ADP3408ARU-1.8 Просмотр технического описания (PDF) - Analog Devices
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ADP3408ARU-1.8 Datasheet PDF : 20 Pages
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GSM Power Management System
ADP3408
FEATURES
Handles All GSM Baseband Power Management
6 LDOs Optimized for Specific GSM Subsystems
Li-Ion and NiMH Battery Charge Function
Optimized for the AD20msp430 Baseband Chipset
APPLICATIONS
GSM/DCS/PCS/CDMA Handsets
GENERAL DESCRIPTION
The ADP3408 is a multifunction power system chip optimized
for GSM handsets, especially those based on the Analog Devices
AD20msp430 system solution. It contains six LDOs, one to
power each of the critical GSM subblocks. Sophisticated con-
trols are available for power-up during battery charging, keypad
interface, and RTC alarm. The charge circuit maintains low
current charging during the initial charge phase and provides an
end-of-charge signal when a Li-ion battery is being charged.
The ADP3408 is specified over the temperature range of –20°C to
+85°C and is available in a narrow body TSSOP 28-lead package
or 5 mm ϫ 5 mm LFCSP 32-lead package.
FUNCTIONAL BLOCK DIAGRAM
VBAT VBAT2 VRTCIN
PWRONKEY
ROWX
PWRONIN
TCXOEN
SIMEN
RESCAP
CHRDET
EOC
CHGEN
GATEIN
BATSNS
ISENSE
GATEDR
CHRIN
POWER-UP
SEQUENCING
AND
PROTECTION
LOGIC
SIM
LDO
DIGITAL
CORE LDO
ANALOG
LDO
TCXO
LDO
MEMORY
LDO
RTC
LDO
REF
BUFFER
VSIM
VCORE
VAN
VTCXO
VMEM
VRTC
26 REFOUT
RESET
BATTERY
CHARGE
CONTROLLER
BATTERY
CHARGE
DIVIDER
ADP3408
MVBAT
DGND
27 AGND
(Pin Assignment Is for TSSOP Option)
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
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