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S-8425AAAFT-TB-X Datasheet, PDF (7/45 Pages) Seiko Instruments Inc – BATTERY BACKUP SWITCHING IC | |||
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Rev.3.1_01
BATTERY BACKUP SWITCHING IC
S-8425 Series
ï® Electrical Characteristics
S-8425AAAFT, S-8425AAAPA
Item
Output voltage 1
Dropout voltage 1
Load stability 1
Table 2
Symbol
VRO
Vdrop1
ÎVRO1
Electrical Characteristics
(Ta = 25°C, Unless otherwise specified)
Condition
Min.
Typ.
Max.
Unit
Test
Circuit
VIN = 7.2 V, IRO = 3 mA
2.940
3.000 3.060
V
IRO = 3 mA
â
41
59
mV
VIN =7.2 V, IRO = 100 μA to 20 mA
â
50
100
mV
Input stability 1
V
o Output voltage temperature coefficient 1
l
t Output voltage 2
a Dropout voltage 2
g
e Load stability 2
ÎVRO2
ÎVRO
ÎTa ⢠VRO
VOUT
Vdrop2
ÎVOUT1
VIN = 4 V to 16 V, IRO = 3 mA
Ta = â40°C to +85°C
VIN = 7.2 V, IOUT = 23 mA
IOUT = 23 mA
VIN = 7.2 V, IOUT = 100 μA to 60 mA
â
â
2.940
â
â
r Input stability 2
e
g Output voltage temperature coefficient 2
u
l Output voltage 3
a
t
Dropout voltage 3
o Load stability 3
r
Input stability 3
ÎVOUT2
ÎVOUT
ÎTa ⢠VOUT
VCH
Vdrop3
ÎVCH1
ÎVCH2
VIN = 4 V to 16 V, IOUT = 23 mA
Ta = â40°C to +85°C
VIN = 7.2 V, ICH = 3 mA
ICH = 3 mA
VIN = 7.2 V, ICH = 100 μA to 10 mA
VIN = 4.3 V to 16 V, ICH = 3 mA
â
â
3.234
â
â
â
Output voltage temperature coefficient 3
ÎVCH
ÎTa ⢠VCH
Ta = â40°C to +85°C
â
Primary power input voltage
V CS detection voltage
o
l
CS release voltage
t RESET detection voltage
a RESET release voltage
g
e RESET release delay time
VIN
âVDET1
+VDET1
âVDET2
+VDET2
tDELAY
â
VIN voltage detection
â
VOUT voltage detection
â
â
â
3.234
3.319
2.156
2.256
0.3
Operating voltage
d
e
t Detection voltage temperature coefficient
e
c
t
o Sink current
r
Vopr
Î â VDET1
ÎTa ⢠(âVDET1)
Î â VDET2
ÎTa ⢠(âVDET2)
ISINK
VIN or VBAT
Ta = â40°C to +85°C
Ta = â40°C to +85°C
VDS = 0.5 V
VIN = VBAT = 2.0 V
RESET
CS
1.7
â
â
1.50
1.50
Leakage current
ILEAK
VDS = 16 V, VIN = 16 V
â
S Switch voltage
w
i
t
CS output inhibit voltage
c
h
VBAT switch leakage current
u VBAT switch resistance
n
i Switch voltage temperature coefficient
t
CS output inhibit voltage temperature
coefficient
VSW1
VBAT = 2.8 V, VIN voltage detection
VSW2
ILEAK
RSW
ÎVSW1
ÎTa ⢠VSW1
ÎVSW 2
ÎTa ⢠VSW2
VBAT = 3 V, VOUT voltage detection
VIN = 3.6 V, VBAT = 0 V
VIN = Open, VBAT = 3 V,
IOUT = 10 μA to 500 μA
Ta = â40°C to +85°C
Ta = â40°C to +85°C
+VDET1
à 0.83
VOUT
à 0.93
â
â
â
â
T
o
t Current consumption
a
l
Backup power supply input voltage
ISS1
IBAT1
IBAT2
VBAT
VIN = 3.6 V, Unload
â
VBAT = 3 V
â
VIN = Open, VBAT = 3 V Ta = 25°C
â
Unload
Ta = 85°C
â
â
2.0
Remark The number in the Test Circuit column corresponds to the circuit number in the Test Circuits section.
5
±100
3.000
187
50
5
±100
3.300
90
50
5
±100
â
3.300
3.401
2.200
2.312
0.8
â
±100
20
mV
â
ppm/°C
3.060
V
252
mV
100
mV
20
mV
â
ppm/°C
3.366
V
120
mV
100
mV
20
mV
â
ppm/°C
16
V
3.366
V
3.482
V
2.244
V
2.367
V
â
ms
16
V
â
ppm/°C
±100
2.30
2.30
â
+VDET1
à 0.85
VOUT
à 0.95
â
30
â
ppm/°C
â
mA
â
mA
0.1
μA
+VDET1
V
à 0.87
VOUT
V
à 0.97
0.1
μA
60
Ω
±100
â
ppm/°C
±100
7
â
1.0
â
â
â
ppm/°C
15
μA
0.1
μA
2.1
μA
3.5
μA
4.0
V
1
2
9
2
3
4
5
6
7
4
5
8
7
7
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