{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM7912CT/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM7912CT-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM7912CT-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM7912CT%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM79xx series negative fixed linear regulator, LM7912CT/NOPB, -12V output, 1.5A, TO-220-3, through-hole, tube.","salesMarkdown":"## Active production — -12V fixed output at 1.5A The LM7912CT/NOPB is an active-production negative fixed linear regulator from Texas Instruments, delivering a regulated -12V output at up to 1.5A continuous. This is the through-hole TO-220-3 variant, shipped in tube packaging. The -12V rail is a common requirement for bipolar analog supplies — op-amp circuits, audio preamps, and industrial sensor interfaces that need a symmetrical ±12V pair. The 1.5A rating covers moderate loads like multiple op-amp stages or a small relay bank. The 70 dB PSRR at 120 Hz means the output rejects 99.97% of the 100/120 Hz ripple from a full-wave rectifier. For an audio preamp or a precision ADC reference, that ripple attenuation keeps the power-supply hum out of the signal band. At higher frequencies the PSRR rolls off, so the upstream bulk capacitance and a low-ESR electrolytic at the regulator input are what keep switching noise from coupling through. The 1.5 mA quiescent current is modest for a 1.5 A part — the regulator's own draw is negligible compared to the load. ## Dropout and protection — 1.1 V headroom at 1 A, thermal and short-circuit safe Maximum dropout is 1.1 V at 1 A load, meaning the input must stay at least 1.1 V below the -12 V output (i.e., more negative than -13.1 V) to maintain regulation. A -15 V to -18 V unregulated rail is the typical feed — the extra headroom covers line ripple and temperature drift. Built-in over-temperature and short-circuit protection let the regulator survive a sustained output short or a thermal overload without external crowbar circuitry. The TO-220-3 tab is the thermal path — a heatsink is needed above a few hundred mA in still air. ## Compliance and sourcing No pin-compatible second source is documented — the LM7912 footprint is unique to the 79xx series negative regulators.","metaTitle":"LM7912CT/NOPB -12V 1.5A Fixed Negative Linear Regulator","metaDescription":"Active-production -12V fixed-output linear regulator from Texas Instruments. 1.5A output, 70dB PSRR at 120Hz, TO-220-3. RoHS3 compliant. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"PSRR":"70dB (120Hz)","Package":"Tube","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-220-3","lifecycle_stage":"eol_hot","Current - Output":"1.5A","Protection Features":"Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Negative","Operating Temperature":"0°C ~ 125°C","Voltage - Input (Max)":"-35V","Voltage Dropout (Max)":"1.1V @ 1A","Supplier Device Package":"TO-220-3","Current - Quiescent (Iq)":"1.5 mA","Voltage - Output (Min/Fixed)":"-12V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.64","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.64000","currency":"USD"},{"qty":10,"price":"$1.46900","currency":"USD"},{"qty":25,"price":"$1.38600","currency":"USD"},{"qty":100,"price":"$1.18080","currency":"USD"},{"qty":250,"price":"$1.10876","currency":"USD"},{"qty":500,"price":"$0.97016","currency":"USD"},{"qty":1000,"price":"$0.80385","currency":"USD"},{"qty":2500,"price":"$0.78450","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6f1c17adda5954a99317d1b49404ace8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of LM7912CT/NOPB?","answer":"This makes it suitable for noise-sensitive analog loads like audio preamps or ADC reference supplies."},{"question":"What package does LM7912CT/NOPB come in?","answer":"It is supplied in a TO-220-3 through-hole package, shipped in tubes. The tab is the thermal pad and is electrically connected to the output (negative rail)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM7912CT-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/LM7912CT-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}}