MB3790 Datasheet, PDF (8/21 Pages) Fujitsu Component Limited. – Battery Backup IC

MB3790
s ABSOLUTE MAXIMUM RATINGS
Parameter
Input voltage
Battery voltage
Reset output Voltage
Alarm output Voltage
Output current
Output high current
Output low current
Power dissipation
Storage temperature
Symbol
VIN
VBAT
VRESET
VALARM
IOUT
IOH
IOL
PD
Tstg
Conditions
—
Source current
Sink current
Ta ≤ +25°C
SSOP
SOP
—
Rating
–0.3 to 6
–0.3 to 6
– 0.3 to VOUT + 0.3 (≤ 6)
– 0.3 to VIN + 0.3 (≤ 6)
250
6
6
450*
540*
–55 to +125
(Ta = +25°C)
Unit
V
V
V
V
mA
mA
mA
mW
mW
°C
* : When mounted on a 4 cm-square double-side epoxy board.
WARNING: Permanent device damage may occur if the above ABSOLUTE MAXIMUM RATINGS are exceeded.
Functional operation should be restricted to the conditions as detailed in the operational sections of
this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
s RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Input voltage
VIN
Battery voltage
VBAT
Output current
IOUT
Output current during
battery backup
IO(BAT1)
IO(BAT2)
Operating temperature Top
Conditions
—
Supply from the
primary battery
Supply from the
secondary battery
—
Value
Unit
Min.
Typ.
Max.
—
5.0
5.5
V
—
3.0
3.3
V
0
—
200
mA
—
—
500
µA
—
—
50
–30
—
+70
°C
8