Features and Benefits

  • 1A Output Current for MAX1742
    2.5A Output Current for MAX1842
  • Up to 1MHz Switching Frequency
  • Up to 95% Efficiency
  • Synchronous Rectification for Improved Efficiency
  • No External Schottky Diode Required
  • Output Voltage
    • +1.1V, +1.5V, +1.8V, or +2.5V Selectable
    • +1.1V to VIN Adjustable
  • +3V to +5.5V Input Voltage Range
  • < 1µA (typ) IC Shutdown Current
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Details

The MAX1742 and MAX1842 evaluation kits (EV kits) provide a +1.8V adjustable output voltage from a +3V to +5.5V input source. The MAX1742 delivers up to 1A of output current, and the MAX1842 delivers up to 2.5A of output current.

The MAX1742/MAX1842 are step-down switching regulators with internal synchronous-rectifiers that operate up to 1MHz, which minimizes external components. The devices feature resistor-programmable, fixed off-time current-mode operation for superior load- and line-transient response, and achieve efficiencies up to 95%.

The MAX1742/MAX1842 EV kits can also be used to evaluate other output voltages by adding feedback resistors R1 and R2 or by using the jumper-selectable +1.1V, +1.5V, +1.8V, or +2.5V settings.


  • 5V or 3.3V to Low-Voltage Conversion
  • Chipset Supplies
  • CPU I/O Ring
  • Notebook and Subnotebook Computers

Applicable Parts