Fujitsu - MB3891

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Contents

FUJITSU SEMICONDUCTOR DATA SHEET DS04 27801 1E ASSP For Power Management Applications Mobile Phones Power Management IC for GSM Mobile Phone MB3891 DESCRIPTION MB3891 is intended to be used in future GSM phones Duai Band phones and Duai Mode phones It contains aii the necessary functions to support aii Digitai Anaiog and RF biocks in these phones A Charge pump inciuding a Logic Levei Transiation circuit is buiit in to support SIM card SmartCard of both 3 and 5 Voit technoiogy The circuit contains a charger for a rechargeabie Lithium coin ceii of a Real Time Ciock A compiex controi circuit is buiit in to generate main reset and to turn on and off the different LDO s FEATURES Suppiy voitage range 3 V to 5 5 V Low power consumpt ...