ACT  -  Series DataSheet
ACT8770  -  Six Channel Integrated Power Management IC for Handheld Portable Equipment   -  Active Semi  -  Power Management

GENERAL DESCRIPTION
The patent-pending ACT8770 is a complete, cost-effective, highly efficient ActivePMUTM integrated power management solution that is ideal for a wide range of portable handheld equipment. This device integrates two PWM step-down DC/DC converters, three low dropout linear regulators (LDOs) 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. The three LDOs are high PSRR linear regulators, each capable of supplying up to and 250mA. The battery charger incorporates an internal power MOSFET for constant-current/constant-voltage, thermally regulated charging of a single-cell Li+ battery.
The ACT8770 is available in a tiny 4mm x 4mm 24-pin Thin-QFN package that is just 0.75mm thick.

FEATURES
#Multiple Patents Pending
#Li+ Battery Charger with Integrated MOSFET
- Auto-Select Charge Current (AC or USB)
- ON/OFF Control and Status Indication
#Five Integrated Regulators
- 350mA PWM Step-Down DC/DC
- 550mA PWM Step-Down DC/DC
- 250mA High PSRR LDO
- 250mA High PSRR LDO
- 250mA High PSRR LDO
#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.