Fujitsu MB3891 manual Description, Features, Package, Pin plastic Lqfp FPT-64P-M03

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, 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 complex control circuit is built in to generate main reset and to turn on and off the different LDO’s.

■FEATURES

•	Supply voltage range	:	3 V to 5.5 V
•	Low power consumption current during standby	:	400 ∝A (MAX)

•6-channel low-saturation voltage type series regulator

:2.1 V/2 channels, 2.8 V/3 channels, 2.5 V/2.8 V switch

•Error prevention function during Low voltage

•Power on reset function

•3 V/5 V SW for SIM-Card

• SIM interface function

•Backflow prevention function for Battery-Backup

•Temperature prevention function

■PACKAGE

64-pin plastic LQFP

(FPT-64P-M03)