{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3874EMP-3.3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3874EMP-3.3","canonicalUrl":"https://icboms.com/texas-instruments/LP3874EMP-3.3","factsUrl":"https://icboms.com/api/mcp/products/LP3874EMP-3.3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3874EMP-3.3 LDO voltage regulator, 800 mA output, 3.3 V fixed, SOT-223-5 surface-mount package, 0.35 V dropout at 800 mA, PSRR 73 dB at 120 Hz.","salesMarkdown":"## Dropout and PSRR — the two numbers that decide the rail quality The LP3874EMP-3.3 is a fixed 3.3 V output LDO rated for 800 mA continuous. PSRR is specified at 73 dB at 120 Hz, dropping to 57 dB at the same frequency — typical for a 120 Hz ripple rejection figure that holds well into the kHz range. For a 5 V rail feeding a 3.3 V analog supply, this attenuates 100 mV of 120 Hz ripple down to roughly 20 µV at the output, clean enough for a 16-bit ADC reference. ## Thermal and protection envelope Built-in over-current, over-temperature, and short-circuit protection means the regulator survives a momentary output short without latching off or exceeding the absolute-maximum junction temperature — the thermal shutdown cycle restarts when the die cools.","metaTitle":"LP3874EMP-3.3 LDO, 800 mA, 3.3 V fixed, SOT-223-5","metaDescription":"LP3874EMP-3.3 LDO regulator, 800 mA output, 3.3 V fixed, 0.35 V dropout at full load. PSRR 73 dB at 120 Hz. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"73dB ~ 57dB (120Hz)","Package":"Bulk","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-261-5, TO-261AB","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"800mA","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"7V","Voltage Dropout (Max)":"0.35V @ 800mA","Current - Supply (Max)":"15 mA","Supplier Device Package":"SOT-223-5","Current - Quiescent (Iq)":"9 mA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.42","priceTiers":[{"qty":124,"price":"$2.42000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b426b27972d06a2fc46c28285726cc7f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LP3874EMP-3.3/alternatives.json"},"ai":{"faq":[{"question":"What is the PSRR of the LP3874EMP-3.3?","answer":"PSRR is 73 dB at 120 Hz, dropping to 57 dB at the same frequency — typical for a 120 Hz ripple rejection figure that holds well into the kHz range."},{"question":"Will LP3874EMP-3.3 drop into a board designed for LP38858T-1.2/NOPB?","answer":"No — the LP38858T-1.2/NOPB is a through-hole part (TO-220 package) with a 1.2 V fixed output, while the LP3874EMP-3.3 is a surface-mount SOT-223-5 with a 3.3 V fixed output. They are not pin-compatible or voltage-compatible without a board spin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3874EMP-3.3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP3874EMP-3.3 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}}