{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3891ESX-1.2/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3891ESX-1.2-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP3891ESX-1.2-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP3891ESX-1.2%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3891ESX-1.2/NOPB, 800mA LDO, fixed 1.2V output, 0.4V dropout, 80dB~65dB PSRR, DDPAK/TO-263-5, -40°C~125°C.","salesMarkdown":"## Active production — 1.2V fixed-output LDO for low-noise rails The LP3891ESX-1.2/NOPB is an 800 mA LDO from Texas Instruments with a fixed 1.2 V output — a common core supply for FPGAs, ASICs, and low-voltage digital logic that needs a clean, regulated rail. ## Dropout and PSRR — the two numbers that decide the rail quality PSRR measures 80 dB at 120 Hz and 65 dB at 1 kHz — the 120 Hz figure suppresses full-wave rectifier ripple by a factor of 10,000, while the 1 kHz figure still knocks down switching-regulator noise by a factor of ~1,800. Quiescent current is just 30 µA, making this LDO a good fit for always-on sub-circuits in battery-powered equipment where the regulator's own draw must not dominate the sleep budget. ## Protection set and temperature range Built-in protection covers overcurrent, overtemperature, short-circuit, and undervoltage lockout (UVLO) — the part shuts down cleanly rather than letting the output sag into an undefined state. ROHS3 compliant — no restricted substances under the latest EU directive, so it ships into global markets without exemption paperwork.","metaTitle":"LP3891ESX-1.2/NOPB LDO, 1.2V Fixed, 800mA, DDPAK-5","metaDescription":"Texas Instruments LP3891ESX-1.2/NOPB, 800mA LDO, fixed 1.2V output, 0.4V dropout, 80dB PSRR, -40 to 125°C, active production, ROHS3. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"80dB ~ 65dB (120Hz ~ 1kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-263-6, D²Pak (5 Leads + Tab), TO-263BA","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"800mA","Protection Features":"Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"5.5V","Voltage Dropout (Max)":"0.4V @ 800mA","Current - Supply (Max)":"8 mA","Supplier Device Package":"DDPAK/TO-263-5","Current - Quiescent (Iq)":"30 µA","Voltage - Output (Min/Fixed)":"1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.86","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.86000","currency":"USD"},{"qty":10,"price":"$3.46900","currency":"USD"},{"qty":25,"price":"$3.27920","currency":"USD"},{"qty":100,"price":"$2.84210","currency":"USD"},{"qty":250,"price":"$2.69636","currency":"USD"},{"qty":500,"price":"$2.41944","currency":"USD"},{"qty":1000,"price":"$2.06250","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f49e8529952262208fc8ee3b9411ec35.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of LP3891ESX-1.2/NOPB?","answer":"PSRR is 80 dB at 120 Hz and 65 dB at 1 kHz — strong rejection of both line-frequency ripple and lower-frequency switching noise."},{"question":"What package does LP3891ESX-1.2/NOPB come in?","answer":"It is supplied in a DDPAK/TO-263-5 surface-mount package (5 leads plus exposed tab), available on tape and reel or cut tape."},{"question":"What compliance documentation is available for LP3891ESX-1.2/NOPB?","answer":"The part is ROHS3 compliant — the manufacturer provides a RoHS certificate and material declaration; no UL or IEC certification is listed in the standard documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3891ESX-1.2-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/LP3891ESX-1.2-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}}