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ADP3408

Analog Devices
Part Number ADP3408
Manufacturer Analog Devices
Description GSM Power Management System
Published Mar 23, 2005
Detailed Description a FEATURES Handles all GSM Baseband Power Management Six LDOs Optimized for Specific GSM Subsystems Li-Ion and NiMH Batt...
Datasheet PDF File ADP3408 PDF File

ADP3408
ADP3408

Overview
a 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 GSM Power Management System ADP3408 FUNCTIONAL BLOCK DIAGRAM VBAT VBAT2 VRTCIN SIM LDO DIGITAL CORE LDO ANALOG LDO POWER-UP SEQUENCING AND PROTECTION LOGIC TCXO LDO MEMORY LDO RTC LDO REF BUFFER VSIM VCORE PWRONKEY ROWX PWRONIN VAN VTCXO TCXOEN SIMEN VMEM VRTC GENERAL DESCRIPTION RESCAP 26 REFOUT 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.
RESET CHRDET EOC CHGEN GATEIN BATSNS ISENSE GATEDR CHRIN BATTERY CHARGE CONTROLLER BATTERY CHARGE DIVIDER MVBAT DGND ADP3408 27 AGND REV.
0 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.
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, 2001 1 (–20؇C ≤ T ≤ +85؇C, VBAT = VBAT2 = 3 V–5.
5 V, CVSIM = CVCORE = CVAN = ADP3408–SPECIFICATIONS CVMEM = 2.
2 ␮F, VTCXO = 0.
22 ␮F, CVRTC = 0.
1 ␮F, CVBAT = 10 ␮F, minimum loads applied on all outputs, unless...


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