{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LD1117DT50CTR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LD1117DT50CTR","canonicalUrl":"https://icboms.com/stmicroelectronics/LD1117DT50CTR","factsUrl":"https://icboms.com/api/mcp/products/LD1117DT50CTR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LD1117 series, LD1117DT50CTR, positive fixed 5V output LDO regulator, 800 mA output current, 1.3 V max dropout, DPAK surface-mount package, -40°C to 125°C operating range.","salesMarkdown":"## 5V fixed LDO, 800 mA, DPAK — the rail decision The LD1117DT50CTR is a positive fixed-output LDO regulator delivering 5V at up to 800 mA continuous from a maximum input of 15V. The 1.3V maximum dropout at 800 mA means the input rail needs at least 6.3V to hold regulation under full load — budget that headroom in your supply chain. With a PSRR of 75 dB at 120 Hz, this part provides meaningful ripple rejection for post-rectifier filtering or noise-sensitive 5V analog rails. The DPAK (TO-252-3) package with exposed tab lets the PCB copper plane sink heat; the 125°C junction rating supports industrial or under-hood environments without derating the output current. ## Dropout, quiescent current, and protection The 1.3V maximum dropout at 800 mA is the headroom number to design to; typical dropout is lower but the max guarantees regulation across temperature and unit variation. Quiescent current is 10 mA — not ultra-low-power, but acceptable for always-on industrial rails where the 5V bus is never shut down. Built-in over-current and over-temperature protection fold back the output under fault conditions; the regulator recovers automatically when the fault clears, which simplifies the protection scheme on the board. ## Active production, DPAK availability ROHS3 compliant per. The DPAK package is a common footprint with broad second-source coverage, reducing single-source risk on the BOM.","metaTitle":"LD1117DT50CTR STMicroelectronics 5V Fixed Output LDO, 800 mA","metaDescription":"STMicroelectronics LD1117DT50CTR: positive fixed 5V LDO, 800 mA output, 1.3V max dropout at full load, PSRR 75dB at 120 Hz, -40°C to 125°C, DPAK.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"75dB (120Hz)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Active","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":"DPAK","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8500","priceTiers":[{"qty":1,"price":"$0.85000","currency":"USD"},{"qty":10,"price":"$0.75000","currency":"USD"},{"qty":25,"price":"$0.70400","currency":"USD"},{"qty":100,"price":"$0.57470","currency":"USD"},{"qty":250,"price":"$0.53384","currency":"USD"},{"qty":500,"price":"$0.45432","currency":"USD"},{"qty":1000,"price":"$0.37502","currency":"USD"},{"qty":2500,"price":"$0.37502","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/494bb92f4effb270dec91ee8a399de6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LD1117DT50CTR/alternatives.json"},"ai":{"faq":[{"question":"Does LD1117DT50CTR require external capacitors?","answer":"Yes, like most LDOs it needs input and output capacitors for stability. The datasheet recommends a 10 µF tantalum or aluminum electrolytic on the output and a 1 µF on the input. Ceramic capacitors with adequate ESR may also work — check the stability criteria in the datasheet for your specific capacitor type."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LD1117DT50CTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LD1117DT50CTR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}