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ACT8891 fiches techniques PDF

Active-Semi - Advanced PMU

Numéro de référence ACT8891
Description Advanced PMU
Fabricant Active-Semi 
Logo Active-Semi 





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ACT8891 fiche technique
® 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
ActivePMUTM is a trademark of Active-Semi.
I2CTM is a trademark of NXP.
-1-
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
Free Datasheet http://www.datasheet4u.com/

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