ACT  -  系列元器件数据手册
ACT8702  -  Four Channel Integrated Power Management IC for Handheld Portable Equipment  -  Active Semi  -  电源管理

FEATURES
Multiple Patents Pending
Li+ Battery Charger with Integrated MOSFET
- ON/OFF Control and Status Indication
  Three Integrated Regulators
- 350mA Step-Down DC/DC
- 550mA Step-Down DC/DC
- 5V Step-Up DC/DC
  Minimal External Components
  4x4mm, Thin-QFN (TQFN44-24) Package
- Only 0.75mm Height
- RoHS Compliant
APPLICATIONS
Portable Devices and PDAs 
Digital Media Players 
Battery Operated Devices 
GPS Receivers, etc.

GENERAL DESCRIPTION
The patent-pending ACT8702 is a complete, cost effective, highly efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment. This device integrates two PWM step-down DC/DC converters, one PWM step-up DC/DC converter and a full-featured linear-mode Li+ battery charger into a single, thin, space-saving package.
REG1 and REG2 are fixed-frequency, current-mode PWM step-down DC/DC converters that are optimized for high efficiency and are capable of supplying up to 350mA and 550mA, respectively. REG3 is a fixed-frequency, step-up DC/DC co