{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3503SQ-35/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3503SQ-35-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM3503SQ-35-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM3503SQ-35%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3503SQ-35/NOPB, DC DC Regulator LED Driver, Step-Up (Boost) topology, 35V output, 1MHz switching, 16-WQFN Exposed Pad.","salesMarkdown":"## Obsolete — sourcing through surplus and broker channels Texas Instruments has marked the LM3503SQ-35/NOPB as Obsolete. RoHS3 compliant per — the part carries the /NOPB suffix indicating lead-free and RoHS-compliant construction. ## Boost regulator with integrated switch and dual outputs A DC-DC step-up (boost) regulator with internal switch rated at 750 mA per channel, driving up to two LED strings at a regulated 35 V output. The 1 MHz switching frequency keeps the external inductor and capacitor small enough for compact backlight assemblies. Supports both analog and PWM dimming — the PWM input allows the host controller to set brightness directly, while the analog control pin adjusts the current sense threshold for a continuous dimming curve. ## 16-WQFN package — board-fit considerations Housed in a 16-lead WFQFN with exposed pad (4 mm × 4 mm body). Surface-mount only; no through-hole variant exists. The 0.50 mm pitch QFN footprint demands careful solder-paste stencil design to avoid bridging between the centre pad and the perimeter leads.","metaTitle":"LM3503SQ-35/NOPB Texas Instruments LED Driver, 35V Boost","metaDescription":"Texas Instruments LM3503SQ-35/NOPB DC-DC boost LED driver, 2.5-5.5V supply, 35V output, 750mA switch, 1MHz, 16-WQFN. Obsolete — sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","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":"$1.3100","priceTiers":[{"qty":229,"price":"$1.31000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3503SQ-35%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What dimming methods does the LM3503SQ-35/NOPB support?","answer":"Both analog and PWM dimming. The PWM input accepts a logic-level signal from the host controller; the analog control pin adjusts the current sense threshold for continuous dimming without a PWM carrier."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3503SQ-35-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/LM3503SQ-35-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T01:14:22.179Z","lastPublished":"2026-07-21T01:14:22.179Z","indexable":true}}