{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"REG1117FA-2.5/500","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"REG1117FA-2.5-500","canonicalUrl":"https://icboms.com/texas-instruments/REG1117FA-2.5-500","factsUrl":"https://icboms.com/api/mcp/products/REG1117FA-2.5%2F500","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments REG1117FA-2.5/500 LDO voltage regulator, fixed 2.5V output, 1A output, DDPAK/TO-263-3 surface-mount package, -40°C to 125°C.","salesMarkdown":"## 1A fixed 2.5V LDO for industrial and automotive rails The REG1117FA-2.5/500: Its 1.55V maximum dropout at full load means the input must stay above roughly 4.05V to maintain regulation — a 5V rail provides comfortable headroom, while a 3.3V rail would not sustain the output. The -40°C to 125°C operating range qualifies it for under-hood automotive, industrial motor drives, and outdoor telecom equipment where ambient temperatures exceed commercial limits. ## PSRR and protection for noise-sensitive loads Built-in over-current and over-temperature protection allow the part to survive a sustained short on the output or a high-temperature environment without external crowbar or thermal shutdown circuitry. The 10 mA quiescent current is typical for a 1A-class LDO; it contributes roughly 1% efficiency loss at full load, but the trade-off is faster transient response compared to micropower regulators. ## Board integration: DDPAK thermal pad and footprint ROHS3 compliant with no exemption conflicts for lead-free reflow profiles.","metaTitle":"TI REG1117FA-2.5/500 LDO Regulator, 2.5V Fixed, 1A","metaDescription":"Texas Instruments REG1117FA-2.5/500: 1A low-dropout regulator, fixed 2.5V output, 62dB PSRR, -40°C to 125°C, DDPAK/TO-263-3. Active lifecycle, ROHS3.","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-263-4, D²Pak (3 Leads + Tab), TO-263AA","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":"DDPAK/TO-263-3","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.16","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.16000","currency":"USD"},{"qty":10,"price":"$3.73600","currency":"USD"},{"qty":25,"price":"$3.53200","currency":"USD"},{"qty":100,"price":"$3.06120","currency":"USD"},{"qty":250,"price":"$2.90424","currency":"USD"},{"qty":500,"price":"$2.60596","currency":"USD"},{"qty":1000,"price":"$2.22150","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/72b8f81fb770a584c1e1b39523edfc3b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What does the 62 dB PSRR at 120 Hz mean for my circuit?","answer":"The 62 dB PSRR figure means the regulator attenuates 120 Hz ripple (full-wave rectified mains) by a factor of approximately 1250. If the input has 100 mV of 120 Hz ripple, the output will see less than 80 µV of that ripple — adequate for powering 16-bit ADCs or precision analog circuits without additional post-filtering."},{"question":"What input voltage does the REG1117FA-2.5/500 need to maintain a clean 2.5V output?","answer":"With a maximum dropout voltage of 1.55V at 1A, the input must stay above 4.05V (2.5V + 1.55V) across all load and temperature conditions. A 5V ±5% rail provides safe margin; a 3.3V rail cannot sustain the output. At lighter loads the dropout is lower, but the worst-case 1.55V figure governs the design."},{"question":"What compliance documentation does Texas Instruments provide for this part?","answer":"Texas Instruments provides ROHS3 compliance (exemption-free lead-free status) for the REG1117FA-2.5/500. Standard TI documentation includes the datasheet, PCN notifications, and material composition declarations available through their product page."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/REG1117FA-2.5-500","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/REG1117FA-2.5-500 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}}