DESCRIPTION
   The CAT3637 is a high efficiency Quad-Mode fractional charge pump that can drive up to six LEDs programmable by a 1-wire digital interface. The inclusion of a 1.33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.5x charge pumps with no added external capacitors.

FEATURES
◾ High efficiency 1.33x charge pump
◾ Quad-Mode charge pump: 1x, 1.33x, 1.5x, 2x
◾ Drives 6 LEDs between 30mA and 0mA each
◾ 1-wire EZDimTM interface with 2mA step
◾ Power efficiency up to 92%
◾ Low noise input ripple in all modes
◾ “Zero” current shutdown mode
◾ Soft start and current limiting
◾ Short circuit protection
◾ Thermal shutdown protection
◾ Tiny 3mm x 3mm, 16-pad TQFN package

APPLICATIONS
◾ LCD Display Backlight
◾ Cellular Phones
◾ Digital Still Cameras
◾ Handheld Devices