Datasheet Summary
FUJITSU SEMICONDUCTOR DATA SHEET
DS04-27801-1E
ASSP For Power Management Applications (Mobile Phones)
Power Management IC for GSM Mobile Phone
MB3891 s DESCRIPTION
MB3891 is intended to be used in future GSM-phones, Dual Band phones and Dual Mode phones. It contains all the necessary functions to support all Digital, Analog and RF blocks in these phones. A Charge-pump including a Logic Level Translation circuit is built in to support SIM-card (SmartCard) of both 3 and 5 Volt technology. The circuit contains a charger for a rechargeable Lithium coin cell of a Real Time Clock. A plex control circuit is built in to generate main reset and to turn on and off the different LDO’s. s...