ACT8891(2011) Ver la hoja de datos (PDF) - Active-Semi, Inc

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ACT8891
(Rev.:2011)

Advanced PMU for Rockchip RK2918 Processor

Active-Semi, Inc 

®

ACT8891

Product Brief, 05-Dec-11

Advanced PMU for Rockchip RK2918 Processor

FEATURES

• Optimized for Rockchip RK2918 Processor

• Three Step-Down DC/DC Converters

• Four Low-Dropout Linear Regulators

• I2CTM Serial Interface

• Advanced Enable/Disable Sequencing Controller

• Minimal External Components

• Tiny 4×4mm TQFN44-32 Package

− 0.75mm Package Height

− Pb-Free and RoHS Compliant

GENERAL DESCRIPTION

The ACT8891 is a complete, cost effective, highly-

efficient ActivePMUTM power management solution,

optimized for the unique power, voltage-

sequencing, and control requirements of the

Rockchip RK2918 processor.

This device features three step-down DC/DC

converters and four low-noise, low-dropout linear

regulators.

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 1150mA of output

current, while the third supports up to 1300mA. All

four low-dropout linear regulators are high-

performance, low-noise, regulators that support up

to 320mA.

The ACT8891 is available in a compact, Pb-Free

and RoHS-compliant TQFN44-32 package.

SYSTEM BLOCK DIAGRAM

Innovative PowerTM

-1-

ActivePMUTM is a trademark of Active-Semi.

I2CTM is a trademark of NXP.

www.active-semi.com

Copyright © 2011 Active-Semi, Inc.

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