{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS65400RGZR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS65400RGZR","canonicalUrl":"https://icboms.com/texas-instruments/TPS65400RGZR","factsUrl":"https://icboms.com/api/mcp/products/TPS65400RGZR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS65400RGZR, Step-Down Buck, 4 Outputs, Adjustable, 4A/2A, 275kHz~2.2MHz, Surface Mount, 48-VFQFN Exposed Pad, -40°C~125°C.","salesMarkdown":"## Four-rail power manager for space-constrained boards The TPS65400RGZR is a four-output step-down (buck) regulator from TI, packing two 4 A rails and one 2 A rail into a single 48-VFQFN exposed-pad package. That fourth output? A low-current auxiliary rail for sequencing or housekeeping. The adjustable output (0.6 V to 16.2 V) and synchronous rectifier keep the BOM lean — no external Schottky catch diode needed. Input range spans 4.5 V to 18 V, so it handles 5 V, 9 V, 12 V, and 15 V buses without a pre-regulator. The 48-VQFN (7x7 mm) footprint with exposed pad demands a good thermal via pattern under the paddle — the 125 °C junction rating is real, but the board copper carries the heat. ## Switching frequency: trade inductor size for efficiency The programmable switching frequency from 275 kHz to 2.2 MHz lets you optimise the power stage. Run at 275 kHz for best efficiency and lower switching losses; push toward 2.2 MHz to shrink the inductor footprint, at the cost of higher gate-drive losses and tighter layout requirements. The 48-VQFN package's exposed paddle helps pull heat from the high-frequency FETs. TI lists the TPS65400RGZR as Active. No official pin-compatible alternate is listed, so dual-sourcing would require a layout change.","metaTitle":"TPS65400RGZR 4-output buck PMIC, 4A/2A, 275kHz-2.2MHz","metaDescription":"Texas Instruments TPS65400RGZR 4-output step-down regulator. 4A + 2A rails, adjustable output, 275kHz-2.2MHz switching.","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":"48-VFQFN Exposed Pad","Product Status":"Active","lifecycle_stage":"eol_hot","Current - Output":"4A, 2A","Number of Outputs":"4","Base Product Number":"TPS65400","Output Configuration":"Positive","Frequency - Switching":"275kHz ~ 2.2MHz","Operating Temperature":"-40°C~125°C(TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"18V","Voltage - Input (Min)":"4.5V","Voltage - Output (Max)":"16.2V","Supplier Device Package":"48-VQFN (7x7)","Voltage - Output (Min/Fixed)":"0.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.7600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c966479fc24ac192b0ec7f776d6351c4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS65400RGZR/alternatives.json"},"ai":{"faq":[{"question":"How many outputs does TPS65400RGZR have?","answer":"Four outputs: two rated at 4 A and one at 2 A, plus a fourth auxiliary rail. The fourth output current rating is not explicitly listed, but the part provides four regulated rails total."},{"question":"What is the switching frequency of TPS65400RGZR?","answer":"The switching frequency is programmable from 275 kHz to 2.2 MHz, set by an external resistor. This lets you trade efficiency for inductor size."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS65400RGZR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS65400RGZR 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}}