{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"L78M09CDT-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"L78M09CDT-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/L78M09CDT-TR","factsUrl":"https://icboms.com/api/mcp/products/L78M09CDT-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics L78M09CDT-TR, positive fixed linear regulator, 9V output, 500mA output current, 35V max input, PSRR 56dB at 120Hz, DPAK surface mount package, 0°C to 125°C operating temperature.","salesMarkdown":"The STMicroelectronics L78M09CDT-TR is a positive fixed linear regulator delivering a regulated 9 V output at up to 500 mA. It takes an unregulated DC input up to 35 V and holds the output steady — no external programming resistors needed, the voltage is fixed. The 56 dB PSRR at 120 Hz tells you it knocks down ripple from a rectified mains supply, so downstream analog or logic circuits see a clean rail. Protection features include overcurrent, overtemperature, and short-circuit — the part shuts itself down before it burns, which matters in a board that might see a load fault. The DPAK surface-mount package (TO-252-3, two leads plus tab) is a common footprint for medium-current linear regulators. The tab is the output, so the PCB copper plane acts as the heatsink — no separate heatsink required at 500 mA if the input-output differential stays moderate. ## Sourcing and lifecycle — still a current-production part","metaTitle":"STMicroelectronics L78M09CDT-TR Linear Regulator, 9V Fixed","metaDescription":"ST L78M09CDT-TR positive fixed linear regulator, 9V output, 500mA, 35V max input, PSRR 56dB at 120Hz, DPAK surface mount, active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"56dB (120Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","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)":"35V","Supplier Device Package":"DPAK","Current - Quiescent (Iq)":"6 mA","Voltage - Output (Min/Fixed)":"9V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.71","priceTiers":[{"qty":1,"price":"$0.71000","currency":"USD"},{"qty":10,"price":"$0.62900","currency":"USD"},{"qty":25,"price":"$0.59040","currency":"USD"},{"qty":100,"price":"$0.48190","currency":"USD"},{"qty":250,"price":"$0.44764","currency":"USD"},{"qty":500,"price":"$0.38096","currency":"USD"},{"qty":1000,"price":"$0.31448","currency":"USD"},{"qty":2500,"price":"$0.31448","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b14bc31fbed4d5d7828d19983fc0d5e4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/L78M09CDT-TR/alternatives.json"},"ai":{"faq":[{"question":"What is L78M09CDT-TR's listed PSRR?","answer":"The power supply rejection ratio is 56 dB at 120 Hz. That means ripple from a full-wave rectified mains supply (100/120 Hz) is attenuated by a factor of roughly 630, giving a clean DC output for sensitive loads."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/L78M09CDT-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/L78M09CDT-TR 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}}