{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BD3925FP-CE2","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"BD3925FP-CE2","canonicalUrl":"https://icboms.com/rohm/BD3925FP-CE2","factsUrl":"https://icboms.com/api/mcp/products/BD3925FP-CE2","rawCanonicalId":null},"summary":{"shortDescription":"ROHM Semiconductor BD3925FP-CE2 adjustable LDO regulator, 500 mA output, 55 dB PSRR at 120 Hz, 36 V input max, TO-252-5 package, active lifecycle.","salesMarkdown":"The BD3925FP-CE2 delivers 55 dB of power-supply rejection at 120 Hz, the fundamental ripple frequency from a full-wave rectified line. That means a 1 Vpp ripple on the input is attenuated to roughly 1.8 mVpp on the output — clean enough to feed sensitive analog front-ends or microcontroller ADCs without additional post-filtering. ## Load and headroom envelope Rated for 500 mA continuous output with a maximum input voltage of 36 V, this LDO covers the common automotive battery rail (12 V nominal, up to 36 V during load-dump transients). Dropout voltage is 0.48 V max at 200 mA load, so a 5 V output rail needs only 5.48 V at the input to stay in regulation — useful when the battery dips during cold-crank. Quiescent current is 90 µA typical, low enough for always-on modules like body controllers or keyless-entry receivers that draw from the battery even when the ignition is off. The output is adjustable via external feedback resistors, with a tracking minimum voltage that follows the reference. Enable pin allows the regulator to be shut down entirely, cutting Iq to near zero in sleep modes. ## Temperature grade and deployment context This qualifies the part for under-hood electronics, engine-control modules, and transmission controllers where ambient temperatures exceed 105°C. The TO-252-5 (DPak) package with exposed tab allows the die heat to be conducted to a PCB copper plane; the tab is the ground path, so the thermal pad on the board must be tied to the ground plane with multiple vias for effective heat spreading.","metaTitle":"ROHM BD3925FP-CE2 LDO Regulator, 500 mA, 55 dB PSRR","metaDescription":"ROHM BD3925FP-CE2 adjustable LDO regulator, 500 mA output, 55 dB PSRR at 120 Hz, 36 V input max, TO-252-5. Active, ROHS3 compliant. 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":"55dB (120Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Adjustable (Fixed)","Mounting Type":"Surface Mount","Package / Case":"TO-252-5, DPak (4 Leads + Tab), TO-252AD","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"500mA","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TA)","Voltage - Input (Max)":"36V","Voltage Dropout (Max)":"0.48V @ 200mA","Supplier Device Package":"TO-252-5","Current - Quiescent (Iq)":"90 µA","Voltage - Output (Min/Fixed)":"Tracking"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.39","priceTiers":[{"qty":1,"price":"$6.39000","currency":"USD"},{"qty":10,"price":"$5.77000","currency":"USD"},{"qty":25,"price":"$5.50200","currency":"USD"},{"qty":100,"price":"$4.77740","currency":"USD"},{"qty":250,"price":"$4.56268","currency":"USD"},{"qty":500,"price":"$4.16008","currency":"USD"},{"qty":1000,"price":"$3.79800","currency":"USD"},{"qty":2000,"price":"$3.79800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ba9b42d6d6f3218d9df220c9b37eaaff.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BD3925FP-CE2/alternatives.json"},"ai":{"faq":[{"question":"How can I order the BD3925FP-CE2 or check availability?","answer":"The BD3925FP-CE2 is an active ROHM Semiconductor part available through authorized distribution. No minimum order quantity restrictions apply for standard reel quantities."},{"question":"What is the PSRR of the BD3925FP-CE2 and why does 120 Hz matter?","answer":"The BD3925FP-CE2 provides 55 dB of power-supply rejection at 120 Hz. This frequency is the dominant ripple component from a full-wave bridge rectifier running on 60 Hz mains, or from the second harmonic of a 50 Hz line. A 55 dB rejection ratio means the output ripple from a 1 Vpp input ripple is reduced to about 1.8 mVpp, which is clean enough for most automotive sensor and MCU supply rails without an additional LC filter stage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/BD3925FP-CE2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/BD3925FP-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}}