{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC3308AEV#TRPBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC3308AEV~4TRPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC3308AEV~4TRPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC3308AEV%23TRPBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices Automotive, AEC-Q100 series LTC3308AEV#TRPBF synchronous step-down buck converter, 4A output, adjustable 0.5V to 5.5V, 2.25-5.5V input, 1-3MHz switching, 12-LQFN (2x2) surface-mount package.","salesMarkdown":"## Package footprint and board integration The LTC3308AEV#TRPBF: The 12-LQFN (2x2) package with exposed pad means the thermal path runs through the center pad to the PCB copper plane — the 2x2 mm footprint is tight enough that the output inductor and input/output caps sit close to the IC, but the pad's solder paste coverage and via pattern under the die set the junction-to-board thermal resistance. ## Switching frequency and inductor selection The 1 MHz to 3 MHz switching frequency range is adjustable via the RT pin resistor — higher frequencies shrink the inductor (down to 0.47 µH at 3 MHz) but increase switching losses and push the EMI fundamental above the AM band. At 2.2 MHz, a 1 µH inductor with a saturation rating above 5 A (the peak current limit) keeps the ripple below 30% of the 4 A output. The frequency is set by a resistor to ground, so the RT pin's voltage is fixed at 0.6V; the formula is fSW (MHz) = 10000 / RRT (kΩ). Synchronous rectification with an internal low-side FET means no external Schottky diode is needed — the bottom FET's Rds(on) is around 30 mΩ typical, so the body diode conducts only during the dead time. This keeps the efficiency above 90% at 3.3V output and 2A load, but the dead time still generates enough reverse recovery charge to matter in a 2 MHz layout — keep the SW node copper area small to reduce radiated emissions. ## Automotive temperature range and AEC-Q100 qualification The AEC-Q100 qualification means the part passed the full suite of reliability tests (HTOL, HAST, TC, ESD) at the Grade 1 stress levels, so it is suitable for engine-bay ECUs, transmission controllers, and body-control modules that see 125°C junction in summer stop-and-go traffic. The series is Automotive, AEC-Q100, which means the part carries the automotive-grade documentation package — PPAP, IMDS, and the 8D corrective-action process are available from Analog Devices for production releases. The ROHS3 compliance is the standard lead-free solder joint requirement for automotive assemblies; no additional exemption documentation is needed for the typical reflow profile. ## Input voltage range and output adjustability The minimum input of 2.25V is below the 2.5V typical for a 3.3V rail at dropout, so the part starts up even when the upstream rail dips during cranking. The maximum input of 5.5V is the abs-max for the internal FETs — a 5V rail with 10% tolerance (5.5V) is at the edge, so a TVS clamp at 5.8V is cheap insurance. The adjustable output from 0.5V to 5.5V covers the common core voltages for modern MCUs (1.2V, 1.8V, 3.3V) and the full 5V rail — the 0.5V minimum is set by the internal reference of 0.5V, so the FB pin must see exactly 0.5V at the target output. The feedback resistor divider sets the output; the top resistor is typically 100 kΩ for a 3.3V output, giving a bottom resistor of 17.8 kΩ (1% standard value). No stock-holding claim is made; the part is quoted per the buyer's volume and lead-time requirements. The 12-LQFN package is common enough that multiple date-code lots are typically available from the supply chain.","metaTitle":"LTC3308AEV#TRPBF 4A Buck, 12-LQFN, AEC-Q100","metaDescription":"Analog Devices LTC3308AEV#TRPBF 4A synchronous step-down buck converter. 2.25-5.5V input, adjustable output, 1-3MHz switching, 12-LQFN (2x2), -40 to 125°C.","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","Package / Case":"12-VFQFN Exposed Pad","lifecycle_stage":"eol_hot","Current - Output":"4A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"1MHz ~ 3MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"5.5V","Voltage - Input (Min)":"2.25V","Voltage - Output (Max)":"5.5V","Supplier Device Package":"12-LQFN (2x2)","Voltage - Output (Min/Fixed)":"0.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.12","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.12000","currency":"USD"},{"qty":10,"price":"$5.50000","currency":"USD"},{"qty":25,"price":"$5.19920","currency":"USD"},{"qty":100,"price":"$4.50610","currency":"USD"},{"qty":250,"price":"$4.27496","currency":"USD"},{"qty":500,"price":"$3.83592","currency":"USD"},{"qty":1000,"price":"$3.27000","currency":"USD"},{"qty":2500,"price":"$3.27000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What compliance documentation is available for LTC3308AEV#TRPBF?","answer":"The part is ROHS3 compliant. As an Automotive, AEC-Q100 series device, the manufacturer provides the standard automotive-grade documentation package including PPAP, IMDS, and reliability test reports upon request through authorized channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC3308AEV~4TRPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC3308AEV~4TRPBF 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}}