Fujitsu MB3891 - Manual

Fujitsu MB3891

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Table of Contents:

  • Page 2 – PIN ASSIGNMENT
  • Page 3 – PIN DESCRIPTION; Symbol
  • Page 4 – Supply voltage for LDO4.
  • Page 5 – BLOCK DIAGRAM
  • Page 7 – ELECTRICAL CHARACTERISTICS; Parameter
  • Page 11 – mV
  • Page 13 – TYPICAL CHARACTERISTICS
  • Page 14 – Dropout voltage V; Load current I; Output voltage V
  • Page 15 – Waveform at rapid change of output load
  • Page 16 – Waveform at rapid change of output load (LDO1); Waveform at rapid change of output load (LDO2); Waveform at rapid change of output load (LDO2)
  • Page 17 – Power supply current I
  • Page 22 – Power dissipation P
  • Page 23 – FUNCTIONAL DESCRIPTION
  • Page 24 – P Interface; microprocessor and SIM card.; SETTING THE XPOWERGOOD TIME
  • Page 25 – OPERATION TIMING CHART; Input
  • Page 26 – APPLICATION EXAMPLE
  • Page 27 – USAGE PRECAUTIONS; • Take appropriate static electricity measures.; to 1 M; • Do not apply negative voltages; ORDERING INFORMATION; Part number
  • Page 28 – PACKAGE DIMENSION; Note : Pins width and pins thickness include plating thickness.
  • Page 29 – FUJITSU LIMITED; FUJITSU LIMITED Printed in Japan
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DS04-27801-1E

FUJITSU SEMICONDUCTOR

DATA SHEET

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 suppor t 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 (Smar tCard) 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

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

PACKAGE

64-pin plastic LQFP

(FPT-64P-M03)

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Summary

Page 2 - PIN ASSIGNMENT

MB3891 2 ■ ■ ■ ■ PIN ASSIGNMENT (TOP VIEW) (FPT-64P-M03) 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 N.C. : 1 N.C. : 2 OUT3 : 3 OUT3 : 4 GND3 : 5 OUT2 : 6 OUT2 : ...

Page 3 - PIN DESCRIPTION; Symbol

MB3891 3 ■ ■ ■ ■ PIN DESCRIPTION (Continued) Pin No. Symbol I/O Descriptions 1, 2 N.C.  Non connection. 3, 4 OUT3 O LDO3 output pin. 5 GND3  LDO3 ground pin. 6, 7 OUT2 O LDO2 output pin. 8, 9, 10, 11 VBAT1  Battery voltage input pin for LDO1 and LDO2. 12, 13 OUT1 O LDO1 output pin. 14 CONT1 I Pow...

Page 4 - Supply voltage for LDO4.

MB3891 4 (Continued) Pin No. Symbol I/O Descriptions 42, 43 VBAT4  Supply voltage for LDO4. 44 CONT4 I OUT4 output voltage selection (“L”=2.8 V,“H”=2.5 V). 45 SW1-OUTPUT O Output of general purpose switch number 1 (Drain). 46 SW1-INPUT I Input of general purpose switch number 1 (Source). 47 SW3-OUT...

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