{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"L7805CT","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"L7805CT","canonicalUrl":"https://icboms.com/stmicroelectronics/L7805CT","factsUrl":"https://icboms.com/api/mcp/products/L7805CT","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics L7805CT, positive fixed 5V linear regulator, 1.5A output, 62dB PSRR at 120Hz, 2V dropout at 1A, TO-204AA (TO-3) through-hole package, 0°C to 125°C operating range.","salesMarkdown":"## Fixed 5 V rail in a TO-3 can The STMicroelectronics L7805CT is a single-output positive fixed 5 V linear regulator in the TO-3 steel can. It delivers up to 1.5 A continuous with a typical dropout of 2 V at 1 A load. The 62 dB PSRR at 120 Hz attenuates mains ripple, adequate for general-purpose analog and logic supplies. ## Dropout headroom and thermal budget The 2 V dropout at 1 A sets a minimum input-to-output differential of 2 V; below that the regulator drops out of regulation. At 1.5 A output and a 7 V input (2 V dropout), the TO-3 package dissipates about 3 W. The steel can requires a heatsink — in still air the junction-to-ambient thermal resistance of the TO-3 alone is around 35–40 °C/W, which would exceed the 125 °C maximum junction temperature at that dissipation. A clip-on or bolt-on heatsink is mandatory for full-rated current. The quiescent current is 8 mA typical, which is modest for a 1.5 A linear regulator but adds to the total input current budget in battery-powered designs.","metaTitle":"STMicroelectronics L7805CT Linear Regulator, 5V Fixed, 1.5A","metaDescription":"ST L7805CT positive fixed 5V regulator, 1.5A output, 62dB PSRR at 120Hz, TO-3 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"62dB (120Hz)","Series":"-","Package":"Bulk","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-204AA, TO-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"1.5A","Base Product Number":"L7805","Protection Features":"Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"0°C ~ 125°C","Voltage - Input (Max)":"35V","Voltage Dropout (Max)":"2V @ 1A (Typ)","Voltage - Output (Max)":"-","Supplier Device Package":"TO-3","Current - Quiescent (Iq)":"8 mA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1ec3c1a4c11b806c0cf815b616dfcd1d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/L7805CT/alternatives.json"},"ai":{"faq":[{"question":"Does L7805CT require a heatsink?","answer":"At output currents above a few hundred milliamps, yes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/L7805CT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/L7805CT 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}}