ACT8939 [ACTIVE-SEMI]
Advanced PMU for Freescale i.MX53 Processor; 先进的PMU飞思卡尔的i.MX53处理器
| 型号： | ACT8939 |
| 厂家： | 
ACTIVE-SEMI, INC |
| 描述： | Advanced PMU for Freescale i.MX53 Processor |
| 文件： | 总2页 (文件大小：91K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
ACT8939
Product Brief, 05-Dec-11
Advanced PMU for Freescale i.MX53 Processor
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 ActivePathTM complete battery charging
and management system with seven power supply
channels.
FEATURES
• 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
− Pb-Free and RoHS Compliant
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
320mA of output current.
GENERAL DESCRIPTION
The ACT8939 is a complete, cost effective, highly-
efficient ActivePMUTM power management solution,
optimized for the unique power, voltage-
sequencing, and control requirements of the
The ACT8939 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 © 2011 Active-Semi, Inc.
®
ACT8939
Product Brief, 05-Dec-11
PRODUCT OPTIONS
Block
REG1
REG2
REG3
REG4
REG5
REG6
REG7
Function
Output Voltage
0.6V to 3.9V
0.6V to 3.9V
0.6V to 3.9V
0.6V to 3.9V
0.6V to 3.9V
0.6V to 3.9V
0.6V to 3.9V
Capability
1150mA
1150mA
1300mA
320mA
Step-Down DC/DC
Step-Down DC/DC
Step-Down DC/DC
LDO
LDO
LDO
LDO
320mA
320mA
320mA
FUNCTIONAL BLOCK DIAGRAM
(Optional)
BODY
SWITCH
CHGIN
ACIN
AC Adaptor
USB
ACT8939
System Supply
4.35V to 6V
VSYS
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
OUT7
110°C
SW1
OUT1
GP12
OUT1
nRSTO
VSYS
nPBIN
PUSH BUTTON
VP2
To VSYS
OUT7
SW2
OUT2
GP12
nPBSTAT
OUT2
OUT7
nIRQ
VP3
To VSYS
SW3
OUT3
GP3
PWRHLD
OUT3
System
Control
PWREN
VSEL
SCL
INL
To VSYS
OUT4
OUT4
REG4
LDO
SDA
BAT
OUT5
OUT6
OUT7
LBI
REG5
LDO
-
OUT5
OUT6
1.2V
VSYS
+
nLBO
REG6
LDO
REG7
LDO
OUT7
REFBP
Reference
GA
EP
Innovative PowerTM
- 2 -
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
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