{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LD1117V50C","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LD1117V50C","canonicalUrl":"https://icboms.com/stmicroelectronics/LD1117V50C","factsUrl":"https://icboms.com/api/mcp/products/LD1117V50C","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LD1117V50C, fixed 5V output, 800 mA LDO regulator, 75 dB PSRR at 120 Hz, TO-220-3 through-hole package, -40°C to 125°C operating range.","salesMarkdown":"## 5V fixed rail, 800 mA — TO-220 through-hole LDO The LD1117V50C is a fixed 5V output, 800 mA low-dropout regulator from STMicroelectronics in a TO-220-3 through-hole package. Maximum dropout voltage is 1.3V at the full 800 mA load, so the input rail needs at least 6.3V to maintain regulation under worst-case conditions. Quiescent current runs 10 mA — not a micropower part, but acceptable for always-on rails where the load current dominates the thermal budget. ## 1.3V dropout at 800 mA — headroom and thermal reality At 800 mA output with 1.3V dropout, the regulator dissipates about 1.04 W. The TO-220 package with a heatsink tab can handle that, but without a copper-land heatsink on the PCB the junction will climb above 125°C quickly. Protection features include over-current and over-temperature shutdown — both are the latch-off type, so a sustained short will cycle the output until the fault clears. STMicroelectronics lists the LD1117V50C as Obsolete. The TO-220-3 footprint is standard, so a pin-compatible second-source search is practical if the volume justifies qualification.","metaTitle":"LD1117V50C — STMicro 5V 800mA LDO, TO-220, Obsolete","metaDescription":"LD1117V50C from STMicroelectronics: fixed 5V output, 800mA LDO, 75dB PSRR, TO-220-3. Obsolete — sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","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)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.7700","priceTiers":[{"qty":1,"price":"$0.80000","currency":"USD"},{"qty":10,"price":"$0.70700","currency":"USD"},{"qty":25,"price":"$0.66360","currency":"USD"},{"qty":100,"price":"$0.54170","currency":"USD"},{"qty":250,"price":"$0.50320","currency":"USD"},{"qty":500,"price":"$0.42824","currency":"USD"},{"qty":1000,"price":"$0.35350","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/494bb92f4effb270dec91ee8a399de6d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LD1117V50C/alternatives.json"},"ai":{"faq":[{"question":"How can I order LD1117V50C or request a quote?","answer":"The LD1117V50C is obsolete per STMicroelectronics. We source it through independent distribution against your BOM quantity. Submit an RFQ with your target volume and lead-time window; we confirm availability and current pricing at quote time. No stock-holding claim is made — every order is sourced per request."},{"question":"How does LD1117V50C compare to LD1117V33?","answer":"Both are from the same LD1117 base family and share the same TO-220-3 package, 800 mA output, dropout, protection features, and operating temperature range. The difference is the fixed output voltage: LD1117V50C outputs 5V, while LD1117V33 outputs 3.3V. They are not pin-compatible replacements for each other unless the downstream circuitry can tolerate the voltage change."},{"question":"What is LD1117V50C's PSRR?","answer":"75 dB at 120 Hz. This is the ripple rejection at mains frequency — a 1Vpp ripple on the input is attenuated to about 0.18 mVpp on the output. This matters when the regulator feeds analog or mixed-signal circuitry from a rectified and lightly filtered supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LD1117V50C","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LD1117V50C when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T18:03:32.890Z","lastPublished":"2026-07-17T18:03:32.890Z","indexable":true}}