{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX17681AATB+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX17681AATBT","canonicalUrl":"https://icboms.com/analog-devices/MAX17681AATBT","factsUrl":"https://icboms.com/api/mcp/products/MAX17681AATB%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices MAX17681AATB+T, Step-Down Buck Regulator, Adjustable Output, 200kHz Switching, 4.5V to 42V Input, -40°C to 125°C, 10-TDFN (3x2) Surface Mount.","salesMarkdown":"## What this part is and where it fits The MAX17681AATB+T is a step-down (buck) switching regulator from Analog Devices, built for industrial and automotive power rails. It takes a wide input from 4.5 V up to 42 V and delivers an adjustable output down to 0.9 V, with a single output rated for positive, isolation-capable configurations. The 200 kHz switching frequency is fixed, so the inductor and output capacitor values are predictable — no frequency-sync headaches on a shared bus. Synchronous rectification is built in, which keeps the external diode count at zero and the efficiency curve reasonable across load. The 10-TDFN (3x2 mm) exposed-pad package is small enough for space-constrained boards but needs a solid thermal via plan to pull heat out. Rated for -40°C to 125°C ambient, it will sit comfortably in an engine bay or a motor-drive enclosure. ## Isolation-capable — what that means in practice The 'Positive, Isolation Capable' output configuration means the controller can be wired as a flyback converter with a coupled inductor or transformer to produce an isolated output. This is not a fully integrated isolated module — you still need the transformer, feedback optocoupler, and secondary-side reference — but the controller itself supports the topology. If you need a simple non-isolated buck, it works just as well without the isolation components. The synchronous rectifier helps efficiency on the primary side, but in an isolated design the secondary-side rectification is external. For a quick field swap, the 10-TDFN package is small but the exposed pad requires a reflow profile — not a hand-solder-friendly part unless you have a hot-air station and a steady hand. Keep a stencil or pre-tinned pad in the kit if you plan to replace this on site. ## Lifecycle and compliance It is ROHS3 compliant, which covers the current EU RoHS directive without exemptions.","metaTitle":"MAX17681AATB+T Step-Down Buck Regulator, 4.5V-42V Input","metaDescription":"MAX17681AATB+T is a 200kHz adjustable step-down buck regulator from Analog Devices. Wide 4.5V-42V input, -40°C to 125°C range, isolation-capable. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"10-WFDFN Exposed Pad","lifecycle_stage":"eol_hot","Number of Outputs":"1","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"200kHz","Operating Temperature":"-40°C ~ 125°C (TA)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"42V","Voltage - Input (Min)":"4.5V","Voltage - Output (Max)":"40.32V","Supplier Device Package":"10-TDFN (3x2)","Voltage - Output (Min/Fixed)":"0.9V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.33","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.33000","currency":"USD"},{"qty":10,"price":"$3.88800","currency":"USD"},{"qty":25,"price":"$3.67520","currency":"USD"},{"qty":100,"price":"$3.18520","currency":"USD"},{"qty":250,"price":"$3.02184","currency":"USD"},{"qty":500,"price":"$2.71150","currency":"USD"},{"qty":1000,"price":"$2.28681","currency":"USD"},{"qty":2500,"price":"$2.17246","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX17681.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can MAX17681AATB+T be used in isolated power supply designs?","answer":"Yes. The output configuration is listed as 'Positive, Isolation Capable', meaning the controller can be configured as a flyback converter for isolated outputs. You will need an external transformer and feedback components."},{"question":"Is MAX17681AATB+T RoHS compliant?","answer":"Yes, it is ROHS3 Compliant, covering the current EU RoHS directive without exemptions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX17681AATBT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX17681AATBT 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}}