MAX8566

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


Description

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.
MAX8566: Typical Operating Circuit MAX8566: Typical Operating Circuit Enlarge+

Key Features

  • 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

Applications/Uses

  • ASIC/CPU/DSP Core Voltages
  • Base-Station Power Supplies
  • DDR Power Supplies
  • Fiber Power Supplies
  • Network-Power Supplies
  • POL Power Supplies
  • Telecom Power Supplies
Part Number VIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. Method IOUT1
(A)
Switch Type Synchronous Switching Power Good Signal DC-DC Outputs Oper. Freq.
(kHz)
Design Tools Package/Pins Budgetary
Price
min max min max max See Notes
MAX8566  2.3 3.6 0.6 3.1 Resistor 10 Internal Yes Yes 1 2400 EE-Sim
TQFN/32
$5.88 @1k
See All Step-Down Switching Regulators (321)
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.


MAX8566EVKIT: Evaluation Kit for the MAX8566

Technical Documents

Tutorial 5133 Power-Supply Solutions for Altera FPGAs
Tutorial 5132 Power-Supply Solutions for Xilinx FPGAs
Tutorial 660 Regulator Topologies for Battery-Powered Systems

Quality and Environmental Data

Product Reliability Reports: MAX8566.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

Design & Simulate MAX8566

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