{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VIPER25LN","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"VIPER25LN","canonicalUrl":"https://icboms.com/stmicroelectronics/VIPER25LN","factsUrl":"https://icboms.com/api/mcp/products/VIPER25LN","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics VIPer™ plus VIPER25LN, flyback switching regulator, 20 W output, 800 V breakdown, 136 kHz switching frequency, 7-DIP through-hole package, -40°C to 150°C junction temperature.","salesMarkdown":"## 20 W flyback with 800 V avalanche-rugged MOSFET The STMicroelectronics VIPER25LN is a monolithic flyback switching regulator from the VIPer™ plus family, integrating a 800 V avalanche-rugged power MOSFET and PWM controller in a 7-lead DIP package. It delivers up to 20 W of isolated output power, making it a fit for auxiliary supplies, appliance power stages, and industrial control converters where through-hole assembly is preferred. ## 136 kHz switching — transformer sizing and EMI The 136 kHz switching frequency reduces transformer core volume compared to lower-frequency designs while keeping switching losses manageable at 20 W. The 8.5 V to 23.5 V Vcc range accommodates universal input with a 14 V startup threshold. The VIPER25LN is officially obsolete per STMicroelectronics' lifecycle status. ## Through-hole 7-DIP — rework-friendly package The 7-lead DIP (0.300 inch body) is a through-hole package that reworks cleanly under a soldering iron or hot-air station — no risk of lifting pads like a QFN. The 150 °C junction temperature rating means the part can tolerate brief soldering heat without damage, though the junction-to-ambient thermal resistance of the DIP package limits continuous dissipation without a heatsink or adequate copper area.","metaTitle":"STMicroelectronics VIPER25LN VIPer plus Flyback IC, 20 W","metaDescription":"VIPER25LN is an obsolete 20 W flyback switching regulator from STMicroelectronics VIPer plus series. 800 V breakdown, 136 kHz switching, 7-DIP package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","Series":"VIPer™ plus","Package":"Tube","Topology":"Flyback","Duty Cycle":"-","Mounting Type":"Through Hole","Power (Watts)":"20 W","Package / Case":"8-DIP (0.300\\\", 7.62mm), 7 Leads","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Control Features":"-","Fault Protection":"Current Limiting, Over Temperature, Over Voltage","Output Isolation":"Isolated","Internal Switch(s)":"Yes","Voltage - Start Up":"14 V","Base Product Number":"VIPER25","Voltage - Breakdown":"800V","Frequency - Switching":"136kHz","Operating Temperature":"-40°C ~ 150°C (TJ)","Supplier Device Package":"7-DIP","Voltage - Supply (Vcc/Vdd)":"8.5V ~ 23.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.5600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/40a8ef1f3d7e091642a253958619a129.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/VIPER25LN/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/VIPER25LN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/VIPER25LN 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}}