{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP8557IAYFQT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP8557IAYFQT","canonicalUrl":"https://icboms.com/texas-instruments/LP8557IAYFQT","factsUrl":"https://icboms.com/api/mcp/products/LP8557IAYFQT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP8557IAYFQT, DC DC Regulator LED Driver, 6 outputs, 28V, 25mA/ch, PWM dimming, Step-Up (Boost) topology, 16-DSBGA.","salesMarkdown":"## Active production — what it means for the BOM line The LP8557IAYFQT: ROHS3 compliance is confirmed on the manufacturer's record, so the part clears the material declaration gate without a waiver. ## Boost regulator parametrics for backlight arrays This is a 6-channel DC-DC boost regulator with integrated switches — the internal FET handles the step-up conversion, so no external power transistor is needed on the output stage. Each channel delivers 25 mA continuous, and the total output voltage can go up to 28 V — that combination drives a series string of six to eight white LEDs per channel in a typical backlight panel. PWM dimming is supported directly, which keeps the colour temperature stable across the brightness range — the controller modulates the on-time of the boost switch rather than dropping the current below the LED's rated minimum. ## Switching frequency and supply rail fit The oscillator can be set to either 500 kHz or 1 MHz via an external resistor — 1 MHz shrinks the inductor and output capacitor values for a compact layout, while 500 kHz trades component size for lower switching losses. The operating temperature range is -30°C to 85°C ambient — this covers most indoor and automotive cabin applications but does not reach the full -40°C industrial floor; check the thermal profile against your enclosure's ambient low. ## Footprint and board integration Packaged in a 16-bump DSBGA (0.4 mm pitch wafer-level chip-scale), the LP8557IAYFQT occupies roughly 2.5 mm × 2.0 mm of board area — the small footprint is the trade-off for a stencil-printed solder-paste process and X-ray inspection at assembly.","metaTitle":"Texas Instruments LP8557IAYFQT 6-Ch Boost LED Driver, 28V","metaDescription":"Active-production TI LP8557IAYFQT: 6-channel DC-DC boost LED driver, 28V output, 25mA/ch, PWM dimming. DSBGA-16. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"DC DC Regulator","Dimming":"PWM","Package":"Tape & Reel (TR); Cut Tape (CT)","Topology":"Step-Up (Boost)","Frequency":"500kHz, 1MHz","Applications":"Backlight","Mounting Type":"Surface Mount","Package / Case":"16-WFBGA, DSBGA","lifecycle_stage":"eol_hot","Voltage - Output":"28V","Number of Outputs":"6","Internal Switch(s)":"Yes","Operating Temperature":"-30°C ~ 85°C (TA)","Voltage - Supply (Max)":"5.5V","Voltage - Supply (Min)":"2.7V","Supplier Device Package":"16-DSBGA","Current - Output / Channel":"25mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.77","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.77000","currency":"USD"},{"qty":10,"price":"$2.49200","currency":"USD"},{"qty":25,"price":"$2.35040","currency":"USD"},{"qty":100,"price":"$2.00270","currency":"USD"},{"qty":250,"price":"$1.88044","currency":"USD"},{"qty":500,"price":"$1.64538","currency":"USD"},{"qty":1250,"price":"$1.36332","currency":"USD"},{"qty":2500,"price":"$1.33050","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b961e0a5b67d314527fa376d75c38969.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What compliance documentation does TI provide for LP8557IAYFQT?","answer":"Texas Instruments confirms ROHS3 compliance for the LP8557IAYFQT on its official product record — the standard TI compliance package includes the RoHS certificate of compliance, REACH SVHC declaration, and material declaration data sheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP8557IAYFQT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP8557IAYFQT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}