1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Multiple Output Buck Regulators
  6. MAX17559


Features and Benefits

  • Wide Range of Operation
    • Wide 4.5V to 60V Input Voltage Range
    • Wide 0.8V to 24V Output Voltage Range
    • RSENSE or Inductor DCR Current-Sensing
    • Fixed 180° Out-of-Phase Operation
    • Adjustable 100kHz to 2.2MHz Switching Frequency
    • Independent Enable and PGOOD
    • Available in a Lead(Pb)-Free 7mm × 7mm, 32-Pin TQFP Package
  • Enhances Power Efficiency
    • Low-Impedance Gate Drives for High Efficiency
    • DCM Operation at Light Loads
    • Auxiliary Bootstrap LDO
  • Operates Reliably in Adverse Industrial Environments
    • Independent Adjustable Soft-Start/Stop or Tracking
    • Current Selectable Foldback or Latchoff Limits MOSFET Heat Dissipation During a Short-Circuit Condition
    • Operates Over the -40°C to +125°C Temperature Range
    • Output Overvoltage and Overtemperature Protections

Product Details

The MAX17559 is a dual-output, synchronous step-down controller that drives nMOSFETs. The device uses a constant-frequency, peak-current-mode architecture.

The two outputs can be configured as independent voltage rails. Input capacitor size is minimized by running the two outputs 180° out-of-phase.

The IC supports current sensing using either an external current-sense resistor for accuracy or an inductor DCR for improved system efficiency. Current foldback or latchoff limits MOSFET power dissipation under short-circuit conditions.

The IC provides independent adjustable soft-start/stop for each output and can start up monotonically into a prebiased output. The IC can be configured in either PWM or DCM modes of operation, depending on whether constant-frequency operation or light-load efficiency is desired.

The IC operates over the -40°C to +125°C temperature range and is available in a lead(Pb)-free, 7mm × 7mm, 32-pin TQFP, package.


  • Computerized Numerical Control
  • Distributed DC Power Systems
  • Industrial Power Supplies
  • Motion Control
  • Programmable Logic Controllers

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.





Reference Designs (1)

Product Recommendations

MAX17559 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
MAX17559ACJ+ Material Declaration Reliability Data Thin Quad Flatpack
MAX17559ACJ+T Material Declaration Reliability Data Thin Quad Flatpack
Wafer Fabrication Data MAX17559 Reliability Data

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Sample & Buy

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