原标题：Active-Semi ACT8937高效7路DC电源转换方案

　　The ACT8937 is a complete, cost effective, highlyefficient ActivePMUTM power management solution, optimized for the unique power, voltagesequencing, and control requirements of the Samsung S5PC100, S5PC110 and S5PV210 processors.

　　This device features three step-down DC/DC converters and four low-noise, low-dropout Linear regulators, along with a complete battery charging solution featuring the advanced ActivePathTM system-power selection function.

　　The three DC/DC converters utilize a highefficiency, fixed-frequency (2MHz), current-mode PWM control architecture that requires a minimum number of external components. Two DC/DCs are capable of supplying up to 900mA of output current, while the third supports up to 700mA. All four lowdropout linear regulators are high-performance, low-noise, regulators that supply up to 150mA, 150mA, 250mA, and 250mA, respectively.

　　The ACT8937 is available in a compact, Pb-Free and RoHS-compliant TQFN55-40 package.

　　ACT8937主要特性：

　　• Optimized for Samsung S5PC100, S5PC110 and S5PV210 Processors

　　• Three Step-Down DC/DC Converters

　　• Four Low-Dropout Linear Regulators

　　• Integrated ActivePathTM Charger

　　• I2CTM Serial Interface

　　• Advanced Enable/Disable Sequencing Controller

　　• Minimal External Components

　　• Tiny 5×5mm TQFN55-40 Package

　　− 0.75mm Package Height

　　− Pb-Free and RoHS Compliant

　　图1。ACT8937功能方框图

　　图2。ACT8937典型应用框图