{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2931T-5.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2931T-5.0","canonicalUrl":"https://icboms.com/texas-instruments/LM2931T-5.0","factsUrl":"https://icboms.com/api/mcp/products/LM2931T-5.0","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2931T-5.0, fixed 5V output LDO, 100mA, 0.3V dropout at 100mA, PSRR 55dB at 120Hz, TO-220-3 through-hole, -40°C to 85°C.","salesMarkdown":"## Fixed 5 V rail with 55 dB ripple rejection — the analog supply choice The LM2931T-5.0 is a fixed 5 V output low-dropout regulator from Texas Instruments, delivering up to 100 mA with a maximum dropout of 0.3 V at full load. ## 100 mA output, 0.3 V dropout — headroom and load budget Rated for 100 mA continuous output, the 0.3 V maximum dropout at that current means the input must stay above 5.3 V to maintain regulation. That 300 mV headroom is tight for a 5 V rail fed from a 6 V battery or a lightly loaded 5.5 V supply — budget the minimum input voltage with the same care as the output current. Quiescent current is 1 mA typical, rising to 15 mA maximum under supply-fault conditions. For always-on or battery-backed loads, that 1 mA floor is worth comparing against lower-Iq LDO families if standby power is the constraint. ## Protection set and temperature grade — where it survives On-chip protection covers over-temperature, reverse polarity, and short-circuit events — three failure modes common in automotive and industrial environments where the regulator sees a raw, unregulated bus.","metaTitle":"LM2931T-5.0 5V 100mA LDO Regulator, TO-220-3, PSRR 55dB","metaDescription":"LM2931T-5.0 fixed 5V output LDO, 100mA, 0.3V dropout, PSRR 55dB at 120Hz. TO-220-3, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"55dB (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":"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)":"15 mA","Voltage - Output (Max)":"-","Supplier Device Package":"TO-220-3","Current - Quiescent (Iq)":"1 mA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/bc5f9d253d87c0f5bb975d3751d9071d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2931T-5.0/alternatives.json"},"ai":{"faq":[{"question":"What is a cross reference or replacement for the LM2931T-5.0?","answer":"No official successor or cross-reference part number is recorded for the LM2931T-5.0. For a form-fit-function substitute, look for a fixed 5 V output LDO in TO-220-3 with at least 100 mA capability, 0.3 V or lower dropout, and similar PSRR — but verify pin compatibility and compensation stability against the original design."},{"question":"Does the LM2931T-5.0 need a heatsink?","answer":"The TO-220-3 package can dissipate roughly 2 W in still air without a heatsink, depending on ambient. At 100 mA output with a 6 V input (1 V dropout × 100 mA = 100 mW dissipation), no heatsink is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2931T-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/LM2931T-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}}