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| 型號(hào)： | ADP3408ARU-2.5 |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 198K |
| 代理商： | ADP3408ARU-2.5 |
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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.
a
ADP3408
Tel: 781/329-4700Fax: 781/326-8703
Analog Devices, Inc., 2001GSM Power Management System
FUNCTIONAL BLOCK DIAGRAM
ADP3408
27
26
BATTERY
CHARGE
CONTROLLER
POWER-UP
SEQUENCING
AND
PROTECTION
LOGIC
SIM
LDO
DIGITAL
CORE LDO
ANALOG
LDO
TCXO
LDO
MEMORY
LDO
RTC
LDO
REF
BUFFER
BATTERY
CHARGE
DIVIDER
VBAT
VBAT2 VRTCIN
PWRONKEY
ROWX
PWRONIN
TCXOEN
SIMEN
RESCAP
CHRDET
EOC
CHGEN
GATEIN
BATSNS
ISENSE
GATEDR
CHRIN
VSIM
VCORE
VAN
VTCXO
VMEM
VRTC
REFOUT
RESET
MVBAT
DGND
AGND
FEATURES
Handles all GSM Baseband Power Management
Six 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 sub-blocks. Sophisticated
controls 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 narrow body TSSOP-28 pin package.
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