ACT8931A
Rev 3, 29-Nov-12
Advanced PMU for Rockchip RK2928/RK2926 Processors
Rockchip RK2928/RK2926 processors. It is ideal for a
wide range of high performance portable handheld
applications such as tablet or pad devices. This device
FEATURES
• 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
integrates the ActivePathTM complete battery charging
and management system with seven power supply
channels.
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 high-
efficiency, 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 1100mA of output
current, while the third supports up to 1200mA. All
four low-dropout linear regulators are high-
performance, low-noise regulators that supply up to
320mA of output current.
GENERAL DESCRIPTION
The ACT8931A is a complete, cost effective, highly-
efficient ActivePMUTM power management solution,
optimized for the unique power, voltage-
sequencing, and control requirements of the
The ACT8931A is available in a compact, Pb-Free
and RoHS-compliant TQFN55-40 package.
TYPICAL APPLICATION DIAGRAM
Innovative PowerTM
www.active-semi.com
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ActivePMUTM and ActivePathTM are trademarks of Active-Semi.
I2CTM is a trademark of NXP.
Copyright © 2012 Active-Semi, Inc.