{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3873ESX-3.3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3873ESX-3.3","canonicalUrl":"https://icboms.com/texas-instruments/LP3873ESX-3.3","factsUrl":"https://icboms.com/api/mcp/products/LP3873ESX-3.3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3873ESX-3.3 LDO regulator, 3A output, fixed 3.3V, 1.2V dropout at 3A, PSRR 73dB~57dB at 120Hz, DDPAK/TO-263-5, active.","salesMarkdown":"## 3A LDO with 1.2V dropout — the headroom math The LP3873ESX-3.3 is a 3A fixed-output LDO from Texas Instruments. That margin shrinks if the input sees ripple or IR drop from the board trace. ## PSRR profile — clean rail for sensitive analog PSRR is specified at 73dB to 57dB at 120Hz. That 16dB spread across the band means the regulator attenuates 120Hz ripple from a rectified AC source by a factor of ~4500x at the low end, dropping to ~700x at the upper edge. For an ADC reference or an op-amp front-end, this keeps supply-induced spurs below the noise floor of a 16-bit converter on a 3.3V rail. ## Industrial temp range and protection suite Rated -40°C to 125°C operating junction temperature, the LP3873ESX-3.3 suits outdoor telecom, motor-drive control, or under-hood automotive modules where ambient heat exceeds 85°C. On-chip protection covers over-current, over-temperature, and short-circuit — the regulator folds back current during a fault and recovers when the junction cools, so a momentary load short does not latch the rail off. ## DDPAK-5 package — thermal and layout notes The DDPAK/TO-263-5 package (5 leads plus tab) has an exposed metal paddle on the bottom. The enable pin (Control Features: Enable) allows sequencing; pulling it low shuts the output off, reducing quiescent current to near zero.","metaTitle":"LP3873ESX-3.3 3A LDO, 3.3V Fixed, DDPAK-5, PSRR 73dB","metaDescription":"Texas Instruments LP3873ESX-3.3 LDO regulator, 3A output, 1.2V dropout at 3A, PSRR 73dB~57dB at 120Hz. Active production. Quoted 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-263-6, D²Pak (5 Leads + Tab), TO-263BA","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"3A","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)":"1.2V @ 3A","Current - Supply (Max)":"15 mA","Supplier Device Package":"DDPAK/TO-263-5","Current - Quiescent (Iq)":"9 mA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.39","stockQuantity":0,"priceTiers":[{"qty":70,"price":"$4.31000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9478b9b7a3e3cefd63d568dde8fcec2d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order LP3873ESX-3.3 or check availability?","answer":"Submit an RFQ for the required quantity."},{"question":"What is the PSRR of LP3873ESX-3.3?","answer":"PSRR is 73dB to 57dB at 120Hz, meaning the regulator attenuates 120Hz ripple by a factor of roughly 4500x at the low end and 700x at the upper end of that band."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3873ESX-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/LP3873ESX-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}}