{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940IMP-12","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940IMP-12","canonicalUrl":"https://icboms.com/texas-instruments/LM2940IMP-12","factsUrl":"https://icboms.com/api/mcp/products/LM2940IMP-12","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940IMP-12, 12V fixed-output LDO regulator, 1A, 1V dropout at 1A, 66dB PSRR at 120Hz, SOT-223-4 surface-mount, -40°C to 85°C.","salesMarkdown":"## 12V fixed output at 1A — the load budget anchor The 1V maximum dropout at full load means the input rail must stay above 13V to maintain regulation — budget at least 1.5V headroom for line transients and temperature drift. ## 66dB PSRR at 120Hz — line-frequency ripple rejection The 66dB PSRR at 120Hz is the relevant spec for rectified AC supplies: it attenuates the 100/120Hz ripple from a full-wave bridge by a factor of 2000, so a 1Vpp ripple on the input becomes roughly 500µVpp on the output. This makes the part a clean choice for analog supply rails in industrial control or instrumentation where the primary supply is a linear or unregulated rectifier. ## Protection set — reduces external supervision Overcurrent, overtemperature, reverse polarity, and short-circuit protection are all integrated. No official successor is recorded on this line. For new designs, consider the LM2940 series in the SOT-223 package as a starting point; verify pin compatibility and dropout specs against the 12V fixed variant.","metaTitle":"LM2940IMP-12 12V 1A LDO Regulator, Obsolete – Sourcing Info","metaDescription":"Texas Instruments LM2940IMP-12 fixed 12V output, 1A LDO regulator in SOT-223-4. 66dB PSRR at 120Hz, 1V dropout at 1A.","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); Cut Tape (CT)","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)":"12V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f38d6c1a461ac905342e1b9990545fb3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940IMP-12/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940IMP-12","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2940IMP-12 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}}