{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940S-9.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940S-9.0","canonicalUrl":"https://icboms.com/texas-instruments/LM2940S-9.0","factsUrl":"https://icboms.com/api/mcp/products/LM2940S-9.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940S-9.0, fixed 9V positive LDO regulator, 1A output, 1V max dropout, PSRR 64dB at 120Hz, -40°C to 125°C, TO-263-3 DDPAK, tube.","salesMarkdown":"## 9 V fixed LDO in a TO-263 DDPAK The LM2940S-9.0: It comes in a TO-263-3 (DDPAK) surface-mount package with a tab for heat sinking. The 64 dB PSRR at 120 Hz makes it a clean choice for post-switcher rails feeding analog or audio loads. ## Dropout and protection — real-world margin Maximum dropout is 1 V at 1 A, so the input rail needs at least 10 V to maintain regulation at full load. The 15 mA maximum supply current and 10 mA quiescent current are modest for a 1 A LDO, but not ultra-low-power — factor them into standby budgets. Built-in protection covers over-current, over-temperature, reverse polarity, and short circuit — no external clamp diodes or crowbar circuits needed for basic fault tolerance. The LM2940S-9.0 is listed as obsolete.","metaTitle":"LM2940S-9.0 9V 1A LDO Regulator, TO-263, PSRR 64dB","metaDescription":"Texas Instruments LM2940S-9.0 fixed 9V output LDO, 1A, dropout 1V max, PSRR 64dB at 120Hz, -40°C to 125°C, TO-263 DDPAK.","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":"Tube","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-263-4, D²Pak (3 Leads + Tab), TO-263AA","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":"DDPAK/TO-263-3","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"9V"}},"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/LM2940S-9.0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940S-9.0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2940S-9.0 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}}