{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP5951MF-3.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP5951MF-3.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP5951MF-3.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP5951MF-3.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP5951MF-3.0/NOPB linear voltage regulator, fixed 3 V output, 150 mA, 0.35 V dropout, 55 µA quiescent current, SOT-23-5 package, -40°C to +125°C.","salesMarkdown":"## 150 mA fixed 3 V LDO with 55 µA Iq The LP5951MF-3.0/NOPB: The 0.35 V maximum dropout at full load means the input supply must stay above 3.35 V across the load range to keep the output in regulation — a 3.6 V lithium cell near end-of-discharge still has margin, but a 3.3 V rail does not. Quiescent current is 55 µA typical, rising to 70 µA maximum under full supply. For a battery-powered device that spends most of its life in standby with the LDO enabled, that 55 µA draw is the floor of the always-on budget — below most discrete shunt regulators but above an ultra-low-Iq part like the TPS7A02. The Enable pin lets an external controller gate the output entirely, pulling the supply current to near zero when the rail is unused. ## PSRR across the audio and switching band Power-supply rejection ratio is specified at 60 dB at 100 Hz, rolling to 50 dB at 10 kHz. This covers the ripple frequencies from mains rectification (100/120 Hz) through the fundamental of most switching regulators (hundreds of kHz to low MHz). The 10 kHz point is where many LDOs start to lose rejection — the LP5951 holds 50 dB, which attenuates a 10 mV ripple on the input to roughly 32 µV on the output. For an analog front-end or audio codec powered from a noisy 5 V bus, that rejection keeps supply-induced artifacts below the noise floor of a 16-bit converter. ## Industrial temperature range and protection The built-in over-current, over-temperature, and short-circuit protection means the regulator can survive a sustained output short without external foldback circuitry — the thermal shutdown cycles the output until the fault clears. ## SOT-23-5 board-fit and sourcing The part comes in a 5-lead SOT-23 (SC-74A) package — standard 0.95 mm pin pitch, 2.9 mm body length. No exposed thermal pad; heat dissipates through the leads and the copper traces on the PCB. For 150 mA at 3 V output from a 5 V input, the power dissipation is 0.3 W — in still air at 25°C the junction stays well below the 125°C limit with minimal copper area, but at 125°C ambient the same dissipation pushes the junction toward the ceiling. Keep the input-to-output differential as low as the dropout allows.","metaTitle":"LP5951MF-3.0/NOPB 3V 150mA LDO, SOT-23-5, Active","metaDescription":"Texas Instruments LP5951MF-3.0/NOPB fixed 3 V output LDO, 150 mA, 0.35 V dropout, 55 µA Iq, PSRR 60-50 dB, -40 to +125°C. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"60dB ~ 50dB (100Hz ~ 10kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"150mA","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"5.5V","Voltage Dropout (Max)":"0.35V @ 150mA","Current - Supply (Max)":"70 µA","Supplier Device Package":"SOT-23-5","Current - Quiescent (Iq)":"55 µA","Voltage - Output (Min/Fixed)":"3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.01","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.01000","currency":"USD"},{"qty":10,"price":"$0.90700","currency":"USD"},{"qty":25,"price":"$0.86080","currency":"USD"},{"qty":100,"price":"$0.70700","currency":"USD"},{"qty":250,"price":"$0.66092","currency":"USD"},{"qty":500,"price":"$0.58406","currency":"USD"},{"qty":1000,"price":"$0.46110","currency":"USD"},{"qty":2000,"price":"$0.43500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/86725ce707fc227949934429198b431a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of the LP5951MF-3.0/NOPB?","answer":"The power-supply rejection ratio is 60 dB at 100 Hz, decreasing to 50 dB at 10 kHz. This covers the ripple from line-frequency rectification through the switching fundamental of most DC-DC converters, attenuating input ripple by a factor of 316 to 1000× across that band."},{"question":"What package does the LP5951MF-3.0/NOPB use?","answer":"It is supplied in a 5-lead SOT-23 package, also designated SC-74A. The supplier device package is SOT-23-5."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP5951MF-3.0-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/LP5951MF-3.0-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}