MAX8566

PRODUCTION

High-Efficiency, 10A, PWM Internal-Switch Step-Down Regulator

Data Sheet (Rev. 3) Product Selection Table
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Overview

  • Internal 8mΩ On-Resistance MOSFETs
  • 10A Output PWM Step-Down Regulator
  • ±1% Output Accuracy over Load, Line, and Temperature
  • Operates from 2.3V to 3.6V Input Supply
  • Adjustable Output from 0.6V to (0.87 x VIN)
  • 250kHz to 2.4MHz Adjustable Frequency or SYNC Input
  • Allows All-Ceramic-Capacitor Design
  • SYNCOUT Drives 2nd Regulator 180° Out-of-Phase
  • Prebiased or Monotonic Soft-Start
  • Programmable Soft-Start Time
  • Output Tracking or Sequencing
  • Sourcing and Sinking Output Current
  • Power-Good Output
  • 32-Lead TQFN Package
  • REFIN for DDR-Termination Application

The MAX8566 high-efficiency switching regulator delivers up to 10A load current at output voltages from 0.6V to (0.87 x VIN). The IC operates from 2.3V to 3.6V input supplies, making it ideal for point-of-load applications. The total output-voltage set error is less than ±1% over load, line, and temperature.

The MAX8566 operates in pulse-width-modulation (PWM) mode with a 250kHz to 2.4MHz switching frequency range that is programmable by an external resistor. The IC can be synchronized to an external clock in the same frequency range using the SYNC input. The high operating frequency minimizes the size of external components. Using low-RDS(ON) n-channel MOSFETs for both high- and low-side switches maintains high efficiency at both heavy-load and high-switching frequencies.

The MAX8566 employs a voltage-mode control architecture with a high-bandwidth (> 10MHz) error amplifier. The voltage-mode control architecture makes switching frequencies greater than 1MHz possible, achieving all-ceramic-capacitor designs to minimize PC board space. The error amplifier works with Type 3 compensation to fully utilize the bandwidth of the high-frequency switching to obtain fast transient response. Adjustable soft-start time provides flexibility to minimize input startup inrush current. An open-drain, power-good (PWRGD) signal goes high when the output reaches 90% of its regulation point.

The MAX8566 provides a SYNCOUT output to synchronize a second MAX8566 or a second regulator switching 180° out-of-phase with the first to reduce the input ripple current, which consequently reduces the input-capacitance requirements. The MAX8566 also provides an external reference input (REFIN) for output-tracking applications.

The MAX8566 is available in a 32-pin, 5mm x 5mm TQFN package. The MAX8566 and all the required external components fit into a footprint of less than 0.80in².

Applications

  • ASIC/CPU/DSP Core Voltages
  • Base-Station Power Supplies
  • DDR Power Supplies
  • Fiber Power Supplies
  • Network-Power Supplies
  • POL Power Supplies
  • Telecom Power Supplies
MAX8566
High-Efficiency, 10A, PWM Internal-Switch Step-Down Regulator
MAX8566: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 3

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 5
MAX1945
PRODUCTION 1MHz, 1% Accurate, 6A Internal Switch Step-Down Regulators
MAX8505
PRODUCTION 3A, 1MHz, 1% Accurate, Internal Switch Step-Down Regulator with Power-OK
MAX1951
PRODUCTION 1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators
MAX1972
PRODUCTION Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-Down Regulator with POR and RSI/PFO
MAX1974
PRODUCTION Smallest 1A, 1.4MHz Step-Down Regulators
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Tools & Simulations

EE-Sim Power® Tools 1

The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

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SIMPLIS Models 1

Evaluation Kits

MAX8566EVKIT

Evaluation Kit for the MAX8566

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Features and Benefits

  • Internal 8mΩ On-Resistance MOSFETs
  • 10A Output PWM Step-Down Regulator
  • ±1% Output Accuracy Over Load, Line, and Temperature
  • Operates from 2.3V to 3.6V Input Supply
  • Adjustable Output from 0.6V to (0.87 x VIN)
  • 250kHz to 2.4MHz Adjustable Frequency or SYNC Input
  • Allows All Ceramic Capacitor Design
  • SYNCOUT Drives 2nd Regulator 180° Out-of-Phase
  • Prebiased or Monotonic Soft-Start
  • Programmable Soft-Start Time
  • Output Tracking or Sequencing
  • 32-Lead, 5mm x 5mm Thin QFN Package
  • REFIN for DDR Termination Applications
  • Surface-Mount Components
  • Assembled and Tested

Product Details

The MAX8566 evaluation kit (EV kit) demonstrates the MAX8566 integrated 10A step-down converter. The EV kit generates a 1.8V output voltage at load currents up to 10A from a 2.3V to 3.6V input voltage range. The MAX8566 switches at 1MHz and provides over 95% efficiency with the supplied components. The MAX8566 EV kit comes fully assembled and tested.

Applications

  • ASIC/CPU/DSP Core Voltages
  • Base-Station Power Supplies
  • DDR Power Supplies
  • Fiber Power Supplies
  • Network-Power Supplies
  • POL Power Supplies
  • Telecom Power Supplies
MAX8566EVKIT
Evaluation Kit for the MAX8566

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