FUJITSU SEMICONDUCTOR DATA SHEET
DS04-27801-1E
ASSP For Power Management Applications (Mobile Phones)
Power Managemen...
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 complex control circuit is built in to generate main reset and to turn on and off the different LDO’s.
s FEATURES
Supply
voltage range : 3 V to 5.5 V Low power consumption current during standby : 400 µA (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
s PACKAGE
64-pin plastic LQFP
(FPT-64P-M03)
MB3891
s PIN ASSIGNMENT
(TOP VIEW)
47 : SW3-OUTPUT 45 : SW1-OUTPUT
48 : SW3-INPUT
46 : SW1-INPUT
N.C. : 49 N.C. : 50 SW2-OUTPUT : 51 SW2-INPUT : 52 SW1-ON : 53 SW2-ON : 54 SW3-ON : 55 CONT3 : 56 CONT5 : 57 OUT5 : 58 GND5 : 59 VBAT3 : 60 VBAT3 : 61 VBAT3 : 62 N.C. : 63 N.C. : 64
33 : RESET-IN
44 : CONT4
34 : CLK-IN
43 :...