{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940IMPX-8.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940IMPX-8.0","canonicalUrl":"https://icboms.com/texas-instruments/LM2940IMPX-8.0","factsUrl":"https://icboms.com/api/mcp/products/LM2940IMPX-8.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940IMPX-8.0, fixed 8V positive LDO regulator, 1A output, 66dB PSRR at 120Hz, 1V max dropout at 1A, SOT-223-4 surface-mount package, -40°C to 85°C operating temperature.","salesMarkdown":"## Fixed 8V LDO in SOT-223-4 — what it delivers The Texas Instruments LM2940IMPX-8.0 is a fixed-output 8V positive LDO regulator rated for 1A continuous output current. It operates from an input up to 26V and delivers the regulated 8V rail with a maximum dropout of 1V at full load — enough headroom for a 9V battery or a lightly regulated 12V bus. ## PSRR and protection — where it earns its keep A PSRR of 66 dB at 120 Hz means the regulator attenuates 120 Hz ripple (full-wave rectifier residue) by a factor of about 2000 — useful for powering analog front-ends or sensor supplies where line-frequency noise couples into the signal chain. On-chip protection covers over-current, over-temperature, reverse polarity, and short-circuit conditions. The reverse polarity clamp is a practical safeguard when the input supply is field-wired or battery-connected and could be accidentally reversed. The fixed 8V output is less common than the 5V or adjustable variants in the LM2940 family, which limits cross-reference options.","metaTitle":"LM2940IMPX-8.0 Texas Instruments LDO Regulator, 8V Fixed, 1A","metaDescription":"Texas Instruments LM2940IMPX-8.0 fixed 8V LDO regulator, 1A output, 66dB PSRR at 120Hz. SOT-223-4 surface mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"66dB (120Hz)","Series":"-","Package":"Tape & Reel (TR)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","Product Status":"Obsolete","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~85°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"1V @ 1A","Current - Supply (Max)":"15 mA","Voltage - Output (Max)":"-","Supplier Device Package":"SOT-223-4","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f38d6c1a461ac905342e1b9990545fb3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940IMPX-8.0/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM2940IMPX-8.0?","answer":"The LM2940 family includes 5V and adjustable-output variants, but those change the output voltage and are not direct substitutes without a BOM change. A cross-reference search against the 8V fixed output and SOT-223-4 package is the practical next step."},{"question":"What is LM2940IMPX-8.0's listed PSRR?","answer":"The PSRR is 66 dB at 120 Hz, which provides strong rejection of line-frequency ripple for sensitive analog supplies."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940IMPX-8.0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2940IMPX-8.0 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}}