MAX20790

Smart Power-Stage IC with Integrated Current and Temperature Sensors

Single-Phase Monolithic Smart Slave IC with Best-in-Class Efficiency and High Current Density

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Overview

Features and Benefits
Product Details

Features and Benefits

Space-Optimized Solution

Monolithic, Smart Power Stage
Phase-Current Steering for Thermal Balance
Small Footprint: ~24mm²

95.6% Peak Efficiency

6-phase, 400kHz, 12V V_IN, 1.8V V_OUT

300kHz to 1.3MHz Switching Frequency
Telemetry and Fault Reporting through Controller IC PMBus

Accurate Temperature Monitoring and Reporting
Accurate Per-Phase Current Reporting
Fault_ID Indicates Type of Fault

Advanced Self-Protection Features

Supply and Boost UVLO Protection
Boost Refresh
VX Short and Overtemperature Shutdown
Fast Overcurrent Protection

Product Details

The MAX20790 is a feature-rich smart power-stage IC designed to work with Maxim’s controllers to implement a high-density multiphase voltage regulator. Multiple smart power-stage ICs plus a controller provide a compact synchronous buck converter that includes accurate individual phase current and temperature reporting through PMBus™. These smart power-stage devices include fault-protection circuits for overtemperature, VX short, and supply undervoltage lockout (UVLO). The MAX20790 immediately shuts down on fault detection, communicating the Fault_ID to the controller.

Monolithic integration and advanced packaging technology allow high-switching frequencies with significantly lower losses than conventional implementations. Phase-shedding and discontinuous conduction modes (DCM) optimize efficiency over a wide range of load currents.

The MAX20790 is available in a 12-pin FC2QFN package with an exposed top-side thermal pad (3.25mm x 7.4mm).

Applications

High Current Multiphase-Voltage Regulators
- Networking ASICs
- AI and Machine Learning ASICs
- Graphics Processors
Servers, Workstations, and Enterprise Storage
Communications and Networking Equipment
AI and Machine Learning

Product Categories

Power Management
- Smart Power Stages (FET and FET Driver)

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Product Lifecycle Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (3)

MAX20754EVKIT8

Evaluation Kit for the MAX20754/MAX20790

MAX20754EVKIT7

Evaluation Kit for the MAX20754 and MAX20790

MAX16602CL8EVKIT

Evaluation Kit for the MAX16602 and MAX20790

MAX20754EVKIT8

View Detailed Evaluation Kit Information

This MAX20754EVKIT8 evaluation kit (EV kit) demonstrates the MAX20754 PMBus™-compatible dual-output multiphase power-supply controller. The controller generates six pulse-width modulated (PWM) control signals, or “phases.” The MAX20754EVKIT8 EV kit is a single-output design, with all six phases assigned to one output. The output uses coupled inductor topologies. Coupled inductors reduce the effective inductor value and size without excessive ripple current, reducing required output capacitance, and improving transient response.

The EV kit also demonstrates the MAX20790 power-stage device; there are six MAX20790 devices, one per phase.

Applications

ASICs, DSPs, and FPGAs
Communication, Networking, Servers, and Storage Equipment
DDR Memory
Microprocessor Chipsets

Features & Benefits

Optimized for Single +10V to +16V Supply
- Onboard +3.3V Regulator (MAX17501)
Generates One Output
- Output: 6-Phase, 1V, 225A
500kHz Switching Frequency
Enable Switch
PMBus Configuration and Control
- Compatible with Maxim’s PowerTool™ GUI
- Easy Connection to PC Using MAXPOWERTOOL002 USB-to-SMBus Interface (order separately)
Status LEDs
- Power-Good
- Power-Stage Fault
- SMBus Alert
Proven PCB Layout
Compensation Scheme Optimized for High Bandwidth
Fully Tested and Assembled

MAX20754EVKIT7

View Detailed Evaluation Kit Information

This MAX20754EVKIT7 evaluation kit (EV kit) demonstrates the MAX20754 PMBus™-compatible dual-output multiphase power-supply controller. The controller generates six pulse-width modulated (PWM) control signals, or “phases.” The MAX20754EVKIT7 EV kit is a two-output design, with four phases assigned to Output 1 and the remaining two phases assigned to Output 2. Both outputs use coupled inductor topologies. Coupled inductors reduce the effective inductor value and size without excessive ripple current, reducing required output capacitance, and improving transient response.

The EV kit also demonstrates the MAX20790 power-stage device; there are six MAX20790 devices, one per phase.

Applications

ASICs, DSPs, and FPGAs
Communication, Networking, Servers, and Storage Equipment
DDR Memory
Microprocessor Chipsets

Features & Benefits

Optimized for Single +10V to +16V Supply
- Onboard +3.3V Regulator (MAX17501)
Generates Two Independent Outputs
- Output 1: 4-Phase, 1V, 150A
- Output 2: 2-Phase, 1V, 75A
500kHz Switching Frequency
Independent Enable Switches
PMBus Configuration and Control
- Compatible with Maxim’s PowerTool™ GUI
- Easy Connection to PC Using MAXPOWERTOOL002 USB-to-SMBus Interface (order separately)
Status LEDs
- Power-Good
- Power-Stage Fault
- SMBus Alert
Proven PCB Layout
Compensation Scheme Optimized for High Bandwidth
Fully Tested and Assembled

MAX16602CL8EVKIT

View Detailed Evaluation Kit Information

The MAX16602CL8 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains all of the components necessary to evaluate the MAX16602 and MAX20790. The MAX16602 is a PMBus™-compatible, multiphase voltage regulator controller for AI cores or Intel^® VR13.HC server CPUs. The IC is packaged in a 56-pin, 7mm x 7mm QFN. The controller generates eight pulse-width modulated (PWM) control signals or phases. The EV kit is an 8-phase multiphase synchronous buck converter that uses 2-phase coupled inductors, which reduce the effective inductor value and size without excessive ripple current, thus reducing the required output capacitance and improving transient response.

The EV kit also demonstrates the full functionality of the MAX20790 smart power-stage IC. The IC has monolithic integration and advanced packaging technology that allow high-switching frequencies with significantly lower losses than conventional implementations. There are eight MAX20790 devices for the main output rail.

Warning: The EV kit is designed to operate with 12V input and high current. Follow safe procedures when working with high-current electrical equipment.

Under severe fault or failure conditions, this EV kit can dissipate large amounts of power, which could result in the mechanical ejection of a component or of component debris at high velocity. Operate this kit with care to avoid possible personal injury.

Applications

AI Cores and XPUs
Communications and Networking Equipment Supply
Enterprise Storage
Graphics Processors
High-Current Multiphase Voltage Regulators
Networking ASICs
Servers and Workstations
VR13.HC CPUs and Memory

Features & Benefits

High Power Density and Efficiency
- Monolithic, Smart Power-Stage Support: MAX20790
- Small Power-Stage Footprint: ~24mm²
- Top-Tier Efficiency (95.6% Peak Efficiency at 1.8V_OUT)
- Integrated Input Power Monitor
Telemetry Through PMBus
- Digitally Programmable Configuration
- Input Voltage, Current, and Power Monitoring
- Power-Stage Temperature Monitoring and Reporting
Advanced Power Management
- Autonomous Phase-Shedding
- Orthogonal Current Rebalance for Phase-Current Balance During Transients
- Low Quiescent Current—Improves Light-Load and Standby Efficiency
- Protection Features
- Controller Input and Bias Supply Undervoltage Protection
- Power-Stage Supply and Boost UVLO Protection
- Power-Stage Boost Refresh
- Power-Stage VX Short and Overtemperature Shutdown
- Fast Overcurrent Protection
Proven PCB Layout
Fully Assembled and Tested

Documentation & Resources

Data Sheets

MAX20790: Smart Power-Stage IC with Integrated Current and Temperature Sensors Data Sheet (Rev. 1)
7/15/2021

PDF

643K

Videos

High Power Density Solutions for AI & Server
11/30/2022
Low-Profile, High Power Density Solutions for Xilinx FPGAs
11/29/2022

Technical Articles

Utilizing the Benefits of Coupled Inductors
8/23/2021

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Evaluation Boards

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.