基于ACT8937设计的高效7路DC电源技术 - 模拟电源 -

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

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