{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"L78L33CD-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"L78L33CD-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/L78L33CD-TR","factsUrl":"https://icboms.com/api/mcp/products/L78L33CD-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics L78L33 series fixed-output LDO regulator, L78L33CD-TR, 3.3 V, 100 mA, 30 V max input, 49dB PSRR at 120 Hz, 8-SOIC surface-mount package, Tape & Reel.","salesMarkdown":"## PSRR at 120 Hz — filtering rectified mains ripple The L78L33CD-TR: 49 dB PSRR at 120 Hz means the output attenuates full-wave-rectified mains ripple by roughly a factor of 280. Protection covers over-current, over-temperature, and short-circuit — the regulator survives a sustained output short without latching or damaging the pass transistor. ## Package and board-fit — 8-SOIC footprint Surface-mount 8-SOIC (0.154\" body width, 3.90 mm), 1.27 mm pitch — a standard footprint that routes on two-layer boards without via congestion. The supplier device package is 8-SOIC. Operating temperature range is 0 °C to 125 °C — the low end limits it to commercial/industrial ambient (not -40 °C cold-crank), but the 125 °C ceiling covers hot enclosures and self-heating at full load. ## Sourcing — active part, quoted to order Active lifecycle status from STMicroelectronics.","metaTitle":"STMicroelectronics L78L33CD-TR 3.3V 100mA LDO, 8-SOIC","metaDescription":"ST L78L33CD-TR fixed 3.3V output, 100mA LDO in 8-SOIC. 49dB PSRR at 120Hz, 30V max input, over-current/thermal/short protection.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"49dB (120Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Current - Output":"100mA","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"0°C ~ 125°C","Voltage - Input (Max)":"30V","Current - Supply (Max)":"6 mA","Supplier Device Package":"8-SOIC","Current - Quiescent (Iq)":"5.5 mA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.49","priceTiers":[{"qty":1,"price":"$0.49000","currency":"USD"},{"qty":10,"price":"$0.39800","currency":"USD"},{"qty":25,"price":"$0.36400","currency":"USD"},{"qty":100,"price":"$0.27100","currency":"USD"},{"qty":250,"price":"$0.24560","currency":"USD"},{"qty":500,"price":"$0.20326","currency":"USD"},{"qty":1000,"price":"$0.15245","currency":"USD"},{"qty":2500,"price":"$0.13982","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/49a5b1e05533ceae40201a09eef4c29f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/L78L33CD-TR/alternatives.json"},"ai":{"faq":[{"question":"What is the PSRR of L78L33CD-TR and why does it matter?","answer":"The PSRR is 49 dB at 120 Hz. This is the attenuation of ripple from a full-wave-rectified mains supply (60 Hz × 2)."},{"question":"Will L78L33CD-TR drop into a board that was specified around L78L33ABUTR without rewiring?","answer":"Pinout and package are the same 8-SOIC footprint — the only difference is the low-temperature specification. If your application does not require -40 °C operation, the L78L33CD-TR is a drop-in functional replacement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/L78L33CD-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/L78L33CD-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}}