{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3855ES-ADJ/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3855ES-ADJ-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP3855ES-ADJ-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP3855ES-ADJ%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3855ES-ADJ/NOPB adjustable LDO regulator, 1.5A output, 1.23V to 6.6V adjustable, 0.435V dropout max, DDPAK/TO-263-5, -40°C to 125°C.","salesMarkdown":"## 1.5 A adjustable LDO — dropout and headroom The LP3855ES-ADJ/NOPB is a positive adjustable low-dropout linear regulator from Texas Instruments, rated for 1.5 A continuous output with a maximum dropout voltage of 0.435 V at that full load. That dropout figure is the key number for rail design: the input voltage must stay at least 0.435 V above the programmed output across the entire load range, or the output falls out of regulation. With a 1.23 V minimum output and a 6.6 V maximum, it covers common logic and analog rails from 1.8 V up to 5 V. ## PSRR across the audio band Power-supply rejection ratio is listed at 73 dB to 57 dB at 120 Hz — this is the ripple rejection at the fundamental of a full-wave rectifier. The 57 dB floor at 120 Hz means upstream 100/120 Hz ripple from a bulk capacitor is attenuated by roughly 750×, which is enough to keep a 10 mVpp ripple on the input down to about 13 µVpp at the output. For sensitive analog front-ends or audio-stage rails, that buys you clean DC without a post-filter LC stage. ## Thermal and package — D²Pak on a power rail Housed in a DDPAK/TO-263-5 (D²Pak) surface-mount package with the tab as the ground and thermal path. The junction-to-ambient thermal resistance depends on the copper area under the tab — a 1-inch² pad on a 2-oz copper board typically drops RθJA below 40°C/W. With a 1.5 A load and a 1 V input-to-output differential, that is 1.5 W to dissipate; at 25°C ambient the junction stays well under the 125°C rated maximum. ## Protection and control features Built-in overcurrent, overtemperature, and short-circuit protection — the regulator folds back current during a fault and shuts down if the die exceeds the thermal limit. The enable pin lets the system designer gate the output rail from a GPIO or a supervisor IC; with the regulator disabled, quiescent current drops to the 3 mA Iq figure. Maximum supply current is 10 mA, so the control overhead is negligible against the 1.5 A load.","metaTitle":"LP3855ES-ADJ/NOPB 1.5A Adjustable LDO, TO-263-5, Active","metaDescription":"Texas Instruments LP3855ES-ADJ/NOPB adjustable LDO, 1.5A output, 0.435V dropout max at full load. Industrial temp -40°C to 125°C. 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":"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":"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)":"0.435V @ 1.5A","Current - Supply (Max)":"10 mA","Voltage - Output (Max)":"6.6V","Supplier Device Package":"DDPAK/TO-263-5","Current - Quiescent (Iq)":"3 mA","Voltage - Output (Min/Fixed)":"1.23V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.86","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.86000","currency":"USD"},{"qty":10,"price":"$6.16100","currency":"USD"},{"qty":25,"price":"$5.82400","currency":"USD"},{"qty":100,"price":"$5.04760","currency":"USD"},{"qty":250,"price":"$4.78876","currency":"USD"},{"qty":500,"price":"$4.29694","currency":"USD"},{"qty":1000,"price":"$3.66300","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/20e2006818ede4ad411421e98116bacc.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How do I get current pricing and availability for the LP3855ES-ADJ/NOPB?","answer":"This part is sourced through independent distribution channels."},{"question":"What is the PSRR of the LP3855ES-ADJ/NOPB at 120 Hz?","answer":"The power-supply rejection ratio is specified as 73 dB to 57 dB at 120 Hz. The range reflects the variation with output current and input-output differential; the lower 57 dB figure is the worst-case rejection at full load."},{"question":"What package does the LP3855ES-ADJ/NOPB come in?","answer":"It is supplied in a DDPAK/TO-263-5 (D²Pak) surface-mount package, shipped in tubes. The package has 5 leads plus a tab, with the tab as the primary thermal and electrical ground connection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3855ES-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/LP3855ES-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}}