{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"L7912ACV-DG","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"L7912ACV-DG","canonicalUrl":"https://icboms.com/stmicroelectronics/L7912ACV-DG","factsUrl":"https://icboms.com/api/mcp/products/L7912ACV-DG","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics L7912ACV-DG, TO-220-3 through-hole, fixed -12V output, 1.5A, negative linear regulator with PSRR 60dB at 120Hz","salesMarkdown":"## Fixed -12 V rail in a TO-220 through-hole package The L7912ACV-DG is a single-output negative linear regulator delivering a fixed -12 V at up to 1.5 A from a -35 V maximum input. The TO-220 through-hole package suits point-of-load regulation on a main board or a separate heatsink — the tab is ground and the thermal path goes through the mounting hole to the chassis or PCB copper. Its 60 dB PSRR at 120 Hz provides meaningful ripple rejection from a full-wave rectified line-frequency supply — relevant when the regulator feeds an analog front end or a sensitive negative rail in an audio or instrumentation circuit. ## Dropout and quiescent current for load budgeting The typical dropout voltage is 1.1 V at 1 A — the input must stay at least 1.1 V more negative than -12 V under load to maintain regulation. Quiescent current runs 3 mA, which adds to the thermal budget but is low enough to ignore in most supply-rail designs. Built-in over-temperature and short-circuit protection means the regulator survives a momentary output short without external clamp diodes — useful during board bring-up or a downstream fault. STMicroelectronics lists the L7912ACV-DG as Obsolete. For BOM lines that must stay with a TO-220 negative regulator, the closest active sibling is the L7912AV — same base number, same package, same fixed -12 V output — but confirm the exact spec tolerance and operating temperature range against the original design requirements. Sourcing now runs through independent distribution and spot-market channels.","metaTitle":"L7912ACV-DG - STMicroelectronics -12V Fixed Negative","metaDescription":"L7912ACV-DG from STMicroelectronics: -12V fixed output, 1.5A, TO-220 through-hole, PSRR 60dB at 120Hz. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"60dB (120Hz)","Series":"-","Package":"Tube","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"1.5A","Base Product Number":"L7912","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 (Typ)","Voltage - Output (Max)":"-","Supplier Device Package":"TO-220","Current - Quiescent (Iq)":"3 mA","Voltage - Output (Min/Fixed)":"-12V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8100","priceTiers":[{"qty":1,"price":"$0.85000","currency":"USD"},{"qty":10,"price":"$0.74500","currency":"USD"},{"qty":25,"price":"$0.70000","currency":"USD"},{"qty":100,"price":"$0.57120","currency":"USD"},{"qty":250,"price":"$0.53060","currency":"USD"},{"qty":500,"price":"$0.45156","currency":"USD"},{"qty":1000,"price":"$0.37275","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1cec72d055257a6e2d03b4342d6041cf.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/L7912ACV-DG/alternatives.json"},"ai":{"faq":[{"question":"Is L7912ACV-DG equivalent to L7912AV?","answer":"Both share the base number L7912, fixed -12 V output, and TO-220 package. The L7912AV is a standard-grade version; the L7912ACV-DG carries the 'C' suffix which typically indicates a different temperature range or screening level. Compare the datasheet operating temperature range and output voltage tolerance for your specific design before substituting."},{"question":"What is the PSRR of L7912ACV-DG and why does it matter?","answer":"The PSRR is 60 dB at 120 Hz. That means a 1 V ripple on the input is attenuated to about 1 mV at the output at line frequency — relevant when the regulator feeds a sensitive analog negative rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/L7912ACV-DG","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/L7912ACV-DG when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T18:02:58.110Z","lastPublished":"2026-07-17T18:02:58.110Z","indexable":true}}