Active-Semi
FEATURES
•
ActivePath
TM
Li+ Charger with System Power
Selection
•
Six Integrated Regulators
−
1.3A High Efficiency Step-Down DC/DC
−
1.0A High Efficiency Step-Down DC/DC
−
0.55A High Efficiency Step-Down DC/DC
−
2×360mA Low Noise, High PSRR LDOs
−
30mA RTC LDO / Backup Battery Charger
•
I
2
C
TM
Serial Interface
•
Minimal External Components
ACT8810
Rev 8, 08-Oct-10
Eight Channel
ActivePath
TM
Power Management IC
GENERAL DESCRIPTION
The patent-pending ACT8810 is a complete, cost
effective, highly-efficient
ActivePMU
TM
power
management solution that is ideal for a wide range of
high performance portable handheld applications such
as personal navigation devices (PNDs). This device
integrates the
ActivePath
TM
complete battery charging
and management system with six power supply
channels.
The
ActivePath
architecture automatically selects the
best available input supply for the system. If the
external input source is not present or the system load
current is more than the input source can provide, the
ActivePath
supplies additional current from the battery
to the system. The charger is a complete, thermally-
regulated, stand-alone single-cell linear Li+ charger
that incorporates an internal power MOSFET.
REG1, REG2, and REG3 are three independent,
fixed-frequency, current-mode step-down DC/DC
converters that output 1.3A, 1.0A, and 0.55A,
respectively. REG4 and REG5 are high performance,
low-noise, low-dropout linear regulators that output
up to 360mA each. REG6 is a RTC LDO that
outputs up to 30mA for a real time clock. Finally, an
I
2
C serial interface provides programmability for the
DC/DC converters and LDOs.
The ACT8810 is available in a tiny 5mm x 5mm 40-
pin Thin-QFN package that is just 0.75mm thin.
•
Compatible with USB or AC-Adapter
Charging
•
5mm × 5mm, Thin-QFN (TQFN55-40) Package
−
Only 0.75mm Height
−
RoHS Compliant
APPLICATIONS
•
Personal Navigation Devices
•
Portable Media Players
•
Smart Phones
SYSTEM BLOCK DIAGRAM
CHG_IN
CHGLEV
DCCC
ISET
ACIN
nSTAT0
nSTAT1
TH
BTR
nPBIN
nIRQ
nRSTO
SCL
SDA
ON1
ON2
ON3
VSEL
Battery
Programmable
Up to 1A
VSYS
REG1
Step-Down
DC/DC
REG2
Step-Down
DC/DC
REG3
Step-Down
DC/DC
System
Control
REG4
LDO
REG5
LDO
OUT1
Adjustable, or
0.8V to 4.4V
Up to 1.3A
OUT2
Adjustable, or
0.8V to 4.4V
Up to 1.0A
OUT3
Adjustable, or
0.8V to 4.4V
Up to 0.55A
OUT4
0.9V to 3.3V
Up to 360mA
OUT5
0.9V to 3.3V
Up to 360mA
OUT6
0.9V to 3.3V
Up to 30mA
ActivePath
TM
&
Single-Cell Li+
Battery Charger
ACT8810
Active
PMU
TM
REG6
RTC_LDO
Innovative Power
TM
ActivePMU
TM
and
ActivePath
TM
are trademarks of Active-Semi.
I
2
C
TM
is a trademark of NXP.
-1-
www.active-semi.com
Copyright © 2010 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
