{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LD1117D33","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LD1117D33","canonicalUrl":"https://icboms.com/stmicroelectronics/LD1117D33","factsUrl":"https://icboms.com/api/mcp/products/LD1117D33","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LD1117D33, positive fixed LDO voltage regulator, 3.3V output, 800mA output current, 75dB PSRR at 120Hz, 8-SOIC (0.154\", 3.90mm Width) surface mount package, 0°C~125°C operating temperature.","salesMarkdown":"The STMicroelectronics LD1117D33 is a positive fixed-output LDO voltage regulator delivering a regulated 3.3V rail from an input up to 15V. The 800mA output current rating defines the load budget — at full load the maximum dropout is 1.2V, so the input rail needs to stay above 4.5V to maintain regulation. The 75dB PSRR at 120Hz makes this part a reasonable choice for cleaning up rectified mains ripple on an analog supply rail. ## Package and footprint — 8-SOIC reflow considerations No moisture sensitivity level is listed, so assume MSL 1 or bake per IPC/JEDEC J-STD-033 if the parts have been stored outside the dry pack. ## Protection features and quiescent current Built-in over-current and over-temperature protection reduce the need for external supervisory circuitry. The quiescent current is 10 mA — this is the current the regulator consumes to run its internal bias, which matters for battery-powered designs where the load spends time in standby. At light loads the 10 mA Iq dominates the efficiency; this part is better suited to always-on line-powered applications than to low-power sleep modes.","metaTitle":"ST LD1117D33 LDO Regulator, 3.3V Fixed, 800mA, 8-SOIC","metaDescription":"STMicroelectronics LD1117D33 positive fixed LDO voltage regulator, 3.3V output, 800mA, 75dB PSRR at 120Hz, 8-SOIC.","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":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","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":"0°C~125°C","Voltage - Input (Max)":"15V","Voltage Dropout (Max)":"1.2V @ 800mA","Voltage - Output (Max)":"-","Supplier Device Package":"8-SOIC","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/494bb92f4effb270dec91ee8a399de6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LD1117D33/alternatives.json"},"ai":{"faq":[{"question":"What is the PSRR of the LD1117D33?","answer":"The LD1117D33 has a PSRR of 75dB at 120Hz, which provides good rejection of mains-frequency ripple on the input supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LD1117D33","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LD1117D33 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}}