{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP2954IS/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP2954IS-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP2954IS-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP2954IS%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP2954IS/NOPB LDO voltage regulator, fixed 5 V output, 250 mA, DDPAK/TO-263-3, surface mount, tube packaging.","salesMarkdown":"## 5 V fixed rail for always-on and transient-heavy boards The LP2954IS/NOPB is a single-output positive LDO from Texas Instruments, delivering a fixed 5 V at up to 250 mA. The 0.8 V dropout at full load means the input can sag to 5.8 V before the output falls out of regulation, which matters when the front-end supply is a loosely regulated wall wart or a battery nearing end of charge. ## Dropout, quiescent, and protection — what the numbers mean for the BOM Dropout is specified at 0.8 V maximum with 250 mA load — this is the worst-case figure across temperature, so budget at least 1 V of headroom in the input rail for margin. The quiescent current is 150 µA typical, rising to 33 mA maximum under supply current — the 150 µA figure is what the regulator draws when the load is light, making it viable for always-on microcontroller rails that spend most of their time in sleep mode. Protection features include over-current, over-temperature, and reverse polarity — the reverse-polarity clamp means a miswired battery won't instantly destroy the regulator, though an external series diode is still the safer practice for production boards. ## Package and thermal — the DDPAK exposed tab is a design input The LP2954IS/NOPB comes in a DDPAK/TO-263-3 package (also called TO-263-4, D²Pak with tab). At 250 mA with 1 V dropout, the dissipation is 250 mW; without a thermal pad, the junction will exceed 125°C in still air above 70°C ambient. The Enable control feature lets the system shut down the regulator to near-zero quiescent current when the rail is not needed.","metaTitle":"LP2954IS/NOPB 5V 250mA LDO, DDPAK/TO-263, Active","metaDescription":"Texas Instruments LP2954IS/NOPB fixed 5V LDO, 250mA output, 0.8V dropout at full load, -40°C to 125°C, active production, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Package":"Tube","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-263-4, D²Pak (3 Leads + Tab), TO-263AA","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"250mA","Protection Features":"Over Current, Over Temperature, Reverse Polarity","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"30V","Voltage Dropout (Max)":"0.8V @ 250mA","Current - Supply (Max)":"33 mA","Supplier Device Package":"DDPAK/TO-263-3","Current - Quiescent (Iq)":"150 µA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.44","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.44000","currency":"USD"},{"qty":10,"price":"$5.78500","currency":"USD"},{"qty":25,"price":"$5.46880","currency":"USD"},{"qty":100,"price":"$4.73970","currency":"USD"},{"qty":250,"price":"$4.49664","currency":"USD"},{"qty":500,"price":"$4.03482","currency":"USD"},{"qty":1000,"price":"$3.43954","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/91e8082ee7c7f75e6d9d5310885214ae.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does LP2954IS/NOPB come in?","answer":"It is supplied in a DDPAK/TO-263-3 surface-mount package (also described as TO-263-4, D²Pak with 3 leads plus tab). The exposed tab must be soldered to a PCB copper plane for thermal management."},{"question":"What protection features does LP2954IS/NOPB include?","answer":"The regulator includes over-current, over-temperature, and reverse-polarity protection. The reverse-polarity clamp prevents damage from a miswired input, though an external series diode is still recommended for production designs."},{"question":"How can I order LP2954IS/NOPB or check availability?","answer":"The LP2954IS/NOPB is sourced to order through authorized and independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP2954IS-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/LP2954IS-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}