®
ACT8939
Product Brief, 05-Dec-11
Advanced PMU for Freescale i.MX53 Processor
FEATURES
•
•
•
•
•
•
•
Three Step-Down DC/DC Converters
Four Low-Dropout Linear Regulators
Integrated
ActivePath
TM
Charger
I
2
C
TM
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
Freescale i.MX53 processor. It is ideal for a wide
range of high performance portable handheld
applications such as tablet or pad devices. This device
integrates the
ActivePath
TM
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
ActivePath
TM
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 1150mA of output
current, while the third supports up to 1300mA. All
four low-dropout linear regulators are high-
performance, low-noise regulators that supply up to
320mA of output current.
The ACT8939 is available in a compact, Pb-Free
and RoHS-compliant TQFN55-40 package.
GENERAL DESCRIPTION
The ACT8939 is a complete, cost effective, highly-
efficient
ActivePMU
TM
power management solution,
optimized for the unique power, voltage-
sequencing, and control requirements of the
TYPICAL APPLICATION DIAGRAM
Innovative Power
TM
ActivePMU
and
ActivePath
I
2
C
TM
is a trademark of NXP.
TM
TM
-1-
are trademarks of Active-Semi.
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
