ACTIVE-SEMI ACT8891

ACT8891
®
Product Brief, 05-Dec-11
Advanced PMU for Rockchip RK2918 Processor
FEATURES
GENERAL DESCRIPTION
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The ACT8891 is a complete, cost effective, highlyefficient ActivePMUTM power management solution,
optimized for the unique power, voltagesequencing, and control requirements of the
Rockchip RK2918 processor.
Optimized for Rockchip RK2918 Processor
Three Step-Down DC/DC Converters
Four Low-Dropout Linear Regulators
I2CTM Serial Interface
This device features three step-down DC/DC
converters and four low-noise, low-dropout linear
regulators.
Advanced Enable/Disable Sequencing Controller
Minimal External Components
Tiny 4×4mm TQFN44-32 Package
− 0.75mm Package Height
− Pb-Free and RoHS Compliant
The three DC/DC converters utilize a highefficiency, 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 highperformance, 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.
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www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
ACT8891
®
Product Brief, 05-Dec-11
PRODUCT OPTIONS
Block
Function
Output Voltage
Capability
REG1
Step-Down DC/DC
0.6V to 3.9V
1150mA
REG2
Step-Down DC/DC
0.6V to 3.9V
1150mA
REG3
Step-Down DC/DC
0.6V to 3.9V
1300mA
REG4
LDO
0.6V to 3.9V
320mA
REG5
LDO
0.6V to 3.9V
320mA
REG6
LDO
0.6V to 3.9V
320mA
REG7
LDO
0.6V to 3.9V
320mA
FUNCTIONAL BLOCK DIAGRAM
Active-Semi
VP1
To Battery
ACT8891
SW1
OUT1
VDDREF
OUT1
nPBIN
PUSH BUTTON
GP1
OUT1
VP2
nRSTO
To Battery
SW2
OUT2
OUT2
OUT1
GP2
nPBSTAT
VP3
OUT1
To Battery
SW3
nIRQ
OUT3
OUT3
System
Control
GP3
PWRHLD
INL45
VSEL
REG4
LDO
SCL
SDA
Serial
Interface
REG5
LDO
VDDREF
To Battery
OUT4
OUT4
OUT5
OUT5
To Battery
INL67
REFBP
To Battery
Reference
REG6
LDO
GA
REG7
LDO
EP
Innovative PowerTM
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OUT6
OUT6
OUT7
OUT7
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.