{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3503SQX-44/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3503SQX-44-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM3503SQX-44-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM3503SQX-44%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3503SQX-44/NOPB, DC-DC Regulator, Step-Up (Boost), 44V Output, 1 MHz, 2 Outputs, 750 mA Switch, 16-WFQFN, -40°C to 85°C.","salesMarkdown":"## 44 V boost output for LED backlight strings This is a step-up (boost) DC-DC regulator for backlight applications, delivering a regulated output up to 44 V. Two independent outputs are provided, each with analog and PWM dimming capability. This allows separate brightness control for dual-zone backlighting or driving two LED strings with different current profiles from a single IC. ## Switching frequency and switch current Housed in a 16-lead WFQFN with exposed pad (4 mm × 4 mm body).","metaTitle":"LM3503SQX-44/NOPB DC-DC Regulator, 44V Boost, 1 MHz","metaDescription":"Texas Instruments LM3503SQX-44/NOPB is a 44V boost DC-DC regulator with two outputs, analog and PWM dimming, 1 MHz switching, and 750 mA switch current.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["DC-DC Power Modules"],"specifications":{"Mfr":"Texas Instruments","Type":"DC DC Regulator","Series":"-","Dimming":"Analog, PWM","Package":"Tape & Reel (TR)","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":"44V","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b5f4b20f44a7c0b93377b093bbaea4ad.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3503SQX-44%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM3503SQX-44/NOPB?","answer":"No official successor part is listed by Texas Instruments. For a pin-compatible alternative, evaluate other devices in the LM3503 family (base product number LM3503) that may still be in production — verify the output voltage option and package variant against your BOM. For new designs, consider a current-production boost LED driver from TI's catalog with similar 44 V output and dual-channel dimming capability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3503SQX-44-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3503SQX-44-NOPB 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}}