{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940CS-15","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940CS-15","canonicalUrl":"https://icboms.com/texas-instruments/LM2940CS-15","factsUrl":"https://icboms.com/api/mcp/products/LM2940CS-15","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940CS-15, fixed 15V output low-dropout regulator, 1A output, 0.8V dropout at 1A, 64dB PSRR at 120Hz, surface-mount DDPAK/TO-263-3 package.","salesMarkdown":"## Fixed 15V rail, 1A capacity, DDPAK thermal slug The LM2940CS-15 is a single-output positive LDO regulator delivering a fixed 15 V output at up to 1 A continuous. The maximum dropout is 0.8 V at full load — at 15 V out, the input rail needs at least 15.8 V to maintain regulation, but the 26 V absolute maximum input gives headroom for unregulated supplies or battery stacks. ## Dropout margin and PSRR at line frequency A 0.8 V maximum dropout at 1 A means the designer must budget at least 800 mV between the input rail and the 15 V output under worst-case load and temperature. The 64 dB PSRR at 120 Hz is measured at the second-harmonic of full-wave rectified line frequency — this part rejects 60/120 Hz ripple well, which is the dominant noise in a post-bridge supply. ## Active production, DDPAK thermal management The DDPAK/TO-263-3 package (also known as D²Pak) has an exposed metal tab on the bottom — the tab is the output pin and the primary thermal path.","metaTitle":"LM2940CS-15 Texas Instruments 15V 1A LDO Regulator","metaDescription":"LM2940CS-15 fixed 15V output, 1A LDO from Texas Instruments. 0.8V dropout at 1A, 64dB PSRR, DDPAK/TO-263 package. Active lifecycle, ROHS3. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","PSRR":"64dB (120Hz)","Series":"-","Package":"Tube","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-263-4, D²Pak (3 Leads + Tab), TO-263AA","Product Status":"Active","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":"0°C~125°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"0.8V @ 1A","Current - Supply (Max)":"15 mA","Voltage - Output (Max)":"-","Supplier Device Package":"DDPAK/TO-263-3","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"15V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.1600","priceTiers":[{"qty":1,"price":"$3.16000","currency":"USD"},{"qty":10,"price":"$2.83600","currency":"USD"},{"qty":25,"price":"$2.68080","currency":"USD"},{"qty":100,"price":"$2.32330","currency":"USD"},{"qty":250,"price":"$2.20416","currency":"USD"},{"qty":500,"price":"$1.97780","currency":"USD"},{"qty":1000,"price":"$1.68600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940CS-15/alternatives.json"},"ai":{"faq":[{"question":"What package does the LM2940CS-15 come in?","answer":"It is supplied in a DDPAK/TO-263-3 surface-mount package (3 leads plus a tab). The supplier device package is listed as DDPAK/TO-263-3."},{"question":"What protection features does the LM2940CS-15 include?","answer":"Built-in protection covers overcurrent, overtemperature, reverse polarity, and short-circuit conditions. These are integrated — no external sense resistors or clamp diodes are needed for basic protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940CS-15","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2940CS-15 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}