{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LD1117V25C","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LD1117V25C","canonicalUrl":"https://icboms.com/stmicroelectronics/LD1117V25C","factsUrl":"https://icboms.com/api/mcp/products/LD1117V25C","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LD1117V25C, positive fixed-output LDO regulator, 2.5 V, 800 mA, TO-220-3 through-hole package, -40 to 125 °C operating range.","salesMarkdown":"## Fixed 2.5 V rail at 800 mA — the BOM anchor The LD1117V25C is a positive fixed-output low-dropout regulator from STMicroelectronics, delivering a regulated 2.5 V at up to 800 mA. The single-output LDO is designed for through-hole mounting in a TO-220-3 package, making it a straightforward drop-in for existing board layouts that need a clean 2.5 V rail from a 15 V maximum input. ## Dropout voltage and protection — the real-world margins Maximum dropout voltage is 1.3 V at the full 800 mA load. Quiescent current is 10 mA. ## Ripple rejection at line frequency Power-supply rejection ratio is 75 dB at 120 Hz. ## Temperature grade and package — industrial deployment The TO-220-3 package with a metal tab can be bolted to a heatsink or chassis for thermal management; junction-to-case thermal resistance is low enough that 800 mA at high dropout may still require a heatsink, depending on ambient airflow. STMicroelectronics has classified the LD1117V25C as Obsolete. For BOM lines that still specify this exact code, the only supply channel is the surplus and broker market. The TO-220-3 package and the fixed 2.5 V output are the two non-negotiable fit criteria for any replacement candidate.","metaTitle":"STMicroelectronics LD1117V25C LDO Regulator, Fixed 2.5 V","metaDescription":"Fixed 2.5 V output, 800 mA LDO regulator in TO-220-3. 75 dB PSRR at 120 Hz, -40 to 125 °C range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"75dB (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":"800mA","Base Product Number":"LD1117","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"15V","Voltage Dropout (Max)":"1.3V @ 800mA","Voltage - Output (Max)":"-","Supplier Device Package":"TO-220","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/494bb92f4effb270dec91ee8a399de6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LD1117V25C/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy LD1117V25C?","answer":"The LD1117V25C is obsolete from the manufacturer. Submit a request for quote to confirm current availability and pricing."},{"question":"What is the PSRR of LD1117V25C?","answer":"This is the ripple rejection figure at the fundamental line frequency after full-wave rectification, critical for clean DC rails in analog circuits."},{"question":"What is the closest pin-compatible alternative to LD1117V25C?","answer":"Any replacement must match the fixed 2.5 V output, the TO-220-3 pinout, and the 800 mA current rating. Parts in the same LD1117 family with different output voltages are not drop-in substitutes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LD1117V25C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LD1117V25C 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}}