{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2931IBP-3.3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2931IBP-3.3","canonicalUrl":"https://icboms.com/texas-instruments/LM2931IBP-3.3","factsUrl":"https://icboms.com/api/mcp/products/LM2931IBP-3.3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2931 series, LM2931IBP-3.3, positive fixed 3.3V LDO regulator, 100mA output, 55dB PSRR at 120Hz, 0.3V dropout at 100mA, 6-VFBGA package, -40°C to 85°C.","salesMarkdown":"## 3.3 V fixed-output LDO — 100 mA in a 6-bump BGA The Texas Instruments LM2931IBP-3.3 is a positive fixed-output low-dropout regulator delivering 3.3 V at up to 100 mA from a maximum input of 26 V. It is part of the LM2931 family, designed for automotive and industrial applications where a regulated 3.3 V rail is needed from a battery or unregulated supply. The device integrates over-temperature, reverse polarity, and short-circuit protection, making it suitable for harsh environments where supply faults are expected. ## Dropout and PSRR — the real-world margins Maximum dropout voltage is 0.3 V at the full 100 mA load, meaning the input rail can drop to 3.6 V before the output loses regulation. This is the key spec for battery-powered designs where the supply sags under load. PSRR is 55 dB at 120 Hz, which provides effective ripple rejection from a full-wave rectified supply or a switching pre-regulator. For noise-sensitive analog loads, this keeps the 100/120 Hz ripple off the 3.3 V rail. ## Package — 6-VFBGA, 6-uSMD The LM2931IBP-3.3 is offered in a 6-bump VFBGA (6-VFBGA) package, also designated as 6-uSMD. This is a tiny BGA footprint — the bumps are under the device body, so the PCB fan-out requires fine traces and at least a two-layer board with via-in-pad or microvia capability. The surface-mount assembly profile follows standard lead-free reflow; the package is moisture-sensitive and should be baked per J-STD-020 if exposed beyond the floor life. ## Temperature grade — industrial duty ## Lifecycle — obsolete, sourced to order","metaTitle":"Texas Instruments LM2931IBP-3.3 LDO Regulator, 3.3V Fixed","metaDescription":"Texas Instruments LM2931IBP-3.3 LDO voltage regulator, fixed 3.3V output, 100mA, 55dB PSRR at 120Hz, 0.3V dropout.","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":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"6-VFBGA","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":"6-uSMD","Current - Quiescent (Iq)":"1 mA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/bc5f9d253d87c0f5bb975d3751d9071d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2931IBP-3.3/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM2931IBP-3.3?","answer":"Texas Instruments has not published an official successor or drop-in replacement for the LM2931IBP-3.3. For a new design, consider the wider LM2931 family in an active package variant, or a different LDO with matching 3.3 V fixed output, 100 mA capability, and 6-bump BGA footprint — but no direct pin-compatible equivalent is documented."},{"question":"What is the PSRR of LM2931IBP-3.3?","answer":"The power supply rejection ratio is 55 dB at 120 Hz, which effectively filters ripple from a rectified AC or switching supply."},{"question":"What package does LM2931IBP-3.3 come in?","answer":"It is supplied in a 6-VFBGA (also called 6-uSMD) surface-mount package, on Tape & Reel or Cut Tape."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2931IBP-3.3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2931IBP-3.3 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}}