MB3790 데이터 시트보기 (PDF) - Fujitsu

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MB3790

Battery Backup IC

Fujitsu 

MB3790

s BLOCK DIAGRAM

V IN

CONTROL

V SENSE

GND

R ON =0.5Ω

590KΩ

Reference

voltage power

1.24V supply circuit

+

SQ

-

R

240KΩ

Vth:1.5V

100Ω

500Ω

3 µA

SBD

2.65V

V IN

+

-

2.37V

V IN

+

-

V OUT

Vth:3V

V OUT

V OUT

ALARM1

ALARM2

RESET

RESET

CT

V BAT2 V BAT1

3

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