{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3856ES-3.3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3856ES-3.3","canonicalUrl":"https://icboms.com/texas-instruments/LP3856ES-3.3","factsUrl":"https://icboms.com/api/mcp/products/LP3856ES-3.3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3856ES-3.3 LDO voltage regulator, fixed 3.3V output, 3A, DDPAK/TO-263-5 package, surface mount, -40°C to 125°C.","salesMarkdown":"## 3.3V rail at 3A — the dropout headroom decision The LP3856ES-3.3 is a single-output positive LDO regulator delivering a fixed 3.3V at up to 3A continuous from a 7V max input rail. The 0.6V max dropout at full load means the input must stay above 3.9V across the load range to keep the output in regulation — a 5V rail with 0.5V of ripple still has margin, but a 3.6V rail does not. ## PSRR across the audio band PSRR is specified at 73 dB to 57 dB at 120 Hz — the 73 dB figure at the low end of the band attenuates 120 Hz rectifier ripple by a factor of ~4500, dropping to ~700 at the upper end. For a noise-sensitive analog front-end powered from a switching preregulator, the ripple rejection below 1 kHz is strong enough that post-filtering may be unnecessary. ## Industrial temp range and protection set Operating junction temperature spans -40°C to 125°C, covering industrial ambient conditions. An enable pin and an error flag output are available for sequenced power-up and fault monitoring. ## DDPAK package — thermal pad layout note The DDPAK/TO-263-5 package (TO-263-6 with one tab) has an exposed thermal pad on the bottom. The tab is the ground path and the primary heat conduit — the PCB copper area under the pad sets the effective RθJA. A 1-square-inch 2-oz copper pour on the top layer, with thermal vias to an internal ground plane, keeps the junction below 125°C at 3A output with a 5V input.","metaTitle":"Texas Instruments LP3856ES-3.3 LDO Regulator, 3.3V 3A","metaDescription":"Texas Instruments LP3856ES-3.3 LDO, fixed 3.3V output, 3A, 73dB PSRR at 120Hz, DDPAK/TO-263-5. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","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, Error Flag","Current - Output":"3A","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TJ)","Voltage - Input (Max)":"7V","Voltage Dropout (Max)":"0.6V @ 3A","Current - Supply (Max)":"10 mA","Supplier Device Package":"DDPAK/TO-263-5","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.95","stockQuantity":0,"priceTiers":[{"qty":61,"price":"$4.95000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8dd40936af410d1f930e4add6125239b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How do I get current pricing and availability for LP3856ES-3.3?","answer":"Submit an RFQ against your BOM quantity. No stock-holding claim is made — availability is verified per inquiry."},{"question":"What is LP3856ES-3.3's listed PSRR?","answer":"PSRR is 73 dB to 57 dB at 120 Hz. The higher figure applies at the low end of the 120 Hz band, dropping to 57 dB at the upper end. This is the ripple rejection from the input to the output at that frequency."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3856ES-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/LP3856ES-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}}