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MAX20743

MAX20743

Integrated, Step-Down Switching Regulator with PMBus

Monolithically Integrated, PMBus Enabled Step-Down Switching Regulator with High Power Density and Low Component Count

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Overview

Description

The MAX20743 is a fully integrated, highly efficient switching regulator with PMBus™ for applications operating from 4.5V to 16V and requiring up to 35A maximum load. This single-chip regulator provides extremely compact, high-efficiency power delivery solutions with high-precision output voltages and excellent transient response for networking, datacom and telecom equipment.

The IC offers a broad range of programmable features through either the PMBus or through a capacitor and resistor connected to a dedicated programming pin. Using this feature, the operation can be optimized for a specific application, reducing the component count and/or setting appropriate trade-offs between the regulator’s performance and system cost. Ease of programming enables using the same design for multiple applications.

The IC includes protection and telemetry features. Positive and negative cycle-by-cycle overcurrent protection and overtemperature protection ensure a rugged design. Input undervoltage lockout shuts down the device to prevent operation when the input voltage is out of specification. A status pin provides an output signal to show that the output voltage is within range and the system is regulating.

MAX20743: Block Diagram MAX20743: Block Diagram Enlarge+

Key Features

  • High-Power Density and Low Component Count
    • Overall Solution Size 509mm2 Including Inductor and Output Capacitors
    • 90.8% Peak Efficiency with VDDH = 12V and VOUT = 1V
    • Fast Transient Response: Supports Up to 300A/µs Load-Step Transients
  • Optimized Component Performance and Efficiency with Reduced Design-In Time
    • PMBus-Compliant Interface for Telemetry and Power Management
    • Voltage, Current and Temperature Reporting through Digital Bus
  • Increased Power-Supply Reliability with System and IC Self-Protection Features
    • Differential Remote Sense with Open-Circuit Detection
    • Hiccup Overcurrent Protection
    • Programmable Thermal Shutdown

Applications/Uses

  • Communications
  • Networking
  • Servers and Storage equipments

Parametric Specs

See parametric specs for Step-Down Switching Regulators (404)


Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		IOUT1
(A)		Switch TypeOper. Freq.
(kHz)		FeaturesDesign ToolsPackage/PinsBudgetary
Price
minmaxminmaxmaxSee Notes
MAX20743 4.5160.65.535Internal
400
600
800
Current Limit
Output OVP
Output UVP
PMBus
EE-Sim
FCQFN/15
$4.10 @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


MAX20743EVKIT: Evaluation Kit for the MAX20743

Technical Documents

App Note 6498 Explaining Valley Current Protection for MAX20730, MAX20733, MAX20734, MAX20735, MAX20743, and MAX20745
App Note 6042 PMBus Protocols for Controlling and Monitoring the MAX20743/MAX20730 Switching Regulators

Additional Resources

Digital PowerTool GUI Demo – Step 1: Introduction
Digital PowerTool GUI Demo – Step 2: Installation
Digital PowerTool GUI Demo – Step 3: Dashboard
Digital PowerTool GUI Demo – Step 4: Device Tabs
How to Debug PMBus and SMBus Issues - Part 1: Communication
How to Debug PMBus and SMBus Issues - Part 2: Oscilloscope Triggering

Tools & Models

  • EE-Sim: Design & Simulate MAX20743

    • Quality And Environmental

    Request Reliability Report for: MAX20743 
    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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    Technical Docs

    Reference Designs

    Type ID Title
    System Board6851MAXREFDES1126: 0.72V/20A Supply for Xilinx Ultrascale+ FPGAs
    Evaluation Board9232MAX20743EVKIT Evaluation Kit for the MAX20743