{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940T-8.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940T-8.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2940T-8.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2940T-8.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940T-8.0/NOPB, positive fixed 8V output LDO voltage regulator, 1A output current, 1V max dropout at 1A, 26V max input, -40°C to 125°C operating temperature, TO-220-3 through-hole package.","salesMarkdown":"## Fixed 8V rail — the BOM callout is exact The LM2940T-8.0/NOPB is a positive fixed-output LDO regulator from the LM2940 family, delivering a regulated 8V at up to 1A. The fixed 8V output means this is not an adjustable part — the BOM line must specify exactly 8V, and the input rail must stay above 9V to maintain regulation at full load given the 1V max dropout at 1A. ## Dropout headroom and input rail budgeting Maximum dropout is 1V at 1A output, so a 9V input rail is the practical minimum for full-load regulation. The 26V maximum input voltage gives headroom for unregulated supplies or battery voltages that sag under load. Quiescent current is 10 mA typical, rising to 15 mA max — this matters for always-on circuits where the LDO's own consumption cuts into standby budget. ## Protection set for industrial and automotive environments Built-in protection covers over-current, over-temperature, reverse polarity, and short circuit conditions. This reduces the external protection components needed on the board and improves system reliability in environments where supply faults are expected. ## PSRR at 120Hz — line ripple rejection for analog loads PSRR is 66dB at 120Hz. For a 1Vpp input ripple at 120Hz, the output ripple is attenuated by the PSRR value. ## Through-hole TO-220-3 — thermal and assembly notes The tab is electrically connected to the output pin, so the heatsink must be isolated or the mounting hole must use an insulating shoulder washer if the heatsink is grounded. The three-pin layout (input, ground, output) is industry-standard and matches the footprint of other TO-220 LDOs, making it a drop-in replacement for 8V fixed regulators in the same package. The product status is Active.","metaTitle":"LM2940T-8.0/NOPB 8V Fixed 1A LDO, TO-220-3, Active","metaDescription":"Texas Instruments LM2940T-8.0/NOPB positive fixed 8V output LDO regulator, 1A output, 1V max dropout at 1A, -40°C to 125°C, TO-220-3. Active lifecycle.","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":"Tube","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-220-3","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":"TO-220-3","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940T-8.0%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What are the protection features of LM2940T-8.0/NOPB?","answer":"The regulator includes over-current, over-temperature, reverse polarity, and short circuit protection. These are built-in and require no external components to function."},{"question":"What is the closest pin-compatible alternative to LM2940T-8.0/NOPB in this component family?","answer":"Within the LM2940 family, the closest pin-compatible alternatives are the other fixed-output voltage variants in the TO-220-3 package, such as the 5V LM2940T-5.0/NOPB or the 12V LM2940T-12.0/NOPB. The pinout (input, ground, output) is identical across the family; only the output voltage changes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940T-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/LM2940T-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}}