{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2931S-5.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2931S-5.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2931S-5.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2931S-5.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2931S-5.0/NOPB, positive fixed-output LDO regulator, 5V, 100mA, 0.3V dropout at full load, 55dB PSRR at 120Hz, -40°C to 85°C, DDPAK/TO-263-3 surface-mount package.","salesMarkdown":"## 5 V fixed output, 100 mA — the always-on rail regulator It is built for always-on or sensor supply rails in automotive and industrial systems where the input bus can swing up to 26 V — direct connection to a 24 V battery or a 12 V rail without a pre-regulator is within spec. The 55 dB PSRR at 120 Hz is the headline spec for this class: it attenuates the 100/120 Hz ripple from a rectified AC or a switching pre-regulator, keeping the output clean for analog or microcontroller supply. ## Dropout and headroom — 0.3 V at full load Maximum dropout is 0.3 V at 100 mA output. That means the input must stay above 5.3 V to maintain regulation — a 12 V battery at 11 V during cranking still holds margin. Below that threshold the output tracks the input minus dropout, and the PSRR drops off. Quiescent current is 1 mA typical, rising to 15 mA maximum under fault or heavy load. For a battery-backed always-on rail, the 1 mA Iq is the standing draw that must be included in the sleep-mode budget. ## Protection set — over-temp, reverse polarity, short circuit The LM2931S-5.0/NOPB integrates over-temperature shutdown, reverse polarity protection, and short-circuit current limiting. In an automotive environment where a load-dump transient or a miswired battery connection is a real event, these protections prevent the regulator from failing open or shorting the input rail. ## D²Pak — thermal pad required","metaTitle":"LM2931S-5.0/NOPB LDO Regulator, 5V Fixed, 100mA, TO-263-3","metaDescription":"Texas Instruments LM2931S-5.0/NOPB is a 5V fixed-output LDO rated 100mA with 55dB PSRR at 120Hz. D²Pak package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"55dB (120Hz)","Series":"-","Package":"Tube","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-263-4, D²Pak (3 Leads + Tab), TO-263AA","Product Status":"Active","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":"DDPAK/TO-263-3","Current - Quiescent (Iq)":"1 mA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.6600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/bc5f9d253d87c0f5bb975d3751d9071d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2931S-5.0%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Is LM2931S-5.0/NOPB a direct replacement for LM2931S-5.0?","answer":"The LM2931S-5.0/NOPB is the lead-free / RoHS-compliant version of the original LM2931S-5.0. The electrical specs — 5 V fixed output, 100 mA, 0.3 V dropout, 55 dB PSRR — are identical. The /NOPB suffix indicates no lead (Pb) in the package finish. It is a drop-in replacement on the same PCB footprint."},{"question":"What is the typical application for LM2931S-5.0/NOPB in automotive designs?","answer":"It is used as a post-battery or post-switcher LDO for always-on 5 V rails — supplying microcontrollers, CAN transceivers, or sensor modules that need a clean, regulated 5 V from a 12 V or 24 V bus. The 26 V input max and reverse-polarity protection make it suitable for direct battery connection in cabin or chassis-domain electronics."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2931S-5.0-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2931S-5.0-NOPB 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}}