®
ACT8899
Product Brief, 05-Dec-11
Advanced PMU for Freescale i.MX53 Processor
FEATURES
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Optimized for Freescale i.MX53 Processor
Three Step-Down DC/DC Converters
Four Low-Dropout Linear Regulators
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2
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TM
Serial Interface
Advanced Enable/Disable Sequencing Controller
Minimal External Components
Tiny 4×4mm TQFN44-32 Package
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0.75mm Package Height
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Pb-Free and RoHS Compliant
GENERAL DESCRIPTION
The ACT8899 is a complete, cost effective, highly-
efficient
ActivePMU
TM
power management solution,
optimized for the unique power, voltage-
sequencing, and control requirements of the
Freescale i.MX53 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 ACT8899 is available in a compact, Pb-Free
and RoHS-compliant TQFN44-32 package.
SYSTEM BLOCK DIAGRAM
Innovative Power
TM
ActivePMU
is a trademark of Active-Semi.
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2
C
TM
is a trademark of NXP.
TM
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www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
