{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940IMPX-5.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940IMPX-5.0","canonicalUrl":"https://icboms.com/texas-instruments/LM2940IMPX-5.0","factsUrl":"https://icboms.com/api/mcp/products/LM2940IMPX-5.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940IMPX-5.0, 5V fixed-output LDO, 1A, 1V max dropout, PSRR 64dB at 120Hz, SOT-223-4 surface mount, -40°C to 85°C, Tape & Reel.","salesMarkdown":"## 5 V fixed LDO, 1 A — dropout and thermal budget The LM2940IMPX-5.0 is a fixed 5 V positive-output LDO from Texas Instruments, delivering up to 1 A continuous output with a maximum dropout voltage of 1 V at full load. That 1 V headroom means the input rail must stay above 6 V under worst-case line and load transients to maintain regulation — a common constraint when deriving a clean 5 V rail from a 7 V to 26 V input bus in industrial or automotive auxiliary supplies. The part integrates over-current, over-temperature, reverse-polarity, and short-circuit protection, so it can sit on a board without a separate crowbar or foldback circuit for the output. The SOT-223-4 package is the standard surface-mount footprint for this 1 A LDO family. ## PSRR at 120 Hz — a spec that matters for post-rectifier rails The power supply rejection ratio is 64 dB at 120 Hz.","metaTitle":"LM2940IMPX-5.0 5V Fixed 1A LDO, SOT-223-4, Obsolete","metaDescription":"LM2940IMPX-5.0 5V fixed-output LDO, 1A, dropout 1V max, PSRR 64dB at 120Hz. SOT-223-4, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"64dB (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)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.1000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f38d6c1a461ac905342e1b9990545fb3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940IMPX-5.0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940IMPX-5.0","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-5.0 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}}