{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2931AMX-5.0","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2931AMX-5.0","canonicalUrl":"https://icboms.com/texas-instruments/LM2931AMX-5.0","factsUrl":"https://icboms.com/api/mcp/products/LM2931AMX-5.0","rawCanonicalId":null},"summary":{"shortDescription":"onsemi LM2931 series, Positive Fixed LDO Regulator, 5V output, 100mA, 80dB PSRR at 120Hz, 0.3V dropout, -40°C to 85°C, 8-SOIC, Tape & Reel.","salesMarkdown":"## Fixed 5 V rail for noise-sensitive loads The onsemi LM2931AMX-5.0 is a single-output positive LDO regulator delivering a fixed 5 V at up to 100 mA. ## Dropout and headroom Maximum dropout is 0.3 V at the full 100 mA load, so the input rail needs to stay above 5.3 V to hold regulation. That is tight enough to run off a 6 V or 7.5 V unregulated bus without wasting power as heat, but not low enough for a 5 V input — plan for at least 5.5 V minimum at the input pin under worst-case load and temperature. ## Protection that survives a field swap Built-in over-temperature shutdown, reverse polarity protection, and short-circuit current limiting mean this regulator can take the abuse of a miswired battery connection or a hot-swap glitch without dying. For a field-service repair, that is the difference between swapping the part once and coming back next week. ## Obsolete — sourcing the BOM line The LM2931AMX-5.0 is listed as obsolete.","metaTitle":"LM2931AMX-5.0 LDO Regulator, 5V Fixed, 100mA, 80dB PSRR","metaDescription":"LM2931AMX-5.0 fixed 5V LDO regulator, 100mA output, 80dB PSRR at 120Hz, -40°C to 85°C, 8-SOIC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"80dB (120Hz)","Series":"-","Package":"Tape & Reel (TR)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","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)":"30 mA","Voltage - Output (Max)":"-","Supplier Device Package":"8-SOIC","Current - Quiescent (Iq)":"15 mA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8841","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/2a3653e9203de7299037ea843354db4c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2931AMX-5.0/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between LM2931AMX-5.0 and LM2931M5.0?","answer":"The key difference is the suffix: the 'A' version (LM2931AMX-5.0) is the older, now-obsolete variant. The LM2931M5.0 is the current-production equivalent in the same 8-SOIC package. Both are fixed 5 V, 100 mA LDOs with the same pinout, but verify the dropout voltage and quiescent current on the current datasheet to ensure a drop-in swap."},{"question":"What is LM2931AMX-5.0's PSRR rating?","answer":"The LM2931AMX-5.0 provides 80 dB of power supply rejection at 120 Hz. That is the figure that matters for suppressing full-wave rectifier ripple in linear supplies feeding sensitive analog circuits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2931AMX-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/LM2931AMX-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}}