Features and Benefits

  • Input Voltage Down to +0.8V
  • 3x3 White LED Array
  • Potentiometer-Adjustable Output Current Level (LED Brightness Control)
  • External Low-Loss N-Channel Switch
  • 10nA IC Shutdown Current
  • Operation Up to 500kHz Switching Frequency
  • Surface-Mount Components
  • Fully Assembled and Tested

Product Details

The MAX1698 evaluation kit (EV kit) is a fully assembled and tested circuit board that contains a boost switching-regulator current source and array of white LEDs. As configured, the circuit is set up to drive 3 banks of 3 series LED arrays at 20mA each; however, a wide variety of other configurations are possible. The IC can be powered from a separate +2.7VDC to +5.5VDC input, while LED power has a wider input range and can be supplied either from a logic supply or battery source.

The MAX1698 features digital soft-start and adjustable lossless LED current control. The MAX1698 EV kit demonstrates low quiescent current, open-circuit protection, and up to 90% efficiency for maximum battery life. Operation up to 500kHz allows the use of tiny surface-mount components.


  • Backlight for LCD Panels
  • Battery-Powered Backlight Applications
  • Cell Phones
  • Handy Terminals
  • PDAs

Documentation & Resources