{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT8338JMSE#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT8338JMSEPBF","canonicalUrl":"https://icboms.com/analog-devices/LT8338JMSEPBF","factsUrl":"https://icboms.com/api/mcp/products/LT8338JMSE%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT8338JMSE#PBF automotive boost DC-DC converter, AEC-Q100, 1.2A output, 40V input/output, 10-MSOP-EP exposed pad, tube package.","salesMarkdown":"## 40V boost with 150°C junction — the under-hood power rail The LT8338JMSE#PBF is an automotive-grade (AEC-Q100) step-up DC-DC converter from Analog Devices, delivering up to 1.2A from a 3V to 40V input rail. The 40V output ceiling and 150°C junction rating put it squarely in engine-bay or transmission-control power supplies where the ambient sees 105°C and the bus sees cold-crank dips to 3V. Synchronous rectification keeps efficiency above 90% across most of the load range — the internal FET replaces the usual catch diode, which matters when the board is sealed in a potting compound and every watt of dissipation has to conduct through the 10-MSOP-EP exposed pad. ## Switching frequency and inductor selection The oscillator runs from 300 kHz to 3 MHz, set by a single resistor. At 2 MHz the inductor drops to a 2.2 µH footprint — small enough for a 10 mm × 10 mm total solution — but the switching losses climb with frequency. For a 12 V input to 24 V output at 500 mA, 1 MHz is the sweet spot: the inductor is 4.7 µH and the efficiency stays above 92%. The 1.2A current limit is a peak switch limit, not a DC output limit. At high step-up ratios (5 V in to 40 V out) the average output current is lower than 1.2A by the duty cycle — roughly 150 mA at the highest ratio. The datasheet's efficiency curves show the real output capability for each VIN/VOUT pair. ## Thermal and layout — the exposed pad is the heatsink The 10-MSOP-EP package has a 3 mm × 3 mm exposed pad on the bottom. Solder that pad to a copper plane on the top layer with at least four vias into the internal ground plane — the thermal resistance from junction to ambient drops from 60°C/W with minimal copper to about 40°C/W with a 1 in² pour. Without that thermal via array, the 150°C junction rating is academic above 85°C ambient. Input and output capacitors should sit within 5 mm of the IC pins. The boost topology draws pulsed current from the input — a 10 µF ceramic at the VIN pin keeps the input ripple below 100 mV at 1.2A switching. ## Lifecycle and compliance — active, no PCN watch needed No pin-compatible second source exists for this exact part. The closest functional alternative is the LT8338IMS8E#PBF in the 8-MSOP-EP package — same boost controller core but with a different pinout and lower 1A current limit. A board spin is required to swap.","metaTitle":"LT8338JMSE#PBF Boost Converter, 1.2A, 40V, AEC-Q100","metaDescription":"LT8338JMSE#PBF Analog Devices automotive boost regulator, 1.2A output, 40V max, AEC-Q100, 10-MSOP-EP. Active production, ROHS3. Request quote.","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":"Tube","Function":"Step-Up","Topology":"Boost","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"10-TFSOP, 10-MSOP (0.118\\\", 3.00mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Current - Output":"1.2A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"300kHz ~ 3MHz","Operating Temperature":"-40°C ~ 150°C (TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"40V","Voltage - Input (Min)":"3V","Voltage - Output (Max)":"40V","Supplier Device Package":"10-MSOP-EP","Voltage - Output (Min/Fixed)":"1V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.48","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.48000","currency":"USD"},{"qty":10,"price":"$5.81700","currency":"USD"},{"qty":25,"price":"$5.49960","currency":"USD"},{"qty":100,"price":"$4.76620","currency":"USD"},{"qty":250,"price":"$4.52176","currency":"USD"},{"qty":500,"price":"$4.05738","currency":"USD"},{"qty":1000,"price":"$3.42188","currency":"USD"},{"qty":2500,"price":"$3.25078","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the maximum output current of LT8338JMSE#PBF?","answer":"The LT8338JMSE#PBF has a 1.2A peak switch current limit. The actual DC output current depends on the step-up ratio — at 12V in to 24V out it delivers approximately 500mA, while at 5V in to 40V out the output drops to about 150mA."},{"question":"What package does LT8338JMSE#PBF come in?","answer":"The LT8338JMSE#PBF is supplied in a 10-lead MSOP with exposed pad (10-MSOP-EP), 3.00mm × 3.00mm body. It ships in tube packaging."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT8338JMSEPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT8338JMSEPBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}