{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER115HSTR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER115HSTR","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER115HSTR","factsUrl":"https://icboms.com/api/mcp/products/VIPER115HSTR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPER™ series VIPER115HSTR offline switching regulator, 800V breakdown, 12W output power, 120kHz switching frequency, buck/buck-boost/flyback topology, 10-SSOP package, -40°C~125°C junction temperature.","salesMarkdown":"## Offline switcher with 800 V MOSFET — one part, three topologies The STMicroelectronics VIPER115HSTR is an offline switching regulator from the VIPER™ family that integrates a power MOSFET with an 800 V breakdown rating and a PWM controller in a single 10-SSOP package. It handles buck, buck-boost, and flyback topologies, so a single BOM line can serve multiple offline converter designs — useful when you are kitting for several board variants off one reel. The 12 W output power rating sets the practical design limit for a non-isolated flyback or buck in this package. Above that the junction temperature and inductor size push you to a bigger package or an external switch. The 120 kHz switching frequency is a middle ground — fast enough to shrink the magnetics compared to 65 kHz designs, but not so fast that the MOSFET switching losses dominate the thermal budget. The 80% duty cycle ceiling gives enough on-time for a buck from a 375 VDC rail down to a 12 V output without skipping cycles. Built-in fault protection — current limiting, overload, overvoltage, and short circuit — means the BOM does not need an external supervisor IC or crowbar circuit. That saves two passives and a bit of board area, which matters when you are laying out a compact 10-SSOP design. The start-up voltage is 16 V, and the Vcc range runs from 4.5 V to 30 V once the auxiliary winding takes over. That wide supply range gives flexibility for the bias winding design — you can set the auxiliary voltage anywhere in that band without an extra linear regulator. No lab bench needed for assembly; a standard reflow profile works.","metaTitle":"STMicroelectronics VIPER115HSTR offline switcher, 800V, 12W","metaDescription":"VIPER115HSTR offline switching regulator from STMicroelectronics VIPER™ series. 800V breakdown, 12W output, 120kHz switching, buck/buck-boost/flyback.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","Series":"VIPER™","Package":"Tape & Reel (TR); Cut Tape (CT)","Topology":"Buck, Buck-Boost, Flyback","Duty Cycle":"80%","Mounting Type":"Surface Mount","Power (Watts)":"12 W","Package / Case":"10-SOP (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"Soft Start","Fault Protection":"Current Limiting, Over Load, Over Voltage, Short Circuit","Output Isolation":"Non-Isolated","Internal Switch(s)":"Yes","Voltage - Start Up":"16 V","Base Product Number":"VIPER115","Voltage - Breakdown":"800V","Frequency - Switching":"120kHz","Operating Temperature":"-40°C~125°C(TJ)","Supplier Device Package":"10-SSOP","Voltage - Supply (Vcc/Vdd)":"4.5V ~ 30V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.5600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/70c47f40c5ce2bff38b9362cfb539e0d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER115HSTR/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum output power and input voltage range of VIPER115HSTR?","answer":"The output power ceiling is 12 W. The input voltage range is defined by the 800 V breakdown rating on the drain — that covers rectified mains up to 375 VDC nominal plus line surge margin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER115HSTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER115HSTR 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}}