{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2931ASX-5.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2931ASX-5.0","canonicalUrl":"https://icboms.com/texas-instruments/LM2931ASX-5.0","factsUrl":"https://icboms.com/api/mcp/products/LM2931ASX-5.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2931 series, Positive Fixed LDO Regulator, 5V output, 100mA, 80dB PSRR (120Hz), 0.3V dropout at 100mA, Surface Mount DDPAK/TO-263-3, -40°C to 85°C.","salesMarkdown":"## 5V fixed LDO for noise-sensitive analog rails The LM2931ASX-5.0 is a positive fixed-output low-dropout regulator delivering 5V at up to 100mA. Its 80dB PSRR at 120Hz makes it a natural choice for powering analog front-ends, sensor bias supplies, or microcontroller analog reference rails where ripple rejection matters more than raw output current. ## Dropout headroom and protection set Maximum dropout voltage is 0.3V at the full 100mA load, so the input rail can sit as low as 5.3V and still hold regulation — useful in battery-backed or post-switcher stages where the pre-regulator sags under load. Input voltage tolerance extends to 26V, giving margin for 12V or 24V industrial bus rails without a pre-regulator. On-chip protection includes over-temperature shutdown, reverse polarity blocking, and short-circuit current limiting. Existing production or repair stock can still be sourced through independent distribution, but new BOMs should qualify an alternative before the last-time-buy window closes. ## DDPAK footprint and thermal routing The DDPAK/TO-263-3 package (3 leads plus exposed tab) is the surface-mount sibling of the TO-220. The tab is the ground path and primary heat sink — the PCB copper area under it sets the junction-to-ambient thermal resistance. For 100mA continuous with a 5V to 5.3V dropout, a 1-inch-square copper pour on the bottom layer keeps the die well below the 85°C operating ceiling.","metaTitle":"LM2931ASX-5.0 5V Fixed LDO Regulator, 100mA, DDPAK, NRND","metaDescription":"LM2931ASX-5.0 from Texas Instruments: 5V fixed output LDO, 100mA, 80dB PSRR at 120Hz, DDPAK/TO-263-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"80dB (120Hz)","Series":"-","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","Product Status":"Not For New Designs","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"100mA","Base Product Number":"LM2931","Protection Features":"Over Temperature, Reverse Polarity, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C~85°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"0.3V @ 100mA","Current - Supply (Max)":"30 mA","Voltage - Output (Max)":"-","Supplier Device Package":"DDPAK/TO-263-3","Current - Quiescent (Iq)":"15 mA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.9600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/bc5f9d253d87c0f5bb975d3751d9071d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2931ASX-5.0/alternatives.json"},"ai":{"faq":[{"question":"Is LM2931ASX-5.0 obsolete or NRND?","answer":"It is not fully discontinued, but Texas Instruments advises against using it in new product designs. Existing production can still be sourced through independent distribution channels."},{"question":"What is the PSRR of LM2931ASX-5.0?","answer":"The power supply rejection ratio is 80dB at 120Hz. That level of ripple attenuation makes this regulator suitable for powering analog circuits, ADC reference buffers, or sensitive sensor supplies where 120Hz mains ripple from a rectifier stage must be suppressed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2931ASX-5.0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2931ASX-5.0 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}}