GENERAL DESCRIPTION
The ADP2102 is a synchronous step-down dc-to-dc converter that converts a 2.7 V to 5.5 V unregulated input voltage to a lower regulated output voltage with up to 95% efficiency and 1% accuracy. The low duty cycle capability of the ADP2102 is ideal for USB applications or 5 V systems that power up submicron subvolt processor cores. Its 3 MHz typical operating frequency and excellent transient response allow the use of small, low cost 1 μH inductors and 2.2 μF ceramic capacitors.

FEATURES
   Input voltage range: 2.7 V to 5.5 V
   600 mA maximum load current
   95% efficiency
   Low duty cycle operation
   Only 3 tiny external ceramic components
   3 MHz typical operating frequency
   Fixed output voltage from 0.8 V to 1.875 V
   Adjustable output voltage up to 3.3 V
   0.01 μA shutdown supply current
   Automatic power save mode
   Internal synchronous rectifier
   Internal soft start
   Internal compensation
   Enable/shutdown logic input
   Undervoltage lockout
   Current limit protection
   Thermal shutdown
   Small 8-lead, 3 mm × 3 mm LFCSP package
  
APPLICATIONS
   USB powered devices
   WLAN and gateways
   Point of loads
   Processor core power from 5 V
   Digital cameras
   PDAs and palmtop computers
   Portable media players, GPS