{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS54329DDA","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS54329DDA","canonicalUrl":"https://icboms.com/texas-instruments/TPS54329DDA","factsUrl":"https://icboms.com/api/mcp/products/TPS54329DDA","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments D-CAP2™ series, TPS54329DDA step-down buck regulator, adjustable output, 3A, 650kHz switching, 8-PowerSOIC with PowerPad, surface mount, tube.","salesMarkdown":"## 3A buck for 5V and 12V rails The TPS54329DDA is a single-output step-down buck converter from Texas Instruments' D-CAP2™ family, delivering up to 3 A from a 4.5 V to 18 V input rail. That input window covers common 5 V and 12 V intermediate buses, plus unregulated supplies from 2-cell Li-ion stacks up to 18 V. ## Output voltage range and synchronous rectification The adjustable output can be set from 0.76 V up to 7 V via an external resistor divider. The 0.76 V floor makes it suitable for powering low-voltage core rails on MCUs and FPGAs that require sub-1 V supplies. The integrated synchronous rectifier eliminates the external Schottky diode that older non-synchronous bucks need. This improves efficiency at high step-down ratios — for example, 12 V in to 1.2 V out — where the freewheeling diode's forward drop would otherwise dominate conduction losses. ## Thermal and layout considerations The datasheet's recommended footprint uses a 3×3 array of 0.3 mm vias under the pad; without them, the junction-to-board thermal resistance rises significantly and the 3 A continuous rating may not be achievable at 85 °C ambient. The part is ROHS3 compliant, which means it meets the current EU RoHS exemption limits for lead-free soldering processes.","metaTitle":"TPS54329DDA Texas Instruments Buck Regulator, 3A, 650kHz","metaDescription":"Texas Instruments TPS54329DDA step-down buck regulator, 3A output, 650kHz switching, 4.5-18V input. Active production, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":"D-CAP2™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"D-CAP2™","Package":"Tube","Function":"Step-Down","Topology":"Buck","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"8-PowerSOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Current - Output":"3A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"650kHz","Operating Temperature":"-40°C ~ 85°C (TA)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"18V","Voltage - Input (Min)":"4.5V","Voltage - Output (Max)":"7V","Supplier Device Package":"8-SO PowerPad","Voltage - Output (Min/Fixed)":"0.76V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.07","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.07000","currency":"USD"},{"qty":10,"price":"$1.86000","currency":"USD"},{"qty":25,"price":"$1.75440","currency":"USD"},{"qty":100,"price":"$1.49470","currency":"USD"},{"qty":250,"price":"$1.40344","currency":"USD"},{"qty":500,"price":"$1.22800","currency":"USD"},{"qty":1000,"price":"$1.01749","currency":"USD"},{"qty":2500,"price":"$0.99300","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5c6a095e6310e4a5332ef8e3635547c6.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS54329DDA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS54329DDA when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}