{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX20405AFOD/VY+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX20405AFOD-VY","canonicalUrl":"https://icboms.com/analog-devices/MAX20405AFOD-VY","factsUrl":"https://icboms.com/api/mcp/products/MAX20405AFOD%2FVY%2B","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices MAX20405AFOD/VY+ automotive-grade step-down buck regulator, 5A output, 3V to 36V input, 17-FC2QFN wettable flank package, tray.","salesMarkdown":"## Automotive-grade 5A buck for engine-bay and body-electronics rails The MAX20405AFOD/VY+ is a 5A step-down buck regulator from Analog Devices, qualified to AEC-Q100 Grade 1 — the -40°C to +125°C operating range covers under-hood and cabin electronics where the ambient temperature can hit 105°C on a summer grade and still leave margin. Input voltage spans 3V to 36V, so it starts from a cold-crank battery dipped to 3V and survives a 36V load-dump transient without an external clamp — the internal FET's abs-max rating covers the surge. The single output is programmable from 0.8V up to 10V, with a fixed 3.3V option on the same die, which lets a single BOM line serve both a 3.3V logic rail and a 5V sensor supply by changing the feedback resistor divider. ## Switching frequency trade-off and package integration The switching frequency is pin-strapped to either 400kHz or 2.1MHz — at 400kHz the inductor is physically larger but the switching losses are lower, while 2.1MHz shrinks the inductor footprint at the cost of higher gate-drive loss and tighter layout constraints on the switch node. Synchronous rectification is built in, so the external Schottky diode that a non-synchronous buck needs is eliminated — the low-side FET's Rds(on) replaces the diode forward drop, which pulls efficiency up at heavy loads. The 17-FC2QFN package (3.5mm x 3.75mm) with wettable flank terminals allows automated optical inspection (AOI) of the solder joints after reflow — a requirement for many automotive Tier-1 assembly lines that cannot rely on X-ray sampling alone. ## Active lifecycle and compliance posture ROHS3 compliant (exemption-free per EU 2015/863), which means no restricted substances above the threshold limits — relevant for automotive REACH declarations and end-of-vehicle recycling compliance. The AEC-Q100 qualification covers the full automotive stress suite: temperature cycling, ESD (HBM/CDM), latch-up, and extended reliability testing per AEC-Q100-Rev-H. The PPAP documentation is available through the standard Analog Devices channel.","metaTitle":"MAX20405AFOD/VY+ Analog Devices Buck Regulator, 5A, AEC-Q100","metaDescription":"MAX20405AFOD/VY+ automotive-grade step-down regulator, 5A output, 3-36V input, -40 to +125°C. Active production, ROHS3. Request a quote.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"Automotive, AEC-Q100","Package":"Tray","Function":"Step-Down","Topology":"Buck","Output Type":"Programmable (Fixed)","Mounting Type":"Surface Mount, Wettable Flank","Package / Case":"17-PowerWFQFN","lifecycle_stage":"eol_hot","Current - Output":"5A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"400kHz, 2.1MHz","Operating Temperature":"-40°C ~ 125°C (TA)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"36V","Voltage - Input (Min)":"3V","Voltage - Output (Max)":"10V","Supplier Device Package":"17-FC2QFN (3.5x3.75)","Voltage - Output (Min/Fixed)":"0.8V (3.3V)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.39","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.39000","currency":"USD"},{"qty":10,"price":"$3.68500","currency":"USD"},{"qty":25,"price":"$3.47840","currency":"USD"},{"qty":80,"price":"$2.98150","currency":"USD"},{"qty":420,"price":"$2.81588","currency":"USD"},{"qty":840,"price":"$2.65024","currency":"USD"},{"qty":1260,"price":"$2.26927","currency":"USD"},{"qty":2520,"price":"$2.13676","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9e5f0a385c912b1ecf29f51669d9a50b.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX20405AFOD-VY","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX20405AFOD-VY 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}}