{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3503SQ-35","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3503SQ-35","canonicalUrl":"https://icboms.com/texas-instruments/LM3503SQ-35","factsUrl":"https://icboms.com/api/mcp/products/LM3503SQ-35","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3503SQ-35, DC DC Regulator, Step-Up (Boost) topology, 35V output, 1MHz switching, 2 outputs, Analog/PWM dimming, 16-WFQFN exposed pad, -40°C to 85°C.","salesMarkdown":"## Boost LED driver with 35 V output ceiling The LM3503SQ-35 is a DC-DC regulator using a step-up (boost) topology, designed primarily for backlight applications. It integrates two outputs with analog and PWM dimming control, switching at 1 MHz to keep the inductor small. Output voltage reaches 35 V. ## Obsolete — plan for replacement New designs should avoid it; existing BOM lines will need to source from surplus or broker channels. The 16-WFQFN package with exposed pad (4x4 mm) is a standard footprint, so a pin-compatible drop-in from another manufacturer is unlikely without a layout change. Verify the pinout against any proposed alternative before committing.","metaTitle":"LM3503SQ-35 DC DC Regulator, 35V Output, 1MHz Boost","metaDescription":"LM3503SQ-35 DC DC Regulator, step-up boost topology, 35V output, 1MHz switching, 2-channel analog/PWM dimming. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Type":"DC DC Regulator","Series":"-","Dimming":"Analog, PWM","Package":"Tape & Reel (TR); Cut Tape (CT)","Topology":"Step-Up (Boost)","Frequency":"1MHz","Applications":"Backlight","Mounting Type":"Surface Mount","Package / Case":"16-WFQFN Exposed Pad","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Voltage - Output":"35V","Number of Outputs":"2","Internal Switch(s)":"Yes","Base Product Number":"LM3503","Operating Temperature":"-40°C~85°C(TA)","Voltage - Supply (Max)":"5.5V","Voltage - Supply (Min)":"2.5V","Supplier Device Package":"16-WQFN (4x4)","Current - Output / Channel":"750mA (Switch)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.5100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b5f4b20f44a7c0b93377b093bbaea4ad.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3503SQ-35/alternatives.json"},"ai":{"faq":[{"question":"What is the equivalent of LM3503SQ-35?","answer":"No direct pin-compatible equivalent is documented. The part is obsolete without a successor, so any replacement will require a PCB layout change and revalidation of the boost converter parameters."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3503SQ-35","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3503SQ-35 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}}