1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. MAX8566


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
  • Sourcing and Sinking Output Current
  • Power-Good Output
  • 32-Lead TQFN Package
  • REFIN for DDR-Termination Application

Product Details

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.


  • ASIC/CPU/DSP Core Voltages
  • Base-Station Power Supplies
  • DDR Power Supplies
  • Fiber Power Supplies
  • Network-Power Supplies
  • POL Power Supplies
  • Telecom Power Supplies

Product Lifecycle icon-recommended 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 (1)

Tools & Simulations

EE-Sim® Power Tools

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.



MAX8566 SIMPLIS Schematic

MAX8566 SIMPLIS Schematic

Product Recommendations

MAX8566 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX8566ETJ+ Material Declaration Reliability Data 32-LFCSP-5X5X0.75
MAX8566ETJ+T Material Declaration Reliability Data 32-LFCSP-5X5X0.75
Wafer Fabrication Data MAX8566 Reliability Data

Sample & Buy

Ordering FAQs

See our Ordering FAQs for answers to questions about online orders, payment options and more.


Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.


List Pricing

(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Lead Times

Please see the latest communication from our CCO regarding lead times.



A Sample link will be shown above, next to the part, only for parts that are included in our sample program. Selecting the Sample button will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Price Table Help