Features and Benefits

  • High Feature Set in Ultra-Small Footprint
    • High-Efficiency DC-DC Converter
    • Up to 12A Output Current
    • 2.5V to 5.5V Operating Supply Voltage
    • Optional Factory-Preset Output Voltage
    • 2.1MHz/4.2MHz Options
    • Enable Input
    • RESET Output
    • Spread-Spectrum Option
    • Adaptive On-Time
    • 3mm x 3.5mm FCQFN
  • High Precision
    • 107%/93% OV/UV Monitor
    • ±2% OV/UV Accuracy
    • ±1% Output Voltage Accuracy
    • Excellent Load Transient Performance
    • Differential Remote Sense
    • PWM and SKIP Mode Operation
    • MAXQ Power Architecture
  • Ultra-High Efficiency
    • Up to 93% Efficiency 5V to 1V
  • -40°C to +125°C Operating Temperature Range
  • AEC-Q100 Qualified

Product Details

The MAX20438 is an ultra-high-efficiency switching regulator that delivers up to 12A load current from 0.5V to 1.2V. The IC operates from 2.5V to 5.5V, making it ideal for on-board, point-of-load (PoL) and post regulation applications. The total output error is less than ±1.0% over load, line, and temperature.

The MAX20438 features adaptive on-time with a switching frequency of 2.1MHz or 4.2MHz. High-frequency operation allows for small-size, all-ceramic capacitor design.

The low-resistance, on-chip switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout a much simpler task with respect to discrete solutions.

The device features the MAXQ power architecture which provides precision transient performance and phase margin. This allows obtaining the maximum power, performance, and precision from the converter over a very wide range of configurations.

The output voltage is preset at the factory to allow customers to achieve ±1% output-voltage accuracy without using expensive 0.1% resistors. The device offers factory-programmable soft-start and RESET times.

The device includes overtemperature shutdown and overcurrent limiting. The MAX20438 is designed to operate in the -40°C to +125°C ambient temperature range.


  • Secondary Regulator for SoC/MCU Supply
  • PoL and Post-Regulation Applications
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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.

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