Fujitsu MB3891 Manual De Usuario

ASSP  For Power Management Applications (Mobile Phones)

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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.

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• Supply voltage range

 :  3 V to 5.5 V

• Low power consumption current during standby

 :  400 

µ

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

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64-pin plastic LQFP

 (FPT-64P-M03)