{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940T-5.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940T-5.0","canonicalUrl":"https://icboms.com/texas-instruments/LM2940T-5.0","factsUrl":"https://icboms.com/api/mcp/products/LM2940T-5.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940T-5.0, fixed 5V output LDO, 1A, 1V dropout max, 64dB PSRR at 120Hz, -40°C to 125°C, TO-220-3, through hole.","salesMarkdown":"## 5V rail for harsh environments — 1A LDO with 1V dropout The Texas Instruments LM2940T-5.0 is a fixed 5V output, 1A low-dropout regulator in a TO-220-3 through-hole package. It delivers up to 1A with a maximum dropout voltage of 1V at full load, making it suitable for post-switcher clean-up or battery-powered rails where input-to-output headroom is tight. ## PSRR and protection — what the ratings mean The 64dB PSRR at 120Hz tells the designer how much 100/120Hz ripple from a rectified AC input or a switching pre-regulator gets attenuated. At 64dB, a 1Vpp ripple on the input drops to about 0.6 mVpp on the output — enough for most analog and logic supplies, though a 5V ADC reference might need a second stage. On-chip protection includes over-current, over-temperature, reverse polarity, and short-circuit shutdown. The reverse polarity clamp means the regulator survives a reversed battery connection without external Schottky diodes — a real advantage in automotive and battery-backed systems. It remains available for existing production runs and repairs, but TI advises against using it in new projects.","metaTitle":"LM2940T-5.0 5V 1A LDO Regulator, TO-220-3, NRND","metaDescription":"Texas Instruments LM2940T-5.0 fixed 5V output LDO, 1A, 1V dropout, 64dB PSRR at 120Hz, -40°C to 125°C, TO-220-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"64dB (120Hz)","Series":"-","Package":"Tube","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Not For New Designs","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":"TO-220-3","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.7000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940T-5.0/alternatives.json"},"ai":{"faq":[{"question":"Is LM2940T-5.0 pin compatible with LM2940T-12?","answer":"Yes, the LM2940T-5.0 and LM2940T-12 share the same TO-220-3 pinout and footprint — they differ only in the fixed output voltage. The 5V version is pin-compatible with the 12V variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940T-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/LM2940T-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}}