{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940LD-5.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940LD-5.0","canonicalUrl":"https://icboms.com/texas-instruments/LM2940LD-5.0","factsUrl":"https://icboms.com/api/mcp/products/LM2940LD-5.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940LD-5.0, fixed 5V positive LDO, 1A output, 64dB PSRR at 120Hz, 1V max dropout at 1A, -40°C to 125°C, 8-WSON (4x4 mm) exposed pad package, Tape & Reel.","salesMarkdown":"## Fixed 5V LDO for noise-sensitive industrial loads The LM2940LD-5.0 from Texas Instruments is a fixed 5V positive-output low-dropout regulator rated for 1A continuous output current, with a maximum dropout voltage of 1V at full load. Its 64dB PSRR at 120Hz makes it a candidate for powering analog front-ends, sensor interfaces, and mixed-signal circuits where rail noise couples into the signal path. ## Dropout headroom and input voltage budget With a 26V absolute maximum input and 1V max dropout at 1A, the input rail must stay at least 6V for a clean 5V output under full load — 6V minimum at the regulator pin, not at the bulk cap. The 10 mA quiescent current (15 mA max supply current) is typical for a 1A-class LDO; it is not a micropower part, so always-on battery applications should budget the Iq. Protection features include over-current, over-temperature, reverse polarity, and short-circuit — no external clamp diode needed for reverse-battery scenarios. The LM2940LD-5.0 carries an official lifecycle status of Obsolete. Sourcing this part means qualifying the supplier's stock — date-code consistency, laser-etch font match, and lot traceability are the screening steps a buyer should run before committing a BOM line, especially if the part is being used in a long-life product that may need a last-time buy or a qualified second-source evaluation. ## 8-WSON package — thermal and layout notes The 8-WSON (4x4 mm) exposed pad package requires a thermal land pattern on the PCB to sink heat from the die. The package ships in Tape & Reel, so pick-and-place is standard for volume assembly.","metaTitle":"LM2940LD-5.0 1A Fixed 5V LDO, 64dB PSRR, Obsolete","metaDescription":"Texas Instruments LM2940LD-5.0 fixed 5V LDO, 1A output, 64dB PSRR at 120Hz, -40°C to 125°C, 8-WSON package.","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":"8-WDFN Exposed Pad","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~125°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"1V @ 1A","Current - Supply (Max)":"15 mA","Voltage - Output (Max)":"-","Supplier Device Package":"8-WSON (4x4)","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"5V"}},"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/LM2940LD-5.0/alternatives.json"},"ai":{"faq":[{"question":"What is LM2940LD-5.0's listed PSRR?","answer":"The power supply rejection ratio is specified as 64dB at 120Hz. This makes the part suitable for cleaning up rectified line-frequency ripple on the input rail before it reaches sensitive analog circuitry."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940LD-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/LM2940LD-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}}