{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3991TLX-1.5/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3991TLX-1.5-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP3991TLX-1.5-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP3991TLX-1.5%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3991TLX-1.5/NOPB fixed-output LDO regulator, 1.5 V, 300 mA, 4-WFBGA DSBGA package, surface mount, enable control, over-temperature and short-circuit protection.","salesMarkdown":"## Noise-sensitive rail regulator in a 1x1 mm footprint The LP3991TLX-1.5/NOPB is a fixed 1.5 V output LDO from Texas Instruments, delivering up to 300 mA with a maximum dropout voltage of 0.16 V at full load — the headroom between the input rail and 1.5 V must stay above 160 mV across the load range, or the output falls out of regulation. With a PSRR of 65 dB at 1 kHz, this regulator attenuates upstream ripple by a factor of roughly 1800 — suitable for powering analog front-ends, ADC/DAC reference rails, or audio codecs where supply noise degrades signal integrity. Housed in a 4-bump DSBGA measuring 1x1 mm (supplier device package 4-DSBGA), the LP3991TLX-1.5/NOPB occupies minimal PCB area — the 0.5 mm pitch demands careful solder-paste stencil design and X-ray inspection to confirm bump wetting. Surface-mount assembly with tape-and-reel or cut-tape packaging options; the enable pin allows the regulator to be gated by a system-level power-good or sleep signal, reducing quiescent draw to near zero when the load is idle. ## Protection and compliance Built-in over-temperature and short-circuit protection prevent damage under fault conditions — the regulator enters thermal shutdown if the die exceeds the safe limit and recovers automatically when it cools. Texas Instruments lists this part as Active in production with ROHS3 compliance — no end-of-life risk for ongoing designs, and the green finish meets current regulatory requirements for most markets.","metaTitle":"LP3991TLX-1.5/NOPB LDO 1.5V 300mA 4-DSBGA","metaDescription":"LP3991TLX-1.5/NOPB fixed 1.5V LDO, 300mA output, 65dB PSRR at 1kHz, 160mV dropout, -40 to 85°C. Active, ROHS3. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"65dB (1kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"4-WFBGA, DSBGA","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"300mA","Protection Features":"Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 85°C","Voltage - Input (Max)":"4V","Voltage Dropout (Max)":"0.16V @ 300mA","Current - Supply (Max)":"225 µA","Supplier Device Package":"4-DSBGA (1x1)","Current - Quiescent (Iq)":"100 µA","Voltage - Output (Min/Fixed)":"1.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.87","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.87000","currency":"USD"},{"qty":10,"price":"$0.77000","currency":"USD"},{"qty":25,"price":"$0.72280","currency":"USD"},{"qty":100,"price":"$0.59000","currency":"USD"},{"qty":250,"price":"$0.54800","currency":"USD"},{"qty":500,"price":"$0.46640","currency":"USD"},{"qty":1000,"price":"$0.37312","currency":"USD"},{"qty":3000,"price":"$0.33814","currency":"USD"},{"qty":6000,"price":"$0.33000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/338dc28812320956fb5e7cc01a893864.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of LP3991TLX-1.5/NOPB?","answer":"The listed PSRR is 65 dB at 1 kHz — this means ripple on the input is attenuated by roughly 1800 times at that frequency, making it a strong choice for noise-sensitive analog rails."},{"question":"What package does LP3991TLX-1.5/NOPB come in?","answer":"It is supplied in a 4-bump DSBGA (4-WFBGA) measuring 1x1 mm — an ultra-small footprint that requires careful board layout and X-ray inspection for reliable solder-joint formation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3991TLX-1.5-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/LP3991TLX-1.5-NOPB 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}}