{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"L4940P85","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"L4940P85","canonicalUrl":"https://icboms.com/stmicroelectronics/L4940P85","factsUrl":"https://icboms.com/api/mcp/products/L4940P85","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics L4940P85, positive fixed LDO regulator, 8.5 V output, 1.5 A, 68 dB PSRR at 120 Hz, TO-220-3 Full Pack, through hole, -40°C to 150°C.","salesMarkdown":"## 8.5 V fixed LDO in a TO-220FP — what the ratings tell you The STMicroelectronics L4940P85 is a single-output positive fixed LDO regulator delivering 8.5 V at up to 1.5 A. ## Dropout headroom and quiescent current Maximum dropout is 0.9 V at the full 1.5 A load. ## Obsolete — planning the BOM line The L4940P85 is listed as obsolete.","metaTitle":"STMicroelectronics L4940P85 LDO Regulator, 8.5 V Fixed","metaDescription":"ST L4940P85 positive fixed LDO: 8.5 V output, 1.5 A, 68 dB PSRR at 120 Hz, TO-220-3 Full Pack.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"68dB (120Hz)","Series":"-","Package":"Tube","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-220-3 Full Pack","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"1.5A","Base Product Number":"L4940","Protection Features":"Over Temperature, Reverse Polarity, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C~150°C","Voltage - Input (Max)":"17V","Voltage Dropout (Max)":"0.9V @ 1.5A","Current - Supply (Max)":"50 mA","Voltage - Output (Max)":"-","Supplier Device Package":"TO-220FP","Current - Quiescent (Iq)":"8 mA","Voltage - Output (Min/Fixed)":"8.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ac85a5940ca75f92e0e6d512206fa49e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/L4940P85/alternatives.json"},"ai":{"faq":[{"question":"What is L4940P85's PSRR specification?","answer":"PSRR is 68 dB at 120 Hz, which is typical for a linear regulator and adequate for rejecting mains-frequency ripple from a rectifier stage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/L4940P85","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/L4940P85 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}}