{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3519MK-20/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3519MK-20-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM3519MK-20-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM3519MK-20%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3519MK-20/NOPB, DC-DC boost regulator, 20V output, 5.4 MHz switching, PWM dimming, TSOT-23-6 package, -40°C to 85°C.","salesMarkdown":"## Boost regulator for single-LED-string backlights The LM3519MK-20/NOPB is a fixed-frequency, step-up (boost) DC-DC regulator from Texas Instruments, designed specifically to drive a single series string of white LEDs for backlight applications. It integrates the switching MOSFET internally and delivers a regulated 20 V output at up to 20 mA per channel from a 2.7 V to 5.5 V input supply. The 5.4 MHz switching frequency lets you use a small inductor and ceramic capacitors, shrinking the total solution footprint into a TSOT-23-6 package. ## PWM dimming and the 20 V output ceiling Brightness control is handled through a PWM dimming input, which lets you modulate the LED current without affecting colour temperature — standard practice for display backlights. The 20 V output rail is the maximum compliance voltage for the LED string; if your backlight needs more than that (e.g. six or more white LEDs in series), this part won't support it. For a typical three- or four-LED string at 20 mA, the 20 V ceiling gives about 5 V headroom per LED, which is comfortable for most white LEDs at full brightness. ## Temperature grade and where it fits Rated for -40°C to 85°C ambient, this is an industrial-temperature part. It will handle outdoor telecom panels, automotive cabin displays, and factory HMI backlights without issue. Not rated for under-hood or engine-bay environments — those would need the 125°C rated LM2703 variant if you need higher temperature tolerance. ## Lifecycle and sourcing reality The LM3519MK-20/NOPB carries an Active lifecycle status and is ROHS3 compliant.","metaTitle":"LM3519MK-20/NOPB LED Driver, DC-DC Boost, 20V Output","metaDescription":"LM3519MK-20/NOPB DC-DC boost regulator for backlight LEDs. 20V output, 5.4 MHz switching, PWM dimming, TSOT-23-6. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"DC DC Regulator","Dimming":"PWM","Package":"Tape & Reel (TR); Cut Tape (CT)","Topology":"Step-Up (Boost)","Frequency":"5.4MHz","Applications":"Backlight","Mounting Type":"Surface Mount","Package / Case":"SOT-23-6 Thin, TSOT-23-6","lifecycle_stage":"eol_hot","Voltage - Output":"20V","Number of Outputs":"1","Internal Switch(s)":"Yes","Operating Temperature":"-40°C ~ 85°C (TA)","Voltage - Supply (Max)":"5.5V","Voltage - Supply (Min)":"2.7V","Supplier Device Package":"TSOT-23-6","Current - Output / Channel":"20mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.12","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.12000","currency":"USD"},{"qty":10,"price":"$1.90700","currency":"USD"},{"qty":25,"price":"$1.79920","currency":"USD"},{"qty":100,"price":"$1.53300","currency":"USD"},{"qty":250,"price":"$1.43948","currency":"USD"},{"qty":500,"price":"$1.25954","currency":"USD"},{"qty":1000,"price":"$1.04362","currency":"USD"},{"qty":2000,"price":"$1.01850","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0d0bfe3fa418502f0a4f99d752b6171a.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3519MK-20-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/LM3519MK-20-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}