基于ACT8937設(shè)計的高效7路DC電源技術(shù)
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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
圖1。ACT8937功能方框圖
圖2。ACT8937典型應(yīng)用框圖
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