{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BU6655NUX-TR","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"BU6655NUX-TR","canonicalUrl":"https://icboms.com/rohm/BU6655NUX-TR","factsUrl":"https://icboms.com/api/mcp/products/BU6655NUX-TR","rawCanonicalId":null},"summary":{"shortDescription":"ROHM Semiconductor triple LDO, BU6655NUX-TR, 200 mA per output, fixed 1.8V/2.8V/3.3V outputs, 70 dB PSRR, 95 µA quiescent current, 8-UFDFN exposed pad, VSON008X2030.","salesMarkdown":"## Triple 200 mA LDO for multi-rail sensor and analog supplies The BU6655NUX-TR: That combination — three outputs, three distinct voltages, one small footprint — targets boards that need a clean analog supply (the 3.3 V), a sensor bias rail (the 2.8 V), and a logic or I/O voltage (the 1.8 V) without dedicating separate regulators to each. ## PSRR and quiescent current — what they mean for the rail The PSRR is listed at 70 dB at 1 kHz, dropping to 65 dB at the same frequency in the other entries — the 70 dB figure is the one to budget for. At 70 dB, a 100 mVpp ripple on the input rail is attenuated to roughly 32 µVpp on the output. That matters when this LDO feeds an analog front-end or a small-signal chain where the supply noise would otherwise fold into the signal band. Quiescent current is 95 µA typical. For an always-on domain — say a sensor that wakes on an interrupt — the 95 µA draw plus the load current sets the battery drain. The 285 µA maximum supply current gives the worst-case overhead if all three outputs are loaded near their limits. ## Dropout and protection — the real-world margins Dropout voltage is specified as 0.72 V at 200 mA on one output and 0.46 V at 150 mA on another. The headroom between the input rail and each output must stay above these figures across the load range to keep the output in regulation. With a 5 V input feeding the 3.3 V rail, the margin is 1.7 V — plenty. But if the input dips toward 4.0 V, the 1.8 V rail still has 2.2 V headroom while the 3.3 V rail has only 0.7 V, which is tight against the 0.72 V dropout at full load. Over-current and over-temperature protection are built in — the part shuts down before the junction exceeds the die rating or the output current climbs past the safe limit. The enable pin lets a system processor gate the rails in a power-up sequence. The thermal resistance depends on the board layout — the datasheet's RthJA figure assumes a standard JEDEC board with a certain copper area. For a triple LDO dissipating up to about 1.2 W (600 mA total at 2 V dropout), the exposed pad needs a solid via array to the inner ground plane. The 5.5 V input maximum means this part runs from 3.3 V, 5 V, or a lithium-ion battery directly — no pre-regulation needed.","metaTitle":"ROHM BU6655NUX-TR triple LDO, 200mA, 1.8V/2.8V/3.3V","metaDescription":"ROHM BU6655NUX-TR triple 200mA LDO with fixed 1.8V/2.8V/3.3V outputs, 70dB PSRR, 95µA Iq. Active production, ROHS3. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"70dB (1kHz), 65dB (1kHz), 65dB (1kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"8-UFDFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"200mA, 200mA, 200mA","Protection Features":"Over Current, Over Temperature","Number of Regulators":"3","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 85°C","Voltage - Input (Max)":"5.5V","Voltage Dropout (Max)":"-, 0.72V @ 200mA, 0.46V @ 150mA","Current - Supply (Max)":"285 µA","Supplier Device Package":"VSON008X2030","Current - Quiescent (Iq)":"95 µA","Voltage - Output (Min/Fixed)":"1.8V, 2.8V, 3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.82","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.82000","currency":"USD"},{"qty":10,"price":"$0.72400","currency":"USD"},{"qty":25,"price":"$0.68040","currency":"USD"},{"qty":100,"price":"$0.55510","currency":"USD"},{"qty":250,"price":"$0.51564","currency":"USD"},{"qty":500,"price":"$0.43884","currency":"USD"},{"qty":1000,"price":"$0.35107","currency":"USD"},{"qty":4000,"price":"$0.31816","currency":"USD"},{"qty":8000,"price":"$0.31050","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/262ae3edbc5eeadb170fc4d920ea0a3c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is BU6655NUX-TR's PSRR specification?","answer":"The BU6655NUX-TR has a PSRR of 70 dB at 1 kHz. At that rejection level, a 100 mVpp input ripple is attenuated to roughly 32 µVpp on the output, making it suitable for supplying noise-sensitive analog circuits."},{"question":"What compliance documentation does ROHM provide for BU6655NUX-TR?","answer":"ROHM certifies the BU6655NUX-TR as ROHS3 compliant. The standard documentation includes the datasheet, RoHS declaration, and REACH compliance information available through the supply chain."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/BU6655NUX-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/BU6655NUX-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}}