ACT  -  系列元器件数据手册
ACT8345  -  Three-Channel Integrated Power Management IC for Handheld Portable Equipment   -  Active Semi  -  电源管理

GENERAL DESCRIPTION
The patent-pending ACT8345 is a complete, cost-efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment. This device integrates a PWM step-down DC/DC converter and two low-noise, low-dropout linear regulators (LDOs) into a single, thin, space-saving package. This device is ideal for a wide range of portable handheld equipment that can benefit from the advantages of ActivePMUTM technology but does not require a high level of integration.

REG1 is a fixed-frequency, current-mode PWM step-down DC/DC converter that is optimized for high efficiency and is capable of supplying up to 550mA. REG1's output is available in a variety of factory-preset output voltage, and an adjustable output voltage mode is also available. REG2 and REG3 are low noise LDOs that are available in a variety of fixed output voltage options and are each capable of supplying up to 360mA.

The ACT8345 is available in a tiny 3mm x 3mm 10-pin Thin-DFN package that is just 0.75mm thin.

FEATURES

Multiple Patents Pending
Three Integrated Regulators

- 550mA PWM Step-Down DC/DC
- 360mA Low Noise LDO
- 360mA Low Noise LDO

Independent Enable/Disable Control
Minimal External Components
3x3mm, Thin-DFN (TDFN33-10) Package
 

- Only 0.75mm Package Height
 
- RoHS Compliant Package
APPLICATIONS

Portable Devices and PDAs
MP3