ACT8780 查看數據表（PDF） - Active-Semi, Inc
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ACT8780 Datasheet PDF : 2 Pages
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ACT8780
Product Brief, 03-Feb-08
Advanced Information―All Information Subject to Change
Six Channel Integrated Power Management IC
for Handheld Portable Equipment
FEATURES
• Multiple Patents Pending
• Six Integrated Regulators
− 350mA PWM Step-Down DC/DC
− 550mA PWM Step-Down DC/DC
− 550mA PWM Step-Down DC/DC
− 250mA Low Noise LDO
− 250mA Low Noise LDO
− 250mA Low Noise LDO
• I2CTM Compatible Serial Interface
− Programmable Output Voltages
− Configurable Operating Modes
• Minimal External Components
• 4x4mm, Thin-QFN (TQFN44-24) Package
− Only 0.75mm Height
− RoHS Compliant
APPLICATIONS
• Portable Devices and PDAs
• Wireless Handhelds
• DMB Enabled Devices
• GPS Receivers, etc.
GENERAL DESCRIPTION
The patent-pending ACT8780 is a complete, cost-
effective, highly-efficient ActivePMUTM power man-
agement solution that is ideal for a wide range of
portable handheld equipment. This device inte-
grates three step-down DC/DC converters and
three low dropout linear regulators (LDOs) into a
single, thin, space-saving package. An I2C Serial
Interface provides programmability for the DC/DC
converters and LDOs.
The ACT8780 also integrates two enable pins: ON1
controls REG1, REG2 and REG3, ON4 controls
REG4, REG5 and REG6.
REG1, REG2 and REG3 are fixed-frequency, cur-
rent-mode PWM step-down DC/DC converters that
are optimized for high efficiency and are capable of
supplying up to 350mA, 550mA and 550mA, re-
spectively. REG4, REG5 and REG6 are low noise,
high PSRR linear regulators that are capable of
supplying up to 250mA each.
The ACT8780 is available in a tiny 4mm x 4mm
24-pin Thin-QFN package that is just 0.75mm thin.
SYSTEM BLOCK DIAGRAM
Battery
nMSTR
nIRQ
nRSTO
ON1
ON4
SCL
SDA
OUT1
1.1V to 4.4V
Up to 350mA
System
Control
REG1
Step-Down
DC/DC
ACT8780
ActivePMU TM
REG2
Step-Down
DC/DC
REG3
Step-Down
DC/DC
REG4
LDO
REG5
LDO
REG6
LDO
OUT2
1.1V to 4.4V
Up to 550mA
OUT3
1.1V to 4.4V
Up to 550mA
OUT4
1.4V to 3.7V
Up to 250mA
OUT5
1.4V to 3.7V
Up to 250mA
OUT6
1.4V to 3.7V
Up to 250mA
Innovative Products. Active Solutions.
-1-
ActivePMUTM is a trademark of Active-Semi.
I2CTM is a trademark of Philips Electronics.
www.active-semi.com
Copyright © 2008 Active-Semi, Inc.
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