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ADP3408ARU-25 Datasheet(PDF) 1 Page - Analog Devices |
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ADP3408ARU-25 Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page 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. a ADP3408 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., 2001 GSM 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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