ACT8938 [ACTIVE-SEMI]
Advanced PMU for Marvell Aspen; 先进的PMU为Marvell的阿斯
| 型号： | ACT8938 |
| 厂家： | 
ACTIVE-SEMI, INC |
| 描述： | Advanced PMU for Marvell Aspen |
| 文件： | 总2页 (文件大小：87K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
ACT8938
Product Brief, 09-Nov-10
Advanced PMU for Marvell Aspen
FEATURES
GENERAL DESCRIPTION
The ACT8938 is a complete, cost effective, highly
efficient ActivePMUTM power management solution,
optimized for the unique power, voltage
sequencing, and control requirements of the Marvell
Aspen processor.
• Optimized for Marvell Aspen Processors
• Three Step-Down DC/DC Converters
• Four Low-Dropout Linear Regulators
• Integrated ActivePathTM Charger
• I2CTM Serial Interface
• Advanced Enable/Disable Sequencing Controller
• Minimal External Components
• Tiny 5×5mm TQFN55-40 Package
− 0.75mm Package Height
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 ActivePathTM
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
150mA, 150mA, 320mA and 320mA respectively.
− Pb-Free and RoHS Compliant
APPLICATIONS
• Personal Navigation Devices
• Portable Media Players
• Tablet Devices
• Smart Phones
• MIDs
The ACT8938 is available in a compact, Pb-Free
and RoHS-compliant TQFN55-40 package .
TYPICAL APPLICATION DIAGRAM
Innovative PowerTM
- 1 -
www.active-semi.com
ActivePMUTM and ActivePathTM are trademarks of Active-Semi.
I2CTM is a trademark of NXP.
Copyright © 2010 Active-Semi, Inc.
ACT8938
Active- Semi
Product Brief, 09-Nov-10
PRODUCT OPTIONS
Block
ActivePath
CHGR
REG1
Function
Output Voltage
Capability
Up to 2A
System Power Selection
Battery Charger
Step-Down DC/DC
Step-Down DC/DC
Step-Down DC/DC
LDO
4.6V
4.2V
Programmable up to 1A
1150mA
Adjustable, or 0.6V to 3.9V
0.6V to 3.9V
REG2
1150mA
REG3
1300mA
REG4
150mA
REG5
LDO
150mA
REG6
LDO
320mA
REG7
LDO
320mA
FUNCTIONAL BLOCK DIAGRAM
(Optional)
BODY
SWITCH
CHGIN
AC Adaptor
USB
4.35V to 6V
ACT8938
System Supply
VSYS
ACIN
BODY
SWITCH
ActivePath
Control
Li+ Battery
BAT
VSYS
+
nSTAT
102µA
CURRENT SENSE
CHARGE STATUS
TH
VOLTAGE SENSE
PRE-
CONDITION
CHGLEV
ISET
Charge
Control
2.85V
VP1
To VSYS
THERMAL
REGULATION
OUT2
110°C
SW1
OUT1
nRSTO
OUT1
VSYS
GP12
nPBIN
PUSH BUTTON
VP2
To VSYS
OUT2
SW2
nPBSTAT
OUT2
OUT2
OUT2
GP12
nIRQ
VP3
To VSYS
SW3
PWRHLD
OUT3
OUT3
System
Control
PWREN
VSEL
SCL
GP3
INL
To VSYS
OUT4
OUT4
REG4
LDO
SDA
BAT
OUT5
OUT5
LBI
REG5
LDO
-
1.2V
VSYS
+
OUT6
OUT6
nLBO
REG6
LDO
OUT7
OUT7
REG7
LDO
REFBP
Reference
GA
EP
Innovative PowerTM
- 2 -
www.active-semi.com
Copyright © 2010 Active-Semi, Inc.
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