{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940LDX-5.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940LDX-5.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2940LDX-5.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2940LDX-5.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940LDX-5.0/NOPB, positive fixed 5V LDO regulator, 1A output, 64dB PSRR at 120Hz, 1V max dropout at 1A, -40°C to 125°C, 8-WSON (4x4) package, Tape & Reel.","salesMarkdown":"The 1V maximum dropout at full load means the input rail must stay above 6V to maintain regulation — a 5V rail from a 6.5V-to-26V source is the intended use case. The 64dB PSRR at 120Hz gives 2.5 mVpp ripple rejection on a 5V rail — adequate for driving analog front-ends or sensor bias, though not as aggressive as modern LDOs with 70+ dB at 1 kHz. ## Protection features and quiescent draw Built-in protection includes over-current, over-temperature, reverse polarity, and short-circuit — all standard for a robust linear regulator. The 10 mA quiescent current is typical for a 1A-class LDO from this era; it adds 50 mW of ground-pin dissipation at 5V output, which is negligible against the 1A load loss but matters in always-on battery-backed rails. Maximum supply current is 15 mA, confirming the quiescent figure is stable across load and temperature. The closest functional drop-in is the through-hole LM2940T-5.0, which shares the same die and 5V fixed output but differs in package and thermal path — the WSON version requires a different PCB footprint and reflow profile. Because the part is obsolete, date-code consistency and lot traceability become critical. Every reel should be inspected for marking font, pad oxidation, and reflow compatibility — the 8-WSON exposed pad is a common target for re-marked or sanded counterfeit parts. We quote each lot against the BOM quantity and can provide photos of the actual stock before commitment.","metaTitle":"LM2940LDX-5.0/NOPB 5V Fixed LDO Regulator, 1A, 8-WSON","metaDescription":"Texas Instruments LM2940LDX-5.0/NOPB positive fixed 5V LDO, 1A output, 64dB PSRR at 120Hz, -40°C to 125°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":"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":"$2.4400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940LDX-5.0%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Can I use LM2940LDX-5.0/NOPB in place of LM2940T-5.0?","answer":"The LM2940T-5.0 is the through-hole TO-220 version of the same 5V fixed LDO die. The electrical specs (1A output, 1V dropout, 64dB PSRR) are identical, but the package and footprint differ completely — the WSON requires a surface-mount reflow profile and an exposed-pad thermal land, while the TO-220 is through-hole with a tab. They are not drop-in replacements without a board redesign."},{"question":"What is the recommended replacement for LM2940LDX-5.0/NOPB?","answer":"Texas Instruments has not published an official successor for this order code. For new designs, evaluate a modern 1A LDO in a WSON or similar thermally enhanced package, such as the TPS7A4700 family, which offers lower dropout and higher PSRR. For existing BOMs, the LM2940LDX-5.0/NOPB is available through independent distribution while surplus lasts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940LDX-5.0-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/LM2940LDX-5.0-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}}