{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS65251RHAR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS65251RHAR","canonicalUrl":"https://icboms.com/texas-instruments/TPS65251RHAR","factsUrl":"https://icboms.com/api/mcp/products/TPS65251RHAR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS65251RHAR triple step-down buck regulator, 3 A / 2 A outputs, adjustable output, 300 kHz to 2.2 MHz switching frequency, -40°C to 125°C, 40-VFQFN exposed pad, surface mount.","salesMarkdown":"## 3 A / 2 A triple buck — what the current rating buys the design The TPS65251RHAR from Texas Instruments is a triple-output step-down (buck) regulator that delivers 3 A on one channel and 2 A on the other two, all from a single 4.5 V to 18 V input rail. The adjustable output down to 0.8 V lets it power a mix of core, I/O, and auxiliary rails in a single-chip power tree. ## Switching frequency range — inductor sizing and ripple trade-off The 300 kHz to 2.2 MHz switching frequency range gives the designer room to choose: lower frequencies improve efficiency at the cost of larger inductors and higher output ripple; higher frequencies shrink the magnetics but increase switching losses. Synchronous rectification keeps the efficiency penalty manageable across the band.","metaTitle":"TPS65251RHAR Triple Buck Regulator, 3 A / 2 A","metaDescription":"Texas Instruments TPS65251RHAR triple step-down buck regulator, 3 A and 2 A outputs, adjustable output down to 0.8 V, 300 kHz to 2.2 MHz switching frequency","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)":"18V","Supplier Device Package":"40-VQFN (6x6)","Voltage - Output (Min/Fixed)":"0.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.8300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/dd91455ea8ac5a113c2f88aaedccc75d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS65251RHAR/alternatives.json"},"ai":{"faq":[{"question":"What is the switching frequency range of TPS65251RHAR?","answer":"The switching frequency is adjustable from 300 kHz to 2.2 MHz, set by an external resistor. This range allows the designer to trade off inductor size against efficiency and output ripple."},{"question":"Does TPS65251RHAR have an adjustable output?","answer":"Yes, the output voltage is adjustable from a minimum of 0.8 V up to the input voltage (18 V max). The output type is positive, and the part uses synchronous rectification for improved efficiency."},{"question":"What is the output current of TPS65251RHAR?","answer":"The three outputs are rated 3 A, 2 A, and 2 A respectively. The 3 A channel typically powers the highest-current rail (e.g., core voltage), while the 2 A channels handle I/O or auxiliary supplies."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS65251RHAR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS65251RHAR 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}}