ACT  -  系列元器件数据手册
ACT8750  -  Six Channel Integrated Power Management IC for Handheld Portable Equipment   -  Active Semi  -  电源管理

GENERAL DESCRIPTION
The patent-pending ACT8750 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 step-up DC/DC converter with over-voltage protection (OVP) for WLED bias, and three low dropout linear regulators (LDOs) 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 safely and efficiently biases a string of up to seven white-LEDs for backlighting applications. The three LDOs are high PSRR linear regulators capable of supplying up to 150mA each.
The ACT8750 is available in a tiny 4mm x 4mm 24-pin Thin-QFN package that is just 0.75mm thick.

FEATURES
#Multiple Patents Pending
#Six Integrated Regulators
- 350mA PWM Step-Down DC/DC
- 550mA PWM Step-Down DC/DC
- Step-Up DC/DC with OVP for WLED Bias
- 150mA High PSRR LDO
- 150mA High PSRR LDO
- 150mA High PSRR LDO
#Minimal External Components
#4x4mm, Thin-QFN (TQFN44-24) Package
- Only 0.75mm Height
- RoHS Compliant
APPLICATIONS
#Portable Devices and PDAs
#Wireless Handhelds
#DMB Enabled Devices
#GPS Receivers, etc.