{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP5521TM/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP5521TM-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP5521TM-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP5521TM%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP5521TM/NOPB, DC-DC Regulator LED Driver, 3-output switched-capacitor charge pump, I²C dimming, 4.55V output, 25.5mA per channel, 1.25MHz, 20-WFBGA, -30°C to 85°C.","salesMarkdown":"The Texas Instruments LP5521TM/NOPB is a 3-output DC-DC regulator built as a switched-capacitor charge pump, purpose-made for driving backlight LEDs. Unlike an inductor-based boost converter, this topology generates a regulated 4.55 V output using only ceramic capacitors — no magnetic component, which saves board height and eliminates inductor whine. Each of the three channels delivers up to 25.5 mA, controlled individually over an I²C bus for dimming. The 1.25 MHz switching frequency keeps external capacitors small, though the 20-WFBGA package (also called 20-TuSMD) means the board needs a reflow oven and X-ray inspection; this is not a hand-solder field-swap part. The -30°C to 85°C ambient range covers indoor consumer gear like LCD monitor backlights, portable device displays, and appliance panels, but it stops short of automotive cabin or outdoor enclosure temperatures. Dimming is handled entirely through the I²C interface, not a PWM input pin. That means the host microcontroller needs an I²C peripheral and a few bytes of register-write code to set each channel's brightness independently. No dedicated PWM timer is required, which simplifies the MCU selection, but the firmware must handle the I²C protocol and potentially a register map. The driver does not generate its own PWM waveform on the outputs; the current is set digitally via the bus. For a design already using I²C for other peripherals, this fits cleanly; for a system that only has a spare GPIO, an external I²C bridge or a different driver topology would be needed. ## Switched-capacitor topology — the no-inductor trade-off The charge-pump steps up the input voltage (2.7 V to 5.5 V) to the 4.55 V output using flying capacitors. No inductor means no magnetic field emissions and a simpler PCB layout.","metaTitle":"LP5521TM/NOPB LED Driver, DC-DC Regulator, I²C Dimming","metaDescription":"LP5521TM/NOPB is a 3-channel switched-capacitor charge pump LED driver with I²C dimming, 4.55V output, 25.5mA per channel, 1.25MHz switching, -30°C to 85°C","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"DC DC Regulator","Dimming":"I²C","Package":"Tape & Reel (TR); Cut Tape (CT)","Topology":"Switched Capacitor (Charge Pump)","Frequency":"1.25MHz","Applications":"Backlight","Mounting Type":"Surface Mount","Package / Case":"20-WFBGA","lifecycle_stage":"eol_hot","Voltage - Output":"4.55V","Number of Outputs":"3","Internal Switch(s)":"Yes","Operating Temperature":"-30°C ~ 85°C (TA)","Voltage - Supply (Max)":"5.5V","Voltage - Supply (Min)":"2.7V","Supplier Device Package":"20-TuSMD","Current - Output / Channel":"25.5mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.62","priceTiers":[{"qty":1,"price":"$1.62000","currency":"USD"},{"qty":10,"price":"$1.45100","currency":"USD"},{"qty":25,"price":"$1.37720","currency":"USD"},{"qty":100,"price":"$1.13120","currency":"USD"},{"qty":250,"price":"$1.05744","currency":"USD"},{"qty":500,"price":"$0.93450","currency":"USD"},{"qty":1250,"price":"$0.73776","currency":"USD"},{"qty":2500,"price":"$0.69600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/90b5c231cac52c9ebcf85be771eb74ac.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LP5521TM%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Can LP5521TM/NOPB be used as a replacement for LP5521?","answer":"The TM/NOPB suffix indicates a lead-free (NOPB) finish and a specific tape-and-reel / cut-tape packaging option. Functionally it is the same die as the LP5521 base part, so it should be a drop-in replacement for designs that already use the LP5521 in the same 20-WFBGA footprint. Verify the tape orientation and reel quantity against your pick-and-place setup."},{"question":"What is the closest functional second-source to LP5521TM/NOPB?","answer":"The LM2703MF-ADJ/NOPB is a single-output boost regulator in the same DC-DC regulator class, but it uses an inductive step-up topology, delivers 0.35 A on one channel, and comes in a different package. It is not a pin-compatible or direct replacement for the LP5521TM/NOPB's three-channel charge-pump architecture."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP5521TM-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/LP5521TM-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}