{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2940CSX-15/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2940CSX-15-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2940CSX-15-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2940CSX-15%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2940CSX-15/NOPB, positive fixed-output LDO, 15V, 1A, dropout 0.8V max at 1A, PSRR 66 dB at 120 Hz, TO-263-3 (DDPAK) surface mount, 0°C to 125°C operating range.","salesMarkdown":"## 15 V fixed rail, 1 A continuous — the dropout margin matters The LM2940CSX-15/NOPB is a positive fixed-output LDO from Texas Instruments delivering a regulated 15 V at up to 1 A. The output is fixed at 15 V with no external resistor divider needed — it is a drop-in rail for post-regulator or point-of-load stages that need a clean 15 V supply from a higher unregulated bus. Maximum dropout is 0.8 V at the full 1 A load, so the input rail needs at least 15.8 V to maintain regulation. That 0.8 V headroom is tight for a 12 V bus — this part is designed for input rails from 15.8 V up to 26 V, not for 12 V-to-15 V conversion. ## Protection set reduces external clamp circuitry On-chip protection includes over-current, over-temperature, reverse polarity, and short-circuit. The reverse polarity protection is a practical feature for automotive or battery-backed rails where a reversed input connection can happen — it saves a series Schottky diode and its voltage drop. ## TO-263-3 package — thermal pad and board layout The package is a TO-263-3 (DDPAK) with an exposed tab on the back side.","metaTitle":"LM2940CSX-15/NOPB 15V Fixed Output LDO, 1A, TO-263-3","metaDescription":"Texas Instruments LM2940CSX-15/NOPB is a 15V fixed-output LDO rated 1A with 0.8V dropout at full load. PSRR 66 dB at 120 Hz.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"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-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":"$1.3857","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/f1c4256f4019947c4206f2126daf8930.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2940CSX-15%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Does LM2940CSX-15/NOPB have reverse polarity protection?","answer":"Yes, reverse polarity protection is included on-chip, along with over-current, over-temperature, and short-circuit protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2940CSX-15-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/LM2940CSX-15-NOPB 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}}