{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX20751EKX+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX20751EKX","canonicalUrl":"https://icboms.com/analog-devices/MAX20751EKX","factsUrl":"https://icboms.com/api/mcp/products/MAX20751EKX%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX20751EKX+, 4-Output Step-Down (Buck) PWM Controller, PMBus Serial Interface, 300kHz–800kHz Switching Frequency, 1.71V–3.63V Supply, -40°C to +125°C, 36-QFN (6x6) Exposed Pad, Tray.","salesMarkdown":"## 4-phase buck controller with PMBus telemetry The MAX20751EKX+ from Maxim Integrated is a 4-phase, 4-output step-down (buck) PWM controller designed for high-current processor core and memory rails. It integrates a PMBus serial interface for voltage margining, output current telemetry, and fault reporting. The switching frequency is programmable from 300kHz to 800kHz, allowing the designer to trade off inductor size against efficiency. ## Control features and output configuration Control features include phase control for interleaving, a power-good output for sequencing, and a ramp signal for slope compensation. The output configuration is positive — the controller drives external N-channel MOSFETs in a standard buck topology. Synchronous rectification is not built in; the design uses external Schottky diodes or MOSFETs for the low-side rectifier. ## Package and mounting Housed in a 36-pin VFQFN with exposed pad (6x6 mm body), the MAX20751EKX+ is surface-mount only. The exposed pad must be soldered to a ground plane for thermal dissipation — the junction-to-board thermal path relies on it. The supplier device package is 36-QFN (6x6). ## Lifecycle and sourcing The MAX20751EKX+ is listed as Active with ROHS3 compliance. No end-of-life notice or last-time-buy window has been issued.","metaTitle":"MAX20751EKX+ 4-Phase Buck Controller, PMBus, 300kHz–800kHz","metaDescription":"MAX20751EKX+ is a 4-phase step-down (buck) PWM controller with PMBus interface. Switching frequency 300kHz–800kHz. Active, ROHS3. Surface-mount 36-QFN.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tray","Function":"Step-Down","Topology":"Buck","Clock Sync":"No","Output Type":"PWM Signal","Mounting Type":"Surface Mount","Output Phases":"4","Package / Case":"36-VFQFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Phase Control, Power Good, Ramp","Number of Outputs":"4","Serial Interfaces":"PMBus","Output Configuration":"Positive","Frequency - Switching":"300kHz ~ 800kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"No","Supplier Device Package":"36-QFN (6x6)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.63V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.79","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$10.79000","currency":"USD"},{"qty":10,"price":"$9.75000","currency":"USD"},{"qty":25,"price":"$9.29640","currency":"USD"},{"qty":80,"price":"$8.07213","currency":"USD"},{"qty":230,"price":"$7.70935","currency":"USD"},{"qty":490,"price":"$7.02910","currency":"USD"},{"qty":980,"price":"$6.12211","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX20751.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the MAX20751EKX+ switching frequency range?","answer":"The switching frequency is programmable from 300kHz to 800kHz. It is set by an external resistor and is not synchronized to an external clock."},{"question":"Does MAX20751EKX+ have a replacement or equivalent?","answer":"No direct pin-compatible replacement or equivalent is listed in the official documentation. The part is currently active, so no successor has been designated. For a cross-shopping comparison, evaluate other 4-phase PMBus buck controllers from Maxim with the same 36-QFN footprint."},{"question":"What is MAX20751EKX+'s listed function?","answer":"The function is a step-down (buck) PWM controller with four outputs and four phases. It uses a PMBus serial interface for control and telemetry."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX20751EKX","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX20751EKX 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}}