{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3503SQ-25/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3503SQ-25-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM3503SQ-25-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM3503SQ-25%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3503SQ-25/NOPB, DC DC Regulator, Step-Up (Boost) topology, 25V output, 1MHz switching, Analog and PWM dimming, dual outputs, 600mA switch, 16-WQFN (4x4) package.","salesMarkdown":"## Boost LED driver with dual outputs and 25V rail The Texas Instruments LM3503SQ-25/NOPB is a DC DC Regulator using a Step-Up (Boost) topology, designed primarily for backlight applications. It delivers a regulated 25V output from a 2.5V to 5.5V supply, with two independent outputs each capable of driving separate LED strings. Each output channel supports a 600mA integrated switch, and the part operates at a 1MHz switching frequency, allowing the use of small external inductors and capacitors. ## Dimming flexibility and package footprint The LM3503SQ-25/NOPB supports both Analog and PWM dimming methods, giving the backlight designer control over brightness without trade-offs in colour temperature or flicker. The PWM dimming input accepts a standard logic-level signal, making it straightforward to interface with a microcontroller or timing controller. Housed in a 16-WFQFN Exposed Pad package (4x4mm body, WQFN), the part is surface-mount and requires a thermal pad connection to the PCB ground plane for effective heat dissipation. New designs should not target this part. No official replacement part is listed by TI on this record.","metaTitle":"LM3503SQ-25/NOPB DC DC Regulator, 25V Boost","metaDescription":"Texas Instruments LM3503SQ-25/NOPB DC DC Regulator, Step-Up (Boost) topology, 25V output, 1MHz, Analog/PWM dimming, 2 outputs.","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":"25V","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":"600mA (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/LM3503SQ-25%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM3503SQ-25/NOPB?","answer":"No official replacement part is listed on the record for this MPN. For existing designs, the part can be sourced through independent distribution against an RFQ; for new designs, a different boost LED driver with similar specifications should be selected."},{"question":"Does LM3503SQ-25/NOPB support PWM dimming?","answer":"Yes, the LM3503SQ-25/NOPB supports both Analog and PWM dimming methods, giving flexibility in backlight brightness control."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3503SQ-25-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-25-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}}