{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS259540DSGT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS259540DSGT","canonicalUrl":"https://icboms.com/texas-instruments/TPS259540DSGT","factsUrl":"https://icboms.com/api/mcp/products/TPS259540DSGT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS259540DSGT electronic fuse, 2.7V~18V input, 4A output, ±7.5% accuracy, -40°C~125°C, 8-WSON (2x2 mm) package, active.","salesMarkdown":"The TPS259540DSGT is a Texas Instruments electronic fuse that covers the common intermediate bus rails: 3.3 V, 5 V, 12 V, and up to 18 V nominal. The 4 A continuous output rating sets the load budget for the protected rail — budget derating above 85 °C ambient, as the package thermal impedance (exposed pad on 8-WSON 2x2 mm) limits the power dissipation at the high end of the 2.7 V to 18 V input range. ## ±7.5 % current-limit accuracy — tighter than the typical eFuse The ±7.5 % accuracy on the current limit means you can set the threshold closer to the load's maximum draw without tripping on inrush or transient peaks. For a 4 A rail, a ±7.5 % band translates to a ±300 mA window — enough headroom to avoid nuisance trips on most capacitive loads. ## Package and rework — 8-WSON with exposed pad It reflows well with a standard solder profile, but the pad under the part needs a thermal via array to pull heat into the board plane — without it the junction temperature rises fast above 4 A continuous. The 125 °C junction ceiling means the part can run at full 4 A output only if the board-level thermal design keeps the junction below that limit — derate the output current above 85 °C ambient based on the package's thermal resistance.","metaTitle":"TPS259540DSGT eFuse, 2.7V-18V input, 4A, ±7.5% accuracy","metaDescription":"Texas Instruments TPS259540DSGT electronic fuse, 2.7V to 18V input, 4A output, ±7.5% current-limit accuracy, -40°C to 125°C, 8-WSON (2x2 mm).","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)","Accuracy":"±7.5%","Function":"Electronic Fuse","Mounting Type":"Surface Mount","Package / Case":"8-WFDFN Exposed Pad","Product Status":"Active","Sensing Method":"-","Voltage - Input":"2.7V ~ 18V","lifecycle_stage":"eol_hot","Current - Output":"4A","Base Product Number":"TPS259540","Operating Temperature":"-40°C~125°C(TJ)","Supplier Device Package":"8-WSON (2x2)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/617f724dd3d0dc449a8923d1f4b9eccc.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS259540DSGT/alternatives.json"},"ai":{"faq":[{"question":"What is the accuracy of TPS259540DSGT?","answer":"The current-limit accuracy is ±7.5 %, which is tighter than many general-purpose eFuses. This allows a smaller safety margin on the current-limit setpoint."},{"question":"Is TPS259540DSGT compatible with 5V systems?","answer":"Yes, the 2.7 V to 18 V input range covers 5 V nominal rails directly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS259540DSGT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS259540DSGT 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}}