{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3985IM5-4.7/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3985IM5-4.7-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP3985IM5-4.7-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP3985IM5-4.7%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3985 series LDO, fixed 4.7V output, 150mA, 0.1V dropout, SOT-23-5, surface mount, positive output, enable control.","salesMarkdown":"## Fixed 4.7V rail for noise-sensitive loads The Texas Instruments LP3985IM5-4.7/NOPB is a 150 mA fixed-output LDO delivering 4.7 V from a maximum 6 V input rail. The 0.1 V dropout at full load means the input needs only 4.8 V to stay in regulation — useful when the upstream rail is a 5 V bus with tolerance. ## PSRR and noise rejection across the band PSRR is specified at 50 dB at 1 kHz, rolling to 40 dB at 10 kHz. That's a 10 dB drop over a decade — the regulator rejects low-frequency ripple well but becomes less effective above a few kilohertz. If the load is an audio or ADC front-end drawing switching noise from a DC-DC converter upstream, the PSRR profile means you'll want a post-filter above 10 kHz to keep the supply clean. ## Quiescent current and enable for battery duty Quiescent current is 150 µA typical, with a maximum supply current of 250 µA. The Enable pin lets the system shut the regulator down entirely — pulling it low drops the load current to near zero, which matters for a battery-powered device that spends most of its time in sleep. The protection block includes over-current, over-temperature, and short-circuit shutdown, so a momentary load fault won't cascade into a rail collapse. ## SOT-23-5 footprint and temp grade The part is in a SC-74A / SOT-23-5 package (supplier device package SOT-23-5). The package is surface-mount, so the copper pad area and PCB stack-up set the thermal resistance — for 150 mA continuous at high ambient, a few vias under the pad help keep the junction below the 125°C limit.","metaTitle":"LP3985IM5-4.7/NOPB LDO, 150mA, 4.7V fixed, SOT-23-5","metaDescription":"Texas Instruments LP3985IM5-4.7/NOPB, 150mA fixed-output LDO, 4.7V, 0.1V dropout, 50dB PSRR, SOT-23-5. Active production, ROHS3. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"50dB ~ 40dB (1kHz ~ 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)":"6V","Voltage Dropout (Max)":"0.1V @ 150mA","Current - Supply (Max)":"250 µA","Supplier Device Package":"SOT-23-5","Current - Quiescent (Iq)":"150 µA","Voltage - Output (Min/Fixed)":"4.7V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.98","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.98000","currency":"USD"},{"qty":10,"price":"$0.86400","currency":"USD"},{"qty":25,"price":"$0.81160","currency":"USD"},{"qty":100,"price":"$0.66240","currency":"USD"},{"qty":250,"price":"$0.61528","currency":"USD"},{"qty":500,"price":"$0.52364","currency":"USD"},{"qty":1000,"price":"$0.41891","currency":"USD"},{"qty":2000,"price":"$0.37964","currency":"USD"},{"qty":5000,"price":"$0.37050","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2b0c4f544b067861411cda399254c5b0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of the LP3985IM5-4.7/NOPB?","answer":"PSRR is 50 dB at 1 kHz and 40 dB at 10 kHz. The regulator rejects low-frequency ripple well but the rejection drops by 10 dB over that decade, so above 10 kHz a post-filter may be needed for noise-sensitive loads."},{"question":"What package does the LP3985IM5-4.7/NOPB come in?","answer":"It ships in a SC-74A / SOT-23-5 surface-mount package, also referred to as the supplier device package SOT-23-5."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3985IM5-4.7-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/LP3985IM5-4.7-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}}