高效7路DCDC转换器ACT8937特性及应用电路图
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.
The ACT8937 is available in a compact, Pb-Free and RoHS-compliant TQFN55-40 package.
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.
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