{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS628681ARQYR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS628681ARQYR","canonicalUrl":"https://icboms.com/texas-instruments/TPS628681ARQYR","factsUrl":"https://icboms.com/api/mcp/products/TPS628681ARQYR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS628681ARQYR, synchronous step-down buck converter, 4A output, 2.4MHz switching, 2.4V to 5.5V input, programmable output 0.4V to 1.675V, 9-VFQFN package, -40°C to 125°C.","salesMarkdown":"## 4 A synchronous buck for tight rails Its 2.4 MHz switching frequency keeps the inductor small, while the programmable output — from 0.4 V up to 1.675 V — suits low-voltage core and I/O supplies. ## 2.4 MHz switching — inductor size vs. efficiency trade-off At 2.4 MHz, the switching period is about 417 ns. That allows a small-value inductor — typically 0.47 µH to 1 µH — which fits the 9-VFQPN (1.5x2.5 mm) footprint. The trade-off is higher switching losses compared to a 500 kHz part, but for a 4 A rail the efficiency curve peaks in the 1–3 A range where most point-of-load designs operate.","metaTitle":"TPS628681ARQYR 4A Step-Down Buck Converter, 2.4MHz, 9-VFQFN","metaDescription":"Texas Instruments TPS628681ARQYR is a 4A synchronous step-down buck converter in a 9-VFQFN package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Output Type":"Programmable","Mounting Type":"Surface Mount","Package / Case":"9-VFQFN","Product Status":"Active","lifecycle_stage":"eol_hot","Current - Output":"4A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"2.4MHz","Operating Temperature":"-40°C~125°C(TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"5.5V","Voltage - Input (Min)":"2.4V","Voltage - Output (Max)":"1.675V","Supplier Device Package":"9-VQFN-HR (1.5x2.5)","Voltage - Output (Min/Fixed)":"0.4V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.3500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/7ed487ab0f0017eb6aa5c703c343df91.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS628681ARQYR/alternatives.json"},"ai":{"faq":[{"question":"What is the TPS628681ARQYR used for?","answer":"Typical applications include powering low-voltage core rails, I/O supplies, and post-regulation in networking, industrial, and battery-powered equipment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS628681ARQYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS628681ARQYR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}