{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940IMPX-12/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940IMPX-12-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2940IMPX-12-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2940IMPX-12%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940IMPX-12/NOPB, positive fixed linear regulator, 12V output, 1A, 26V max input, 66dB PSRR at 120Hz, SOT-223-4 surface mount, -40°C to 85°C.","salesMarkdown":"## 12 V fixed rail with 1 A headroom The Texas Instruments LM2940IMPX-12/NOPB is a positive fixed-output linear regulator delivering 12 V at up to 1 A from a maximum input of 26 V. The fixed 12 V output simplifies the BOM — no external resistor divider needed — and the 66 dB PSRR at 120 Hz gives reasonable line-frequency ripple rejection for powering analog circuits or sensor interfaces fed from a rectified supply. ## Protection set reduces external clamp count Built-in over-current, over-temperature, reverse polarity, and short-circuit protection mean this regulator can survive a miswired battery connection or a downstream short without external crowbar or series diode. In an automotive or battery-backed application, the reverse polarity protection alone saves a Schottky and its voltage drop — the 1 V dropout already eats into headroom, so avoiding an extra forward drop matters. The suffix indicates the lead-free, ROHS-compliant variant; the base LM2940 family has broad distribution and multiple package options, so alternate sourcing within the family is straightforward if tape-and-reel or cut-tape quantities are needed. The active status means supply is not constrained by an end-of-life window; the main variables are date-code spread and reel condition, which can be specified in the purchase order for lot-controlled builds.","metaTitle":"LM2940IMPX-12/NOPB Linear Regulator, 12V Fixed Output, 1A","metaDescription":"TI LM2940IMPX-12/NOPB positive fixed linear regulator: 12V output at 1A, 66dB PSRR at 120Hz, 26V max input, SOT-223-4. Active, ROHS3.","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":"$1.9000","priceTiers":[{"qty":1,"price":"$1.90000","currency":"USD"},{"qty":10,"price":"$1.71000","currency":"USD"},{"qty":25,"price":"$1.61360","currency":"USD"},{"qty":100,"price":"$1.37470","currency":"USD"},{"qty":250,"price":"$1.29080","currency":"USD"},{"qty":500,"price":"$1.12944","currency":"USD"},{"qty":1000,"price":"$0.93582","currency":"USD"},{"qty":2000,"price":"$0.87128","currency":"USD"},{"qty":6000,"price":"$0.83901","currency":"USD"},{"qty":10000,"price":"$0.80674","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940IMPX-12%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Is LM2940IMPX-12/NOPB equivalent to LM2940T-12?","answer":"Both are 12 V fixed-output regulators in the LM2940 family, but the LM2940IMPX-12/NOPB is the surface-mount SOT-223-4 variant, while the LM2940T-12 is the TO-220 through-hole version. The electrical specifications (12 V, 1 A, 26 V max input, dropout, PSRR) are the same; the difference is the package and mounting method."},{"question":"What is LM2940IMPX-12/NOPB's PSRR rating?","answer":"The PSRR is 66 dB at 120 Hz, which is the typical line-frequency ripple rejection figure."},{"question":"What package does LM2940IMPX-12/NOPB come in?","answer":"It is supplied in a SOT-223-4 surface-mount package (supplier device package), also referenced as TO-261-4 or TO-261AA. The shipping options are Tape & Reel (TR) or Cut Tape (CT)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940IMPX-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/LM2940IMPX-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}}