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MAX20751

Multiphase Master with PMBus Interface and Internal Buck Converter

Please check latest availability status for a specific part variant.

Overview

Description

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.

MAX20751: Typical Operating Circuit

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Key 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

Applications/Uses

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

Parametric Specs

See parametric specs for Step-Down Switching Regulators (405)

Part Number

V_IN
(V)

V_OUT1
(V)

Output Adjust. Method

I_OUT1
(A)

Switch Type

Synchronous Switching

Power Good Signal

DC-DC Outputs

Oper. Freq.
(kHz)

Design Tools

Package/Pins

Budgetary
Price

min

max

min

max

See Notes

MAX20751

1.71

3.63

0.5

1.52

Digital/VID

Resistor

120

External

Yes

800

EE-Sim

SAWN QFN/36

$3.39 @1k

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

MAX20751S1VKIT: Evaluation Kit for the MAX20751/VT1697SB

Quality And Environmental

Product Reliability Reports: MAX20751.pdf

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C	Material Composition

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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Tools & Models

EE-Sim: Design & Simulate MAX20751

Tools & Models

Technical Docs

Type	ID	Title
User Guide	6055	KCU1250 MGT Module Quick Start Guide
User Guide	5981	PowerTool MAXPOWERTOOL002# Quick Start Guide
User Guide	5941	MAX20751 PMBus Implementation Guide
User Guide	5861	EE-SIM Design and Simulation Environment User Guide