{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3872EMP-3.3/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3872EMP-3.3-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP3872EMP-3.3-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP3872EMP-3.3%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3872EMP-3.3/NOPB, fixed-output LDO, 3.3V, 1.5A, 0.55V dropout, 73dB~57dB PSRR, SOT-223-5, -40°C~125°C, active, ROHS3.","salesMarkdown":"The LP3872EMP-3.3/NOPB comes in a SOT-223-5 package (supplier device package SOT-223-5, also listed as TO-261-5 / TO-261AB). The tab is the output pin and carries the bulk of the thermal dissipation — the PCB copper area under the tab sets the junction-to-ambient thermal resistance. For 1.5 A continuous load, a 1-square-inch copper pour on the top layer is a reasonable starting point; the datasheet's thermal derating curve should be consulted for the actual board stack-up and ambient temperature. The enable pin allows the output to be sequenced on and off, which is useful when the 3.3 V rail must be kept off during a processor reset or when a downstream load needs a controlled power-up. The protection features — over-current, over-temperature, and short-circuit — cover the common fault conditions a board-level power rail sees in the field. ## PSRR and ripple rejection The listed PSRR is 73 dB to 57 dB at 120 Hz — this is the ripple rejection at the fundamental of a full-wave rectified 60 Hz line. For an analog supply powering an ADC reference or a sensitive op-amp front-end, the PSRR at the switching frequency of the upstream converter (typically 100 kHz to 2 MHz) is not specified here, but the 120 Hz figure gives confidence that low-frequency mains ripple is well suppressed. ## Lifecycle and compliance It is RoHS3 compliant, so it meets the EU Restriction of Hazardous Substances directive without any exemption.","metaTitle":"LP3872EMP-3.3/NOPB LDO 3.3V 1.5A SOT-223-5","metaDescription":"Texas Instruments LP3872EMP-3.3/NOPB, fixed 3.3V output LDO, 1.5A, 0.55V dropout, 73-57dB PSRR at 120Hz, -40 to 125°C, SOT-223-5. Active, RoHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"73dB ~ 57dB (120Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-261-5, TO-261AB","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"1.5A","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)":"0.55V @ 1.5A","Current - Supply (Max)":"15 mA","Supplier Device Package":"SOT-223-5","Current - Quiescent (Iq)":"5 mA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.6","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.60000","currency":"USD"},{"qty":10,"price":"$4.13000","currency":"USD"},{"qty":25,"price":"$3.90440","currency":"USD"},{"qty":100,"price":"$3.38370","currency":"USD"},{"qty":250,"price":"$3.21016","currency":"USD"},{"qty":500,"price":"$2.88046","currency":"USD"},{"qty":1000,"price":"$2.45550","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a06c386b8d4c20f93e9cef0df17ed577.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of LP3872EMP-3.3/NOPB?","answer":"The PSRR is 73 dB to 57 dB at 120 Hz, depending on operating conditions. This is the ripple rejection at the fundamental of a full-wave rectified 60 Hz line."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3872EMP-3.3-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/LP3872EMP-3.3-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}}