{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3502SQ-35","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3502SQ-35","canonicalUrl":"https://icboms.com/texas-instruments/LM3502SQ-35","factsUrl":"https://icboms.com/api/mcp/products/LM3502SQ-35","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3502SQ-35 DC-DC boost LED driver, 35V output, 750mA switch, PWM dimming, 1MHz, 16-WQFN, Tape & Reel.","salesMarkdown":"Texas Instruments has marked the LM3502SQ-35 as Obsolete. ## Boost LED driver with integrated switch The LM3502SQ-35 is a DC-DC boost regulator designed for backlight applications. It integrates the power switch internally, delivering up to 35 V output with a 750 mA switch current limit. The 1 MHz switching frequency allows the use of small external inductors and capacitors, keeping the total solution footprint compact. PWM dimming is supported, giving the system designer direct control over LED brightness without varying the DC output level — the PWM signal modulates the on-time of the switch, and the downstream LC filter averages the current to the LED string. Two independent outputs are available, allowing the driver to control two separate LED strings or channels with a common boost stage. ## RoHS compliance note This is a critical check for designs targeting RoHS exemption-free markets or where the BOM must pass a restricted-substance audit. If RoHS compliance is mandatory, a functionally equivalent alternative in a compliant package should be evaluated at the board level.","metaTitle":"Texas Instruments LM3502SQ-35 LED Driver, 35V Boost, 1MHz","metaDescription":"Obsolete TI LM3502SQ-35 DC-DC boost LED driver, 35V output, 750mA switch, PWM dimming, 16-WQFN. Sourced to order against RFQ via independent channels.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Type":"DC DC Regulator","Series":"-","Dimming":"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":"LM3502","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":"$1.6700","priceTiers":[{"qty":180,"price":"$1.67000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6334f3e0ff8c915ac4c9f9522a93a00f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3502SQ-35/alternatives.json"},"ai":{"faq":[{"question":"Can LM3502SQ-35 replace TLC5940RHBR in a backlight design?","answer":"No. The TLC5940RHBR is a 16-channel linear constant-current sink driver with a shift-register interface, while the LM3502SQ-35 is a 2-output boost regulator with PWM dimming. The topologies, output count, and control interfaces are fundamentally different — a direct drop-in replacement is not possible without a board redesign."},{"question":"What compliance documentation does Texas Instruments provide for LM3502SQ-35?","answer":"The part is RoHS non-compliant. No UL, IEC, or REACH documentation is listed in the available records. For compliance verification, the original TI datasheet and any associated material declarations should be consulted."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3502SQ-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/LM3502SQ-35 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T01:13:39.187Z","lastPublished":"2026-07-21T01:13:39.187Z","indexable":true}}