDCFTRPBF 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}}