{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SG3525AP","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"SG3525AP","canonicalUrl":"https://icboms.com/stmicroelectronics/SG3525AP","factsUrl":"https://icboms.com/api/mcp/products/SG3525AP","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics SG3525AP PWM controller, step-down/step-up/step-down function, buck and push-pull topology, 100Hz~400kHz switching frequency, 49% max duty cycle, 8V~35V supply, 16-SOIC package, 0°C~70°C operating temperature.","salesMarkdown":"## What the 49% duty cycle ceiling means for your transformer The SG3525AP is a fixed-frequency PWM controller from STMicroelectronics, built for push-pull and buck topologies where the 49% maximum duty cycle prevents flux walking in the transformer core. At 49%, the off-time guarantees core reset before the next cycle — skip the dead-time calculation on a half-bridge or push-pull design. Two complementary outputs drive the primary-side MOSFETs directly, with a transistor driver stage rated for the full 8V to 35V supply range. The 100Hz to 400kHz switching window covers line-frequency inverters at the low end and compact DC-DC converters at the high end. ## Supply rails and temperature — the fit check The 8V to 35V Vcc range lets this part run off a 12V or 24V industrial bus without a pre-regulator. Below 8V the undervoltage lockout holds the outputs off; above 35V you need a clamp or a different controller. If the board lives in a motor drive enclosure or under-hood, step to the industrial-grade SG3525A variants. No last-time-buy notice, no end-of-life window. The 16-SOIC package (0.154-inch body width, 3.90mm) is the standard narrow-body SOIC-16 footprint.","metaTitle":"SG3525AP PWM Controller, 100Hz-400kHz, 49% Duty Cycle","metaDescription":"STMicroelectronics SG3525AP PWM controller. 8V-35V supply, 100Hz-400kHz switching, 49% max duty cycle. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","Series":"-","Package":"Tube","Function":"Step-Down, Step-Up/Step-Down","Topology":"Buck, Push-Pull","Clock Sync":"Yes","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"Enable, Soft Start","Duty Cycle (Max)":"49%","Number of Outputs":"2","Serial Interfaces":"-","Base Product Number":"SG3525","Output Configuration":"Positive","Frequency - Switching":"100Hz ~ 400kHz","Operating Temperature":"0°C~70°C(TA)","Synchronous Rectifier":"Yes","Supplier Device Package":"16-SO","Voltage - Supply (Vcc/Vdd)":"8V ~ 35V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.5400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1230eec92d96e859a8417e6d9cf22bc4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SG3525AP/alternatives.json"},"ai":{"faq":[{"question":"What is the SG3525AP maximum duty cycle?","answer":"The SG3525AP has a maximum duty cycle of 49%. This is a hard limit set by the on-chip dead-time control to prevent transformer saturation in push-pull and half-bridge topologies."},{"question":"What is the closest pin-compatible alternative to the SG3525AP?","answer":"The SG3525AP is pin-compatible with the standard SG3525A family in the same SOIC-16 package. The SG3525AN (DIP-16) shares the same function but a different footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/SG3525AP","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/SG3525AP 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}}