GENERAL DESCRIPTION
The ADP2108 is a high efficiency, low quiescent current stepdown dc-to-dc converter manufactured in two different packages. The total solution requires only three tiny external components. It uses a proprietary, high speed current mode, constant frequency PWM control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2108 has a power save mode that reduces the switching frequency under light load conditions.

FEATURES
   Peak efficiency: 95%
   3 MHz fixed frequency operation
   Typical quiescent current: 18 μA
   Maximum load current: 600 mA
   Input voltage: 2.3 V to 5.5 V
   Uses tiny multilayer inductors and capacitors
   Current mode architecture for fast load and line
      transient response
   100% duty cycle low dropout mode
   Internal synchronous rectifier
   Internal compensation
   Internal soft start
   Current overload protection
   Thermal shutdown protection
   Shutdown supply current: 0.2 μA
   Available in
      5-ball WLCSP
      5-lead TSOT
   Supported by ADIsimPower™ design tool
  
APPLICATIONS
   PDAs and palmtop computers
   Wireless handsets
   Digital audio, portable media players
   Digital cameras, GPS navigation units