{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BU21TD3WG-TR","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"BU21TD3WG-TR","canonicalUrl":"https://icboms.com/rohm/BU21TD3WG-TR","factsUrl":"https://icboms.com/api/mcp/products/BU21TD3WG-TR","rawCanonicalId":null},"summary":{"shortDescription":"ROHM Semiconductor BU21TD3WG-TR LDO regulator, fixed 2.1V output, 200mA, 70dB PSRR at 1kHz, SC-74A SOT-753 package, active, ROHS3 compliant.","salesMarkdown":"## 2.1V fixed rail, 200 mA — what the dropout and PSRR mean for the supply The BU21TD3WG-TR is a positive fixed-output LDO from ROHM, delivering 2.1 V at up to 200 mA from a 6 V max input rail. PSRR is 70 dB at 1 kHz, which attenuates 100 mVpp of 1 kHz ripple on the input down to roughly 32 µVpp at the output. For an analog front-end or a sensor bias rail, this keeps switching-regulator noise from coupling into the signal chain — the rejection drops at higher frequencies, so upstream filtering ahead of the LDO still matters above 100 kHz. ## Package footprint and board integration — SC-74A / SOT-753 / 5-SSOP This is a 5-pin surface-mount footprint with 0.95 mm pitch — the same land pattern serves all three package descriptors. The enable pin allows the regulator to be gated by a logic signal; unused, the pin should be tied to the input to keep the output active. ## Active lifecycle and compliance — sourcing posture ROHM lists the BU21TD3WG-TR as active and ROHS3 compliant.","metaTitle":"ROHM BU21TD3WG-TR LDO Regulator, 2.1V 200mA, 70dB PSRR","metaDescription":"ROHM BU21TD3WG-TR active LDO, fixed 2.1V output, 200mA, 70dB PSRR at 1kHz, SC-74A/SOT-753. ROHS3 compliant. Sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"70dB (1kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"200mA","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 85°C","Voltage - Input (Max)":"6V","Voltage Dropout (Max)":"0.6V @ 200mA","Supplier Device Package":"5-SSOP","Current - Quiescent (Iq)":"60 µA","Voltage - Output (Min/Fixed)":"2.1V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.51","priceTiers":[{"qty":1,"price":"$0.51000","currency":"USD"},{"qty":10,"price":"$0.43700","currency":"USD"},{"qty":25,"price":"$0.40800","currency":"USD"},{"qty":100,"price":"$0.32650","currency":"USD"},{"qty":250,"price":"$0.30316","currency":"USD"},{"qty":500,"price":"$0.25652","currency":"USD"},{"qty":1000,"price":"$0.19822","currency":"USD"},{"qty":3000,"price":"$0.18073","currency":"USD"},{"qty":6000,"price":"$0.16907","currency":"USD"},{"qty":15000,"price":"$0.16500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/961de4bff80f109aa5333df390aed1b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BU21TD3WG-TR/alternatives.json"},"ai":{"faq":[{"question":"How can I order BU21TD3WG-TR or check availability?","answer":"The BU21TD3WG-TR is an active ROHM part, ROHS3 compliant. It is sourced to order through independent distribution; a quote with current availability and pricing is provided on request. No stock-holding claim is made — confirm the quantity and lead time at RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/BU21TD3WG-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/BU21TD3WG-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}}