{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LD1117AV18","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LD1117AV18","canonicalUrl":"https://icboms.com/stmicroelectronics/LD1117AV18","factsUrl":"https://icboms.com/api/mcp/products/LD1117AV18","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LD1117AV18, positive fixed LDO voltage regulator, 1.8V output, 1A max, 80dB PSRR at 120Hz, TO-220-3 through-hole package, 0°C to 125°C operating range.","salesMarkdown":"## Fixed 1.8V regulator for legacy 1.8V rails The STMicroelectronics LD1117AV18 is a positive fixed-output LDO voltage regulator delivering 1.8V at up to 1A continuous current. Maximum dropout voltage is 1.3V at 1A load, meaning the input must stay above 3.1V to maintain regulation at full current. The 80dB PSRR at 120Hz provides good ripple rejection from a rectified AC front-end — useful for analog or noise-sensitive loads fed from a linear pre-regulator. Quiescent current is 10 mA typical — not a low-Iq part, so it is better suited to always-on rails than battery-powered sleep circuits. Protection includes over-current and over-temperature shutdown. ## Obsolete — sourcing for legacy BOMs No official successor is recorded in the lifecycle data.","metaTitle":"ST LD1117AV18 LDO Regulator, 1.8V Fixed, 1A, TO-220-3","metaDescription":"ST LD1117AV18 positive fixed LDO regulator, 1.8V output, 1A max, 80dB PSRR at 120Hz, TO-220-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"80dB (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":"1A","Base Product Number":"LD1117","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"0°C~125°C","Voltage - Input (Max)":"15V","Voltage Dropout (Max)":"1.3V @ 1A","Voltage - Output (Max)":"-","Supplier Device Package":"TO-220","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"1.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1f53874c71a4fc18a5ab2ae913a72296.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LD1117AV18/alternatives.json"},"ai":{"faq":[{"question":"Is LD1117AV18 obsolete?","answer":"Yes, STMicroelectronics lists the LD1117AV18 as obsolete. No official replacement part number is provided in the lifecycle record."},{"question":"Can LD1117AV18 handle 1A continuous current?","answer":"Yes, the LD1117AV18 is rated for 1A continuous output current, with a maximum dropout of 1.3V at that load."},{"question":"Can LD1117AV18 be used with a heatsink?","answer":"The TO-220-3 package is designed for through-hole mounting and accepts standard TO-220 clip-on or bolt-on heatsinks. At 1A output with a 1.3V dropout, the power dissipation can reach 1.3W, so a heatsink is recommended to keep the junction within the 125°C maximum operating temperature."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LD1117AV18","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LD1117AV18 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}}