{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT3999HMSE#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT3999HMSEPBF","canonicalUrl":"https://icboms.com/analog-devices/LT3999HMSEPBF","factsUrl":"https://icboms.com/api/mcp/products/LT3999HMSE%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT3999HMSE#PBF push-pull adjustable regulator, 1A output, 2.7-36V input, 50kHz-1MHz switching, 10-MSOP-EP exposed pad, tube.","salesMarkdown":"## Push-pull regulator with 1A output and isolation-ready topology The LT3999HMSE#PBF is a push-pull switching regulator delivering 1A output from a 2.7V to 36V input rail. ## Switching frequency and transformer sizing A lower frequency lets you use a smaller core but needs more turns and a larger inductor; 1MHz shrinks the magnetics but demands careful layout to keep switching losses in check. The adjustable output is set with an external resistor divider, so you dial in exactly the secondary voltage the load needs. No synchronous rectifier is integrated, which means the output stage uses external Schottky diodes. That is standard for isolated push-pull designs — the diode drop adds a few percent loss, but the simplicity and isolation rating are worth the trade-off for many industrial and telecom supplies. ## 150°C junction rating and package thermal path Rated for junction temperatures up to 150°C, the LT3999HMSE#PBF handles hot environments — under-hood automotive, base-station power amps, or sealed enclosures with limited airflow.","metaTitle":"LT3999HMSE#PBF Push-Pull Regulator, 1A, 36V Input, 10-MSOP","metaDescription":"Analog Devices LT3999HMSE#PBF push-pull adjustable regulator, 1A output, 2.7-36V input, 50kHz-1MHz switching. Active production, ROHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Step-Up/Step-Down","Topology":"Push-Pull","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"10-TFSOP, 10-MSOP (0.118\\\", 3.00mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Current - Output":"1A","Number of Outputs":"1","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"50kHz ~ 1MHz","Operating Temperature":"-40°C ~ 150°C (TJ)","Synchronous Rectifier":"No","Voltage - Input (Max)":"36V","Voltage - Input (Min)":"2.7V","Supplier Device Package":"10-MSOP-EP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.71","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$9.71000","currency":"USD"},{"qty":10,"price":"$7.43600","currency":"USD"},{"qty":25,"price":"$6.29960","currency":"USD"},{"qty":50,"price":"$6.19640","currency":"USD"},{"qty":100,"price":"$5.88650","currency":"USD"},{"qty":250,"price":"$5.82456","currency":"USD"},{"qty":500,"price":"$5.74196","currency":"USD"},{"qty":1000,"price":"$5.67999","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum output current of LT3999HMSE#PBF?","answer":"The LT3999HMSE#PBF delivers 1A output current from a single adjustable output. The push-pull topology supports positive or isolated output configurations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT3999HMSEPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT3999HMSEPBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}