{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS65251-2RHAT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS65251-2RHAT","canonicalUrl":"https://icboms.com/texas-instruments/TPS65251-2RHAT","factsUrl":"https://icboms.com/api/mcp/products/TPS65251-2RHAT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS65251-2RHAT, triple-output step-down buck regulator, 3A + 2A adjustable outputs, 4.5V to 18V input, 300kHz to 2.2MHz switching, 40-VFQFN exposed pad, -40°C to 125°C junction temperature.","salesMarkdown":"## Triple buck with asymmetric rail currents The TPS65251-2RHAT is a three-channel synchronous buck regulator from Texas Instruments, configured as a step-down converter with adjustable outputs. One channel delivers 3 A, the other two 2 A each — a split that maps directly to multi-rail systems where the core logic rail pulls more current than the I/O or auxiliary supply. The minimum output is 0.8 V, adjustable up to 17 V, with synchronous rectification on all three channels. ## Switching frequency: inductor size vs efficiency trade At the low end, efficiency peaks and the inductor core losses drop — useful when the BOM has room for a larger 10 µH or 15 µH coil. At 2.2 MHz, the inductor shrinks to the 1 µH to 2.2 µH range, saving board area at the cost of higher switching losses in the FETs. The designer picks the frequency, not the part. ## 40-VQFN: rework and thermal reality Housed in a 40-VFQFN with exposed pad, 6x6 mm body. The thermal pad under the part is the primary heat path — the board footprint must have a matching copper land with vias to the inner ground plane. Reworking a QFN this size is routine with a hot-air station if the pad layout is correct; the exposed pad centre-tab is the only alignment challenge. Pin 1 corner is marked on the top moulding — verify orientation before placement. The wide temp range means the regulator can sit next to a hot processor or power stage without losing regulation. ## Sourcing posture No official cross-reference or second-source alternate is listed, so the BOM relies on this single MPN for the triple-buck function.","metaTitle":"TPS65251-2RHAT triple buck regulator, 3A/2A, 4.5-18V input","metaDescription":"Texas Instruments TPS65251-2RHAT triple step-down buck regulator. 3A + 2A adjustable outputs, 300kHz-2.2MHz switching, -40 to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"40-VFQFN Exposed Pad","Product Status":"Active","lifecycle_stage":"eol_hot","Current - Output":"3A, 2A","Number of Outputs":"3","Base Product Number":"TPS65251","Output Configuration":"Positive","Frequency - Switching":"300kHz ~ 2.2MHz","Operating Temperature":"-40°C~125°C(TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"18V","Voltage - Input (Min)":"4.5V","Voltage - Output (Max)":"17V","Supplier Device Package":"40-VQFN (6x6)","Voltage - Output (Min/Fixed)":"0.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.6455","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e353daf2958e0545163094d83a42490c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS65251-2RHAT/alternatives.json"},"ai":{"faq":[{"question":"Does TPS65251-2RHAT support adjustable output voltage?","answer":"Yes, all three outputs are adjustable. The minimum output voltage is 0.8 V, and the maximum is 17 V, set by an external resistor divider on each channel."},{"question":"Can TPS65251-2RHAT replace TPS65251-1?","answer":"Both parts share the same base product number TPS65251 and the same 40-VFQFN package. The suffix difference (-1 vs -2) typically indicates a variant in switching frequency range or sequencing options — confirm the specific parametric differences in the datasheet before substituting in an existing BOM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS65251-2RHAT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS65251-2RHAT 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}}