{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3966ES-ADJ/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3966ES-ADJ-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP3966ES-ADJ-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP3966ES-ADJ%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3966ES-ADJ/NOPB adjustable LDO regulator, 3A output, 1.216V to 5.1V range, TO-263-5 (DDPAK) surface-mount, -40 to 125°C, active production.","salesMarkdown":"## 3 A adjustable LDO — dropout and output range The LP3966ES-ADJ/NOPB is a single-output positive adjustable LDO regulator from Texas Instruments, delivering up to 3 A continuous current. Its output voltage is set by an external resistor divider between 1.216 V (the internal reference) and a maximum of 5.1 V, making it a fit for powering low-voltage cores, I/O rails, or post-regulation stages that need a clean, adjustable rail from a 7 V max input. Maximum dropout voltage is 1.2 V at the full 3 A load — the headroom between the input rail and the set output must stay above this across all load and temperature conditions, or the output falls out of regulation. For a 3.3 V output, the input should be at least 4.5 V to guarantee regulation at full current. ## Thermal and protection envelope The TO-263-5 (DDPAK) package has an exposed pad on the bottom — the PCB copper area under the tab sets the junction-to-ambient thermal resistance; a solid thermal via array to an inner-layer plane is expected for 3 A continuous operation at high ambient. Built-in protection includes over-current limiting, over-temperature shutdown, and short-circuit current foldback — the regulator survives a sustained output short without damage, though the junction temperature may cycle near the thermal limit. An Enable pin (active-high) allows the output to be gated by a logic signal, dropping quiescent current to near zero when the rail is not needed. ## Quiescent current and supply budget Quiescent current (Iq) is 9 mA typical, with a maximum supply current of 15 mA — this is the regulator's own draw from the input rail, independent of load. For battery-powered designs, the 9 mA Iq is non-negligible; a load switch ahead of the LDO or using the Enable pin to power-cycle the regulator when the load is idle can extend standby time.","metaTitle":"LP3966ES-ADJ/NOPB LDO Regulator, Adjustable, 3A, TO-263-5","metaDescription":"Texas Instruments LP3966ES-ADJ/NOPB adjustable LDO, 3A output, 1.2V dropout max, -40 to 125°C. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Package":"Tube","Output Type":"Adjustable","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","Voltage - Output (Max)":"5.1V","Supplier Device Package":"DDPAK/TO-263-5","Current - Quiescent (Iq)":"9 mA","Voltage - Output (Min/Fixed)":"1.216V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.73","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.73000","currency":"USD"},{"qty":10,"price":"$6.04500","currency":"USD"},{"qty":25,"price":"$5.71440","currency":"USD"},{"qty":100,"price":"$4.95250","currency":"USD"},{"qty":250,"price":"$4.69856","currency":"USD"},{"qty":500,"price":"$4.21600","currency":"USD"},{"qty":1000,"price":"$3.59400","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/057d264ee5ffa31b9b463d785e360f0e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does LP3966ES-ADJ/NOPB come in?","answer":"It is supplied in a TO-263-6 (D²Pak) surface-mount package with 5 leads plus a tab, also referred to as DDPAK/TO-263-5. The package is shipped in tube form."},{"question":"How can I order LP3966ES-ADJ/NOPB or check stock?","answer":"Submit a request for a firm quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3966ES-ADJ-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/LP3966ES-ADJ-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}}