{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940IMP-12/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940IMP-12-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2940IMP-12-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2940IMP-12%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940IMP-12/NOPB, fixed 12V output LDO, 1A, 66dB PSRR at 120Hz, SOT-223-4, surface mount, active production.","salesMarkdown":"## Fixed 12V rail for sensitive loads The LM2940IMP-12/NOPB is a fixed 12V output LDO regulator from Texas Instruments, delivering up to 1A continuous current in a SOT-223-4 surface-mount package. Its 66dB PSRR at 120Hz makes it a strong candidate for post-regulating a switching supply that feeds an analog or RF rail where ripple at the fundamental switching frequency must be suppressed. ## Dropout headroom and thermal budget Maximum dropout voltage is 1V at 1A load, so the input must stay above 13V under full current to maintain regulation. The SOT-223-4 package's large tab conducts heat to the PCB copper plane; the effective RthJA depends on the board layout and copper area under the tab. ## Protection set reduces external components On-chip protection includes over-current, over-temperature, reverse polarity, and short-circuit. These features allow the regulator to survive output faults and reverse-battery conditions without additional clamp diodes or crowbar circuits, simplifying the BOM for a 12V rail in a power-distribution block.","metaTitle":"LM2940IMP-12/NOPB – TI LDO Regulator 12V 1A SOT-223-4","metaDescription":"Texas Instruments LM2940IMP-12/NOPB fixed 12V output LDO, 1A, 66dB PSRR at 120Hz, SOT-223-4, active production. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"66dB (120Hz)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","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":"-40°C~85°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"1V @ 1A","Current - Supply (Max)":"15 mA","Voltage - Output (Max)":"-","Supplier Device Package":"SOT-223-4","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"12V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.4000","priceTiers":[{"qty":1,"price":"$2.40000","currency":"USD"},{"qty":10,"price":"$2.15500","currency":"USD"},{"qty":25,"price":"$2.03240","currency":"USD"},{"qty":100,"price":"$1.73170","currency":"USD"},{"qty":250,"price":"$1.62604","currency":"USD"},{"qty":500,"price":"$1.42278","currency":"USD"},{"qty":1000,"price":"$1.17888","currency":"USD"},{"qty":2000,"price":"$1.15050","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940IMP-12%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the PSRR of LM2940IMP-12/NOPB and why does it matter?","answer":"PSRR is 66dB at 120Hz. This is the ripple rejection at the fundamental frequency of a full-wave rectified line supply or the switching frequency of a typical DC-DC converter. For a 12V rail feeding an analog front-end or RF mixer, that rejection determines how much of the input ripple appears on the output."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940IMP-12-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/LM2940IMP-12-NOPB 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}}