GENERAL DESCRIPTION
The ADP5020 provides a highly integrated power solution that includes all of the power circuits necessary for a digital imaging module. It comprises two step-down dc-to-dc converters, one LDO, and a power sequence controller. All dc-to-dc converters integrate power pMOSFETs and nMOSFETs, making the system simpler and more compact and reducing the cost. The ADP5020 has digitally programmed output voltages and buck converters that can source up to 600 mA. A fixed frequency operation of 3 MHz enables the use of tiny inductors and capacitors. The buck converters use a voltage mode, constant-frequency PWM control scheme, and the synchronous rectification is implemented to reduce the power loss. The Buck 1 regulator operates at up to 93% efficiency.

FEATURES
   Input voltage range: 2.4 V to 5.5 V
   Low standby current: 1 µA
   Switching frequency: 3 MHz
   I2C interface
   Synchronous Buck 1 regulator: 600 mA
   Synchronous Buck 2 regulator: 250 mA
   Low dropout regulator (LDO): 150 mA
   Internal compensation
   Internal soft start
   Thermal shutdown
   20-lead 4 mm × 4 mm LFCSP

APPLICATIONS
   Digital cameras, handsets
   Mobile TVs