ACT  -  Series DataSheet
ACT8701  -  Channel Integrated Power Management IC for Handheld Portable Equipment  -  Active Semi  -  Power Management

FEATURES
• Multiple Patents Pending
• Li+ Battery Charger with Integrated MOSFET
− ON/OFF Control and Status Indication
• Three Integrated Regulators
− 350mA PWM Step-Down DC/DC
− 550mA PWM Step-Down DC/DC
− Step-Up DC/DC with OVP
• 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 ACT8701 is a complete, costeffective, highly-efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment. This device integrates two step-down DC/DC converters, one stepup DC/DC converter with over-voltage protection (OVP), 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 converter that can be configured to generate a 3.3V buck/boost output or can be used in a wide variety of regulatedvoltage applications such as TFT panel biasing.
The battery charger incorporates an internal power MOSFET for constant-current/constant-voltage thermally regulated charging of a single-cell Li+ battery.
The ACT8701 is available in a tiny 4mm x 4mm 24-pin Thin-QFN package that is just 0.75mm thin.