{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3985IM5-5.0/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3985IM5-5.0-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP3985IM5-5.0-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP3985IM5-5.0%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3985IM5-5.0/NOPB LDO regulator, fixed 5 V output, 150 mA, 0.1 V dropout, SC-74A/SOT-23-5, surface mount.","salesMarkdown":"## Fixed 5 V rail with 0.1 V dropout margin The LP3985IM5-5.0/NOPB: The 0.1 V maximum dropout at full load means the input can sag to 5.1 V before the output falls out of regulation — a critical margin for 5 V rails fed from a battery near its end-of-discharge or from a loosely regulated 5.5 V intermediate bus. ## PSRR profile and noise-sensitive loads Power-supply rejection ratio is 50 dB at 1 kHz, rolling off to 40 dB at 10 kHz — this is the band where switching-regulator ripple and digital clock feedthrough typically sit, so the LP3985 provides meaningful attenuation for analog front-ends, RF oscillators, or ADC reference rails powered from a noisy upstream converter. ## Protection set and control interface Built-in protection covers over-current, over-temperature, and short-circuit events — the regulator shuts down and auto-recovers when the fault clears, so a momentary output short on a test probe won't latch the rail dead. An enable pin allows the output to be gated by a GPIO or power-good signal — useful for sequencing multiple rails or shutting down the 5 V domain in a sleep state. Housed in an SC-74A (SOT-23-5) package, the LP3985IM5-5.0/NOPB occupies a small PCB footprint — the 5-pin SOT-23 fits in tight layouts where board space is at a premium. ROHS3 compliant — the NOPB suffix confirms lead-free and halogen-free construction, which clears EU and many Asian regulatory gates without an exemption expiry.","metaTitle":"LP3985IM5-5.0/NOPB LDO, 5V Fixed, 150mA, SOT-23-5","metaDescription":"Texas Instruments LP3985IM5-5.0/NOPB LDO regulator, 5V fixed output, 150mA, 0.1V dropout, 50dB PSRR, SOT-23-5. Active, ROHS3. Quoted to order.","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)":"5V"}},"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 LP3985IM5-5.0/NOPB?","answer":"The power-supply rejection ratio is 50 dB at 1 kHz, decreasing to 40 dB at 10 kHz — this attenuates typical switching-regulator ripple and digital noise on the input rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3985IM5-5.0-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/LP3985IM5-5.0-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}