{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"UA78M33CDCYR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"UA78M33CDCYR","canonicalUrl":"https://icboms.com/texas-instruments/UA78M33CDCYR","factsUrl":"https://icboms.com/api/mcp/products/UA78M33CDCYR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments UA78M33CDCYR, fixed-output positive LDO regulator, 3.3 V, 500 mA, dropout 2 V max at 350 mA, PSRR 80 dB at 120 Hz, SOT-223-4, 0°C to 125°C.","salesMarkdown":"## Fixed 3.3 V rail for up to 500 mA loads The UA78M33CDCYR is a single-output positive LDO regulator from Texas Instruments that delivers a fixed 3.3 V at up to 500 mA. It is built for surface-mount assembly in the SOT-223-4 package (TO-261-4 compatible), with an operating temperature range from 0°C to 125°C. That temperature grade covers most commercial and industrial indoor gear — think PLC analog front-ends, sensor transmitter boards, or the 3.3 V digital rail inside a motor drive control card. ## Package and mounting Maximum dropout is 2 V at 350 mA load. The 80 dB PSRR at 120 Hz is the ripple-rejection figure that matters when this LDO is cleaning up a rectified line-frequency supply for an analog section. ## Protection set and sourcing posture Built-in over-current, over-temperature, and short-circuit protection mean this regulator can survive a momentary output short without latching off or failing. No external protection diode needed for most loads. The part carries an active lifecycle status and is ROHS3 compliant. There is no LTB notice — this is a current-production line you can commit to a BOM without obsolescence risk.","metaTitle":"UA78M33CDCYR 3.3V 500mA Fixed LDO, SOT-223-4","metaDescription":"UA78M33CDCYR: fixed 3.3 V output, 500 mA, 2 V dropout at 350 mA, 80 dB PSRR at 120 Hz, active status, SOT-223-4.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"PSRR":"80dB (120Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","lifecycle_stage":"eol_hot","Current - Output":"500mA","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"0°C ~ 125°C","Voltage - Input (Max)":"25V","Voltage Dropout (Max)":"2V @ 350mA","Supplier Device Package":"SOT-223-4","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.62","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.62000","currency":"USD"},{"qty":10,"price":"$0.54300","currency":"USD"},{"qty":25,"price":"$0.50960","currency":"USD"},{"qty":100,"price":"$0.41590","currency":"USD"},{"qty":250,"price":"$0.38632","currency":"USD"},{"qty":500,"price":"$0.32880","currency":"USD"},{"qty":1000,"price":"$0.26303","currency":"USD"},{"qty":2500,"price":"$0.23837","currency":"USD"},{"qty":5000,"price":"$0.23264","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b105c644f302e343adf65ffd8e701eb0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is UA78M33CDCYR obsolete or active?","answer":"The UA78M33CDCYR is listed as active with no last-time-buy notice. It is a current-production part you can specify into a new BOM without obsolescence concern."},{"question":"What package is UA78M33CDCYR?","answer":"Surface-mount SOT-223-4 (also specified as TO-261-4, TO-261AA)."},{"question":"What is UA78M33CDCYR's PSRR?","answer":"80 dB at 120 Hz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/UA78M33CDCYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/UA78M33CDCYR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}