{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM1117IMPX-ADJ/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM1117IMPX-ADJ-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM1117IMPX-ADJ-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM1117IMPX-ADJ%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM1117IMPX-ADJ/NOPB, adjustable positive LDO regulator, 800 mA output, 1.25 V to 13.8 V output range, 75 dB PSRR at 120 Hz, dropout 1.2 V max at 800 mA, -40°C to 125°C, SOT-223-4 package.","salesMarkdown":"## Adjustable LDO for moderate-current analog rails Its output can be set from 1.25 V up to 13.8 V using an external resistor divider, making it a flexible post-regulator for 3.3 V MCU rails, 1.8 V DDR termination, or analog supply lines that need clean, low-noise power. Maximum dropout voltage is 1.2 V at the full 800 mA load. That means the input rail must be at least 1.2 V above the programmed output voltage across the full load and temperature range. For a 3.3 V output, plan on a 4.5 V or higher input bus to guarantee regulation at high temperature. This is not an ultra-low-Iq part — it is not the right choice for battery-powered always-on circuits. It is sized for line-powered or moderate-load applications where the 5 mA Iq is a small fraction of the 800 mA load. On-chip protection includes over-current and over-temperature shutdown. The over-temperature trip protects the die during a sustained short or high ambient; the over-current limit folds back the output. No reverse-current protection is listed — if the output can be forced above the input, an external Schottky diode across the regulator is standard practice. ## SOT-223-4 footprint and thermal reality For 800 mA at high dropout, the copper area on the PCB under the tab sets the junction temperature. A 1-inch-square copper pour on the top layer, with vias to an inner ground plane, keeps the junction below 125°C at 25°C ambient. For dual-sourcing resilience, the closest functional peer is the LM1117IMPX-ADJNOPB (note the missing slash), which shares the same LM1117 core, 800 mA rating, and SOT-223 package. The only listed difference is a PSRR of 73 dB at 120 Hz versus 75 dB — a 2 dB delta that is negligible for most applications. Confirm the exact order code string for your BOM line.","metaTitle":"LM1117IMPX-ADJ/NOPB Adjustable LDO, 800 mA, 75 dB PSRR","metaDescription":"Texas Instruments LM1117IMPX-ADJ/NOPB adjustable positive LDO, 800 mA output, 75 dB PSRR at 120 Hz, -40°C to 125°C. SOT-223-4 package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"75dB (120Hz)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"800mA","Base Product Number":"LM1117","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C~125°C","Voltage - Input (Max)":"15V","Voltage Dropout (Max)":"1.2V @ 800mA","Current - Supply (Max)":"10 mA","Voltage - Output (Max)":"13.8V","Supplier Device Package":"SOT-223-4","Current - Quiescent (Iq)":"5 mA","Voltage - Output (Min/Fixed)":"1.25V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4100","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM1117IMPX-ADJ%2FNOPB/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM1117IMPX-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/LM1117IMPX-ADJ-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}