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