{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"REG1117A-1.8/2K5","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"REG1117A-1.8-2K5","canonicalUrl":"https://icboms.com/texas-instruments/REG1117A-1.8-2K5","factsUrl":"https://icboms.com/api/mcp/products/REG1117A-1.8%2F2K5","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments REG1117A-1.8/2K5 LDO voltage regulator, fixed 1.8V output, 1A, SOT-223-4, PSRR 62dB at 120Hz, -40°C to 125°C.","salesMarkdown":"## 1A fixed 1.8V LDO — dropout and PSRR drive the fit The REG1117A-1.8/2K5 is a fixed-output 1.8V LDO regulator rated for 1A continuous output. PSRR is 62dB at 120Hz, which is the ripple rejection figure for full-wave-rectified line noise. For a 5V rail coming off a linear pre-regulator or a quiet switching supply, this LDO cleans up the 100/120Hz hum well enough for sensitive analog loads like ADC reference or sensor bias. Quiescent current sits at 10 mA — not a micropower part, but acceptable for always-on industrial rails where the load current dominates the power budget. The 15V maximum input gives headroom for 12V or 9V intermediate buses. ## Industrial temp range and protection features The SOT-223-4 package (supplier device package) has a thermal pad on the tab — board copper area sets the effective RθJA, so the 1A output at 125°C ambient requires a reasonable PCB heatsink area to keep the junction below the absolute maximum. Built-in over-current and over-temperature protection latch the output off during a fault and auto-recover when the condition clears. ## Active lifecycle and sourcing Sourced through independent distribution channels.","metaTitle":"REG1117A-1.8/2K5 LDO Regulator, 1.8V Fixed, 1A, SOT-223-4","metaDescription":"REG1117A-1.8/2K5 LDO voltage regulator, 1.8V fixed output, 1A, SOT-223-4. Active production, ROHS3 compliant. PSRR 62dB at 120Hz. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"62dB (120Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","lifecycle_stage":"eol_hot","Current - Output":"1A","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)":"1.55V @ 1A","Supplier Device Package":"SOT-223-4","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"1.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.57","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.57000","currency":"USD"},{"qty":10,"price":"$2.31200","currency":"USD"},{"qty":25,"price":"$2.18080","currency":"USD"},{"qty":100,"price":"$1.85820","currency":"USD"},{"qty":250,"price":"$1.74476","currency":"USD"},{"qty":500,"price":"$1.52666","currency":"USD"},{"qty":1000,"price":"$1.26495","currency":"USD"},{"qty":2500,"price":"$1.23450","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/72b8f81fb770a584c1e1b39523edfc3b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is REG1117A-1.8/2K5's PSRR at 120Hz?","answer":"The REG1117A-1.8/2K5 provides 62dB of power supply ripple rejection at 120Hz. This is the typical rejection for full-wave-rectified line frequency noise, making it suitable for cleaning up a 5V rail feeding sensitive analog circuitry."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/REG1117A-1.8-2K5","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/REG1117A-1.8-2K5 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}}