MAX20751

NOT RECOMMENDED FOR NEW DESIGNS

MAX20751

Multiphase Master with PMBus Interface and Internal Buck Converter

NOT RECOMMENDED FOR NEW DESIGNS

MAX20751: Typical Operating Circuit slide

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Features

Increased Power Density with Fewer External Components Needed
- Scalable, Multiphase Solution
- Compatibility with Coupled Inductors Enables Fast Transient Response and Reduced C_OUT
- Integrated Internal Switching Regulator to Power Smart Slaves
Optimized Component Performance and Efficiency with Reduced Design-In Time
- PMBus-Compliant Interface for Telemetry and Power Management
- Field-Programmable Memory to Allow Storage of Desired Configuration Parameters
- Fault Logging
Comprehensive System and IC Self-Protection Features Promote Increased Power-Supply Reliability
- Overcurrent and Overtemperature
- Boost Voltage UVLO
- VX Short to Ground or V_DDH Detection
- Phase-Current Steering for Thermal Balancing
36-Pin (6mm × 6mm) QFN Package

Additional Details

The MAX20751 PMBus^™-compliant multiphase master IC, with extensive status and parameter monitoring, is capable of driving up to four smart-slave integrated power devices.

Utilizing Maxim’s smart-slave ICs, the device provides a high-density and flexible solution that can be tailored to a range of power loads used in communication equipment. Proprietary-coupled inductors, recommended to reduce the effective inductor value without excessive ripple current, results in improved transient response and reduction in the number of output capacitors required.

The device incorporates current reporting, temperature monitoring, fault detection, and PMBus support. Overcurrent and overtemperature faults are detected by the individual smart slaves and faults communicated through the master IC. The highest junction temperature is reported, both before and after smart-slave regulation.

The device features an integrated switching regulator that can optionally be used to supply the V_DD rail for the master controller and smart-slave devices to reduce the power-rail requirements and simplify the regulator design.

Applications

Communication, Networking, Servers, and Storage Equipment: ASICs, Memory V_DDQ, Microprocessor Chipsets, and other High-Current Digital ICs

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

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FAQs

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Part Models 2

1ku List Price Starting From $4.23

Technical Documents 5

MAX20751: Multiphase Master with PMBus Interface and Internal Buck Converter Data Sheet (Rev.2) 03/20/2015

MAX20751 Reliability Data 01/12/2023

UG-5861: EE-SIM Design and Simulation Environment User Guide 05/05/2014

UG-5981: PowerTool MAXPOWERTOOL002# Quick Start Guide 07/10/2023

UG-5941: MAX20751 PMBus Implementation Guide 03/13/2015

Reference Materials 1

MAX20751 GitHub Linux Driver Source Code 09/09/2024

Design Resources 2

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX20751EKX+	36-LFCSP-6X6X0.9	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
MAX20751EKX+T	36-LFCSP-6X6X0.9	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

MAX20751EKX+
Pin/Package Drawing
36-LFCSP-6X6X0.9
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

MAX20751EKX+T
Pin/Package Drawing
36-LFCSP-6X6X0.9
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

Software 1

MAX20751 GitHub Linux Driver Source Code NEW

View Evaluation Software

Companion Parts 1

Parts	Product Life Cycle	Description
Smart Power Stages (FET and FET Driver)1
VT1697SB	PRODUCTION	Smart Slave IC with Integrated Current and Temperature Sensors

MAX20751S1VKIT

Evaluation Kit for the MAX20751/VT1697SB

MAX20751S1VKIT

Evaluation Kit for the MAX20751/VT1697SB

Features and Benefits

MAX20751 Master Switch-Mode Controller
Up to Four Interleaved Power Stages
Up to 100A Output Current
PMBus Interface
Digital Telemetry and Control
Patented Synchronous Buck Topology Using Coupled Inductors
Smaller Size
Higher Efficiency
Reduced Output Capacitance
300kHz to 800kHz Switching Frequency
7V to 16V Input Voltage Range
All Ceramic Capacitor Output Capacitors
Proven PCB Layout
Fully Assembled and Tested

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Product Detail

The MAX20751S1VKIT# evaluation kit (EV kit) is a proven application-circuit design for the MAX20751 DC-DC power-supply controller and the VT1697SB power train. The EV kit is a programmable-output, 4-phase switching regulator with a PMBus™ interface. The IC controls up to four power trains to generate a single output voltage. The EV kit can be used as a stand-alone board, if desired. However, to take full advantage of the IC’s capabilities, the user must connect the EV kit to a PC using the MAXPOWERTOOL002 (PowerTool™), Maxim’s USB-to-PMBus interface dongle for power products. The PowerTool is Windows XP-^®, Windows Vista-^®, and Windows 7-compatible software that provides a simple graphical user interface (GUI) for exercising the features of the IC. The PowerTool GUI allows a PC to control the PMBus interface and to collect real-time data from the EV kit.

The EV kit contains a fully functional PCB assembly and is capable of delivering up to 100W of continuous 0.6V to 1.52V power output from a 7V to 16V input supply.

The PowerTool is sold separately and contains a USB cable (to connect PC to dongle) and a ribbon cable (to connect dongle to EV kit).

The EV kit also evaluates the VT1697SB smart slave IC with integrated current and temperature sensors. The VT1697SB is a features-rich smart slave IC designed to work with Maxim’s master switch-mode power-supply controller to implement a high-density multiphase voltage regulator.

Applications

Communication, Networking, Servers, and Storage Equipment: ASICs, Memory VDDQ, Microprocessor Chipsets, and other High-Current Digital ICs

MAXPOWERTOOL002

USB-to-PMBus Interface Dongle for Power Products

MAXPOWERTOOL002

USB-to-PMBus Interface Dongle for Power Products

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Product Detail

The MAXPOWERTOOL002# is an interface adapter between a host PC (IBM™-compatible) and Analog Devices' PMBus compatible eval boards for power solutions such as hot swaps, 12V multiphase controllers, and 12V point of load devices. The interface to the host PC is a standard type-A to mini-B USB cable. The interface to the eval board is through a 16-pin ribbon cable that carries the PMBus commands.

The MAXPOWERTOOL002# is intended to be used with Analog Devices’s Digital PowerTool GUI, and it works with the following devices: MAX20751, MAX20754, MAX20710, MAX20730, MAX20743, MAX20734, MAX20796, MAX20810, MAX20815, MAX16550, MAX16545B/C.

Resources

PDF

UG-5981: PowerTool MAXPOWERTOOL002# Quick Start Guide