{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3503SQ-44/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3503SQ-44-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM3503SQ-44-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM3503SQ-44%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3503SQ-44/NOPB, DC DC Regulator, Step-Up (Boost) topology, 1 MHz switching frequency, 44 V output, 2 channels, 750 mA (switch) current, Analog and PWM dimming, 16-WFQFN exposed pad package, industrial temperature range -40°C to 85°C.","salesMarkdown":"## 1 MHz boost regulator for backlight LED drive The LM3503SQ-44/NOPB is a DC DC Regulator from Texas Instruments using a Step-Up (Boost) topology, switching at 1 MHz to drive LED backlight strings. It delivers up to 44 V output across two channels, each capable of 750 mA (switch) current, with both Analog and PWM dimming control for brightness adjustment. No official successor is named in the available records. Housed in a 16-WFQFN Exposed Pad package (supplier device package 16-WQFN 4x4 mm), the part requires a surface-mount assembly process.","metaTitle":"LM3503SQ-44/NOPB Texas Instruments LED Driver, Obsolete","metaDescription":"Texas Instruments LM3503SQ-44/NOPB DC DC Regulator, 1 MHz boost, 44 V output, 2 channels, analog/PWM dimming. Obsolete — sourced per RFQ.","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":"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":"$1.1900","priceTiers":[{"qty":254,"price":"$1.19000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3503SQ-44%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is a good replacement for LM3503SQ-44/NOPB?","answer":"No official replacement is listed in the available records. A functional peer is the LM2703MF-ADJ/NOPB, also a DC DC Regulator boost converter for backlight, but it offers a single output channel at 0.35 A switch current versus the LM3503SQ-44/NOPB's two channels at 750 mA. Verify the output current and channel count against your load before substituting."},{"question":"Does LM3503SQ-44/NOPB support PWM dimming?","answer":"Yes. The device supports both Analog and PWM dimming methods."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3503SQ-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/LM3503SQ-44-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T17:53:00.312Z","lastPublished":"2026-07-17T17:53:00.312Z","indexable":true}}