{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX16821CATI+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX16821CATI","canonicalUrl":"https://icboms.com/analog-devices/MAX16821CATI","factsUrl":"https://icboms.com/api/mcp/products/MAX16821CATI%2B","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices MAX16821CATI+, DC DC Controller, PWM Dimming, Topology SEPIC/Buck/Boost, Frequency 125kHz ~ 1.5MHz, Supply 4.75V ~ 28V, -40°C ~ 125°C, 28-TQFN (5x5mm), Active.","salesMarkdown":"## What it is and where it fits The MAX16821CATI+ is a DC DC controller from Analog Devices, purpose-built for driving LED strings in backlight applications. It is a controller, not a converter with integrated switches — the external MOSFETs handle the power stage, which gives you flexibility to scale the output current and voltage for different LED array sizes. The part supports SEPIC, step-down (buck), and step-up (boost) topologies, so it can regulate a LED string above or below the input rail depending on the layout. PWM dimming is built in, which means you can vary LED brightness by modulating the on-time of the external switch at a frequency independent of the switching regulator loop. That keeps colour temperature stable across the dimming range — important for display backlights and architectural lighting where consistent CCT matters. The switching frequency can be set between 125 kHz and 1.5 MHz. Lower frequencies reduce switching losses and help with thermal management on a tight board; higher frequencies shrink the inductor and capacitor values, saving board area. Pick the sweet spot for your efficiency versus size trade-off. ## Supply and temperature — what the ratings mean for the BOM Input voltage range is 4.75 V to 28 V. Operating temperature spans -40°C to 125°C, which qualifies it for under-hood automotive, outdoor LED signage, and industrial enclosures where ambient can climb. The exposed pad on the 28-TQFN (5x5 mm) package helps pull heat into the PCB ground plane — make sure your layout includes a thermal via array under the pad to keep the junction temperature within limits at full load. ## Lifecycle and sourcing The MAX16821CATI+ is listed as Active with ROHS3 compliance.","metaTitle":"MAX16821CATI+ LED Driver DC DC Controller, PWM Dimming","metaDescription":"MAX16821CATI+ is an active LED driver DC DC controller from Analog Devices.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"DC DC Controller","Dimming":"PWM","Package":"Tube","Topology":"SEPIC, Step-Down (Buck), Step-Up (Boost)","Frequency":"125kHz ~ 1.5MHz","Applications":"Backlight","Mounting Type":"Surface Mount","Package / Case":"28-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Number of Outputs":"1","Internal Switch(s)":"No","Operating Temperature":"-40°C ~ 125°C (TA)","Voltage - Supply (Max)":"28V","Voltage - Supply (Min)":"4.75V","Supplier Device Package":"28-TQFN (5x5)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.68","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.68000","currency":"USD"},{"qty":10,"price":"$6.03700","currency":"USD"},{"qty":25,"price":"$5.75600","currency":"USD"},{"qty":100,"price":"$4.99790","currency":"USD"},{"qty":250,"price":"$4.77328","currency":"USD"},{"qty":500,"price":"$4.35208","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX16821-MAX16821C.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is MAX16821CATI+'s listed type and dimming method?","answer":"The MAX16821CATI+ is a DC DC Controller with PWM dimming, designed for LED backlight applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX16821CATI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX16821CATI 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}}