{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC7803JMSE#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC7803JMSEPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC7803JMSEPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC7803JMSE%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC7803JMSE#PBF, low-IQ synchronous buck controller, step-down, 4.5V–40V input, 100kHz–3MHz switching, 100% duty cycle, -40°C to 150°C, 16-MSOP-EP exposed pad, tube.","salesMarkdown":"## Low-IQ synchronous buck controller for 12 V and 24 V rails The LTC7803JMSE#PBF is a low quiescent current synchronous step-down (buck) controller from Analog Devices, designed for converting 4.5 V to 40 V input rails down to a regulated positive output. It drives external N-channel MOSFETs in a single-phase synchronous topology, which means the low-side FET replaces the freewheeling diode for higher efficiency across the load range. The controller integrates clock synchronization, frequency control, and phase control, making it suitable for multi-rail systems where switching harmonics must be aligned or spread. ## 100% duty cycle — what it means for dropout The LTC7803JMSE#PBF can operate at 100% duty cycle, meaning the high-side FET can stay on continuously. This keeps the output in regulation when the input voltage sags close to the output target. ## Switching frequency: 100 kHz to 3 MHz — inductor and EMI trade-offs The switching frequency is programmable from 100 kHz to 3 MHz via the frequency control pin. Lower frequencies reduce switching losses and simplify layout but require larger inductors. ## Temperature grade and environment Rated for a junction temperature range of -40°C to 150°C, the LTC7803JMSE#PBF is specified for automotive under-hood, industrial motor drives, and outdoor telecom equipment. ## Package and thermal management Housed in a 16-lead MSOP with exposed pad (16-MSOP-EP), the thermal pad must be soldered to a PCB copper plane to dissipate heat from the internal LDO and gate drivers.","metaTitle":"LTC7803JMSE#PBF Synchronous Buck Controller, 100kHz–3MHz","metaDescription":"LTC7803JMSE#PBF step-down synchronous buck controller from Analog Devices. 4.5V–40V input, 100% duty cycle, 100kHz–3MHz switching. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Function":"Step-Down","Topology":"Buck","Clock Sync":"Yes","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"16-TFSOP (0.118\\\", 3.00mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable, Frequency Control, Phase Control","Duty Cycle (Max)":"100%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"100kHz ~ 3MHz","Operating Temperature":"-40°C ~ 150°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"16-MSOP-EP","Voltage - Supply (Vcc/Vdd)":"4.5V ~ 40V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.85","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.85000","currency":"USD"},{"qty":10,"price":"$6.15600","currency":"USD"},{"qty":25,"price":"$5.81920","currency":"USD"},{"qty":100,"price":"$5.04350","currency":"USD"},{"qty":250,"price":"$4.78484","currency":"USD"},{"qty":500,"price":"$4.29342","currency":"USD"},{"qty":1000,"price":"$3.66000","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/ltc7803.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the switching frequency range of LTC7803JMSE#PBF?","answer":"The switching frequency is programmable from 100 kHz to 3 MHz via the frequency control pin, and the controller supports external clock synchronization."},{"question":"Does LTC7803JMSE#PBF have synchronous rectification?","answer":"Yes, the LTC7803JMSE#PBF is a synchronous buck controller — it drives both high-side and low-side N-channel MOSFETs for rectification, which improves efficiency compared to an asynchronous diode-based design."},{"question":"Can LTC7803JMSE#PBF achieve 100% duty cycle?","answer":"Yes, the LTC7803JMSE#PBF supports 100% duty cycle operation. This allows the output to stay in regulation when the input voltage drops close to the output voltage, effectively eliminating dropout."},{"question":"What is the closest functional alternative to LTC7803JMSE#PBF?","answer":"The LT8390AIUFD#PBF is a buck-boost controller with a similar feature set (clock sync, synchronous rectification, transistor driver output) but operates in step-up/step-down topology and has a lower maximum duty cycle of 95% and a lower temperature rating of 125°C. The LTC7803JMSE#PBF is a pure step-down controller with 100% duty cycle and 150°C junction rating, so they are not pin-compatible drop-in replacements but serve adjacent power-conversion needs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC7803JMSEPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC7803JMSEPBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}