{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS61391RTET","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS61391RTET","canonicalUrl":"https://icboms.com/texas-instruments/TPS61391RTET","factsUrl":"https://icboms.com/api/mcp/products/TPS61391RTET","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS61391RTET, Step-Up Boost Converter, Adjustable Output 20V to 85V, 2.5V to 5.5V Input, 700kHz Switching, 16-WQFN (3x3) Exposed Pad, -40°C to 125°C.","salesMarkdown":"## 85 V output from a 3×3 mm QFN That 85 V ceiling is the headline — you do not see that kind of boost ratio in a 16-pin WQFN package every day. It is meant for applications that need a high-voltage bias rail from a low-voltage source: LCD bias, PMOLED panels, avalanche photodiode bias, or piezo actuator supplies. ## Switching frequency and rectifier choice Switching frequency is fixed at 700 kHz. That is fast enough to keep the inductor small — a 4.7 µH to 10 µH part in the 0805 or 1210 footprint works — but not so fast that layout parasitics dominate the loop. The part uses an external diode (no synchronous rectifier), which means the efficiency peak sits at moderate loads and the BOM gets a Schottky diode rated for the output voltage plus margin. For an 85 V output, that means a 100 V Schottky or ultrafast diode in a SMA or SMB package. The 16-WFQFN with exposed pad (3×3 mm body) is a QFN — no leads to inspect, so you rely on the solder-paste volume and the reflow profile. A preheat from the bottom at 100–120 °C helps the pad wet before the pins. ## Temperature grade and operating range That is the full industrial range with headroom for self-heating. The 125°C junction limit means the part can sit in an engine bay or outdoor enclosure as long as the ambient plus the temperature rise from the power dissipation stays under that ceiling. At high output voltage and current, the external diode and the inductor handle most of the heat, but the QFN's exposed pad still needs a solid thermal connection to the board.","metaTitle":"TPS61391RTET Boost Converter, 85V Output, 16-WQFN","metaDescription":"TPS61391RTET step-up boost converter from Texas Instruments. 2.5V to 5.5V input, adjustable output up to 85V, 700kHz switching, -40°C 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-Up","Topology":"Boost","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"16-WFQFN Exposed Pad","Product Status":"Active","lifecycle_stage":"eol_hot","Current - Output":"-","Number of Outputs":"1","Base Product Number":"TPS61391","Output Configuration":"Positive","Frequency - Switching":"700kHz","Operating Temperature":"-40°C~125°C(TJ)","Synchronous Rectifier":"No","Voltage - Input (Max)":"5.5V","Voltage - Input (Min)":"2.5V","Voltage - Output (Max)":"85V","Supplier Device Package":"16-WQFN (3x3)","Voltage - Output (Min/Fixed)":"20V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.4500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/65c6862d8edb784b4caf488b3002ea9f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS61391RTET/alternatives.json"},"ai":{"faq":[{"question":"How does TPS61391RTET compare to TPS61391RTE?","answer":"The TPS61391RTE is the same base device in a different reel option. The RTET suffix indicates Tape & Reel packaging; the RTE suffix is the standard reel. The die and the electrical specifications are identical. The choice is purely a logistics preference for the pick-and-place line."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS61391RTET","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS61391RTET 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}}