{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940SX-8.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940SX-8.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2940SX-8.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2940SX-8.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940SX-8.0/NOPB, positive fixed 8V output LDO voltage regulator, 1A output, 1V dropout max, PSRR 66dB at 120Hz, -40°C to 125°C, DDPAK/TO-263-3 package, surface mount.","salesMarkdown":"## 8 V fixed output, 1 A capability — what the dropout means for your rail The Texas Instruments LM2940SX-8.0/NOPB is a positive fixed-output LDO regulator delivering 8 V at up to 1 A. The maximum dropout voltage is 1 V at full load, so the input rail must stay above 9 V to maintain regulation — a 9 V or 12 V bus is the typical upstream choice. The 66 dB PSRR at 120 Hz tells you this part attenuates full-wave rectified ripple by a factor of 2000, which matters when the regulator sits after a bulk capacitor on a 50/60 Hz rectifier stage. ## Industrial temperature grade and protection set The protection block includes over-current, over-temperature, reverse polarity, and short-circuit — all on-chip, no external clamp diode needed for the reverse condition. ## Package and thermal: DDPAK/TO-263-3 The DDPAK/TO-263-3 surface-mount package (3 leads plus exposed tab) is the same footprint as D²Pak. The base product number LM2940 covers a family of fixed-output voltages; the -8.0/NOPB suffix identifies the 8 V variant in lead-free (NOPB) finish.","metaTitle":"LM2940SX-8.0/NOPB 8V 1A LDO Regulator, TO-263","metaDescription":"Texas Instruments LM2940SX-8.0/NOPB positive fixed 8V output LDO, 1A, dropout 1V max, PSRR 66dB at 120Hz, -40°C to 125°C, DDPAK/TO-263-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"66dB (120Hz)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-263-4, D²Pak (3 Leads + Tab), TO-263AA","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"1A","Base Product Number":"LM2940","Protection Features":"Over Current, Over Temperature, Reverse Polarity, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C~125°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"1V @ 1A","Current - Supply (Max)":"15 mA","Voltage - Output (Max)":"-","Supplier Device Package":"DDPAK/TO-263-3","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.5000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940SX-8.0%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between LM2940SX-8.0/NOPB and other LM2940 variants?","answer":"The LM2940 family shares the same 1 A capability, dropout, and protection features across fixed output voltages. The -8.0/NOPB suffix selects the 8 V output and lead-free finish. Other variants offer 5 V, 10 V, 12 V, and 15 V outputs — the package and pinout are identical, so a board laid out for one voltage can accept another by changing the regulator only."},{"question":"What is the PSRR of LM2940SX-8.0/NOPB?","answer":"PSRR is 66 dB at 120 Hz, which corresponds to a ripple attenuation of roughly 2000:1 at the full-wave rectifier fundamental frequency."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940SX-8.0-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/LM2940SX-8.0-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}