1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. MAX17531


Features and Benefits

  • Reduces External Components and Total Cost
    • No Schottky–Synchronous
    • Internal Compensation for Any Output Voltage
    • Built-In Soft-Start
    • All-Ceramic Capacitors, Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4V to 42V Input
    • Adjustable 0.8V up to 0.9 x VIN Output
    • 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
  • Reduces Power Dissipation
    • 22µA Quiescent Current
    • Peak Efficiency > 90%
    • PFM Enables Enhanced Light-Load Efficiency
    • 1.2µA Shutdown Current
  • Operates Reliably in Adverse Environments
    • Peak Current Limit Protection
    • Built-In Output Voltage Monitoring Active-Low RESET
    • Programmable EN/UVLO Threshold
    • Monotonic Startup in to Prebiased Load
    • Overtemperature Protection
    • High Industrial -40℃ to +125℃ Ambient Operating Temperature Range / -40℃ to +150℃ Junction Temperature Range

Product Details

The MAX17531 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4V to 42V input. The converter can deliver up to 50mA and generates output voltages from 0.8V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.75% over -40°C to +125°C.

The MAX17531 uses peak-current-mode control and can be operated in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) modes.

The device is available in a 10-pin (3mm x 2mm) TDFN and 10-pin (3mm x 3mm) µMAX® packages. Simulation models are available.


  • Battery-Powered Equipment
  • High-Voltage LDO Replacement
  • HVAC and Building Control
  • Industrial Sensors and Process Control

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 (2)

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.



MAX17531 SIMPLIS Schematic

MAX17531 SIMPLIS Schematic

Product Recommendations

MAX17531 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
MAX17531ATB+ Material Declaration Reliability Data Thin Dual Flatpack No Leads
MAX17531ATB+T Material Declaration Reliability Data Thin Dual Flatpack No Leads
MAX17531AUB+ Material Declaration Reliability Data Micro-MAX, Thin Shrink Small-Outline
MAX17531AUB+T Material Declaration Reliability Data Micro-MAX, Thin Shrink Small-Outline
Wafer Fabrication Data

PCN-PDN Information

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Sample & Buy

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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.



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