{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC3773EUHF#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC3773EUHF~4PBF","canonicalUrl":"https://icboms.com/analog-devices/LTC3773EUHF~4PBF","factsUrl":"https://icboms.com/api/mcp/products/LTC3773EUHF%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC3773EUHF#PBF synchronous buck controller, 3-phase, step-down, 3.3-36V supply, 220-560kHz switching, 38-WFQFN exposed pad, tube.","salesMarkdown":"## Three-phase synchronous buck controller for high-current POL rails The LTC3773EUHF#PBF is a three-phase synchronous step-down (buck) switching regulator controller from Analog Devices, designed for high-current point-of-load (POL) regulation where multiple output phases share the load to reduce input ripple and spread thermal dissipation. Its 3.3 V to 36 V supply range covers common intermediate bus voltages (5 V, 12 V, 24 V) found in industrial and telecom systems, and the 98.5 % maximum duty cycle allows the output to run close to the input rail — useful when the input droops under load. ## Switching frequency and control-loop flexibility The switching frequency is programmable from 220 kHz to 560 kHz via an external resistor — a lower frequency reduces switching losses in the external MOSFETs, while a higher frequency shrinks the output inductor and capacitor footprint. Control features include Enable, Power Good, and Tracking, which allow sequencing of multiple rails during power-up and fault monitoring without external logic. Synchronous rectification is built in, meaning the controller drives both the high-side and low-side external N-channel MOSFETs — this eliminates the Schottky catch diode and improves efficiency above 90 % across most of the load range, though at the cost of needing a bootstrap diode and capacitor for the top gate drive. ## Package and layout considerations for the 38-QFN The tube packaging is typical for prototype and low-volume builds; for reflow assembly the part is also orderable in tape-and-reel under a different suffix.","metaTitle":"LTC3773EUHF#PBF Buck Controller, 3-Phase, 38-QFN","metaDescription":"Analog Devices LTC3773EUHF#PBF 3-phase synchronous buck controller. 3.3V-36V input, 220-560kHz, -40 to 85°C, 38-QFN. Active, RoHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Step-Down","Topology":"Buck","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"3","Package / Case":"38-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable, Power Good, Tracking","Duty Cycle (Max)":"98.5%","Number of Outputs":"3","Output Configuration":"Positive","Frequency - Switching":"220kHz ~ 560kHz","Operating Temperature":"-40°C ~ 85°C (TA)","Synchronous Rectifier":"Yes","Supplier Device Package":"38-QFN (5x7)","Voltage - Supply (Vcc/Vdd)":"3.3V ~ 36V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.91","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$11.91000","currency":"USD"},{"qty":10,"price":"$10.75700","currency":"USD"},{"qty":25,"price":"$10.25640","currency":"USD"},{"qty":100,"price":"$8.90570","currency":"USD"},{"qty":250,"price":"$8.50544","currency":"USD"},{"qty":500,"price":"$7.75496","currency":"USD"},{"qty":1000,"price":"$7.08000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC3773EUHF~4PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC3773EUHF~4PBF 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}}