{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER122LSTR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER122LSTR","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER122LSTR","factsUrl":"https://icboms.com/api/mcp/products/VIPER122LSTR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPER122LSTR offline switching regulator, 11 W, 730 V breakdown, 60 kHz fixed-frequency PWM, buck/buck-boost/flyback, SSOP-10, active.","salesMarkdown":"## 11 W offline switcher with 730 V internal MOSFET The STMicroelectronics VIPER122LSTR is a monolithic offline switching regulator that integrates a 730 V avalanche-rugged power MOSFET and a PWM controller in a single SSOP-10 package. It delivers up to 11 W across buck, buck-boost, or flyback topologies — one part covers isolated and non-isolated rails up to that power ceiling. Switching at a fixed 60 kHz, the internal oscillator sets the EMI signature and transformer magnetising inductance without external timing components. The 80 % duty cycle ceiling gives headroom for wide-input flyback designs at low line. At 60 kHz the core volume and winding turns for a flyback transformer at 11 W are small enough to fit an RM8 or EP13 core — a known sweet spot for offline auxiliary supplies. The fixed frequency also simplifies conducted EMI filtering because the fundamental and its harmonics sit at predictable frequencies.","metaTitle":"VIPER122LSTR Offline Switcher, 11W, 730V, 60kHz, Active","metaDescription":"STMicroelectronics VIPER122LSTR offline switching regulator. 11 W output, 730 V breakdown, 60 kHz fixed frequency. 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":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Topology":"Buck, Buck-Boost, Flyback","Duty Cycle":"80%","Mounting Type":"Surface Mount","Power (Watts)":"11 W","Package / Case":"10-SOP (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Fault Protection":"Current Limiting, Short Circuit","Output Isolation":"Either","Internal Switch(s)":"Yes","Voltage - Start Up":"13 V","Base Product Number":"VIPER122","Voltage - Breakdown":"730V","Frequency - Switching":"60kHz","Operating Temperature":"-40°C~150°C(TJ)","Supplier Device Package":"10-SSOP","Voltage - Supply (Vcc/Vdd)":"11.5V ~ 23.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e1f397e6e262fee5cc72cceebb151dcb.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER122LSTR/alternatives.json"},"ai":{"faq":[{"question":"Can VIPER122LSTR be used in a flyback converter design at 11W?","answer":"Yes. The VIPER122LSTR is rated for 11 W output and explicitly supports flyback topology. The 730 V breakdown MOSFET handles universal AC input (85-265 VAC) with margin, and the 60 kHz fixed frequency suits a standard flyback transformer design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER122LSTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER122LSTR 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}}