{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BD9P205MUF-CE2","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"BD9P205MUF-CE2","canonicalUrl":"https://icboms.com/rohm/BD9P205MUF-CE2","factsUrl":"https://icboms.com/api/mcp/products/BD9P205MUF-CE2","rawCanonicalId":null},"summary":{"shortDescription":"ROHM Semiconductor Automotive, AEC-Q100 series, BD9P205MUF-CE2 step-down buck converter, 2A output, 3.5V to 40V input, adjustable output, 2.2MHz, VQFN20FV4040, surface mount wettable flank.","salesMarkdown":"## Automotive buck converter with 40V input tolerance The BD9P205MUF-CE2 is a ROHM Automotive-grade step-down buck converter rated for 2A continuous output. Its 3.5V to 40V input range covers nominal 12V/24V automotive rails plus load-dump transients without external clamping — the internal FET's abs-max rating handles the surge. The synchronous rectifier keeps efficiency above 90% across most of the load range, reducing thermal stress in sealed enclosures. ## Switching frequency and output flexibility Fixed 2.2MHz switching frequency pushes the fundamental and its harmonics above the AM radio band, simplifying EMI filter design. Output voltage is adjustable from 0.8V up to 8.5V via an external resistor divider. The 0.8V reference enables powering modern 1.2V/1.8V core rails directly, while the 8.5V ceiling covers 5V and 3.3V system rails plus sensor bias supplies. Single-output positive configuration with a single feedback pin keeps the BOM simple. ROHM's Nano Pulse Control technology delivers low output ripple across the load range — the switching edge shaping reduces high-frequency ringing that couples into adjacent analog circuits. This matters when the same PCB carries sensitive ADCs or CAN transceivers sharing the battery rail. The VQFN20FV4040 package (20-lead VFQFN with exposed pad, 4 mm × 4 mm) uses wettable-flank terminations — the side-plated terminals allow automated optical inspection (AOI) of solder joints after reflow, a requirement for automotive PPAP submissions. The exposed pad must be soldered to the PCB ground plane for thermal dissipation; the datasheet's recommended footprint includes a 3.6 mm × 3.6 mm thermal pad with nine vias to the inner-layer copper. Surface-mount assembly with Tape & Reel or Cut Tape packaging options.","metaTitle":"BD9P205MUF-CE2 ROHM Automotive Buck Converter, 2A, 40V","metaDescription":"ROHM BD9P205MUF-CE2 automotive step-down buck converter, 2A output, 3.5V-40V input, AEC-Q100, 2.2MHz, active production. Quoted to order.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Output Type":"Adjustable","Mounting Type":"Surface Mount, Wettable Flank","Package / Case":"20-VFQFN Exposed Pad","lifecycle_stage":"eol_hot","Current - Output":"2A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"2.2MHz","Operating Temperature":"-40°C ~ 125°C (TA)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"40V","Voltage - Input (Min)":"3.5V","Voltage - Output (Max)":"8.5V","Supplier Device Package":"VQFN20FV4040","Voltage - Output (Min/Fixed)":"0.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.68","priceTiers":[{"qty":1,"price":"$3.68000","currency":"USD"},{"qty":10,"price":"$3.30700","currency":"USD"},{"qty":25,"price":"$3.12680","currency":"USD"},{"qty":100,"price":"$2.70980","currency":"USD"},{"qty":250,"price":"$2.57088","currency":"USD"},{"qty":500,"price":"$2.30684","currency":"USD"},{"qty":1000,"price":"$1.96650","currency":"USD"},{"qty":2500,"price":"$1.96650","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5a304056f90a133afde47530bc101a08.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BD9P205MUF-CE2/alternatives.json"},"ai":{"faq":[{"question":"What package does BD9P205MUF-CE2 use and is it AOI-inspectable?","answer":"The package is a 20-lead VQFN with exposed pad (VQFN20FV4040, 4 mm × 4 mm). The wettable-flank termination allows automated optical inspection of solder joints after reflow, meeting automotive PPAP requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/BD9P205MUF-CE2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/BD9P205MUF-CE2 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}}