s-8426a Seiko Instruments Inc., s-8426a Datasheet - Page 14

• Manufacturer Part Number: s-8426a
• Description: Battery Backup Switching Ic
• Manufacturer: Seiko Instruments Inc.

14
BATTERY BACKUP SWITCHING IC
S-8426A Series
Standard Circuit
Precautions
Caution 1.
• In applications with small I
• Attach the proper capacitor to the VOUT pin to prevent the RESET voltage detector (which monitors the VOUT pin)
• Watch for overshoot and ensure it does not exceed the ratings of the IC chips and/or capacitors attached to the VRO
• Add a 10 µF or more capacitor to the VOUT and VRO pins.
• When V
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
• SII claims no responsibility for any and all disputes arising out of or in connection with any infringement by products
standard levels. Set I
from coming active due to undershoot.
and VOUT pins.
when V
the 4 ms interval or more after the rise of V
protection circuit.
including this IC of patents owned by a third party.
2.
BAT
IN
rises from the voltage more than V
Be sure to add a 10 µF or more capacitor to the VOUT and VRO pins.
The above connections and values will not guarantee correct operation. Before setting these
values, perform sufficient evaluation on the application to be actually used.
is more than the PREEND release voltage. Thus when monitoring the PREEND pin, make sure to take
6 V
RO
and I
+
10 µF
RO
OUT
or I
OUT
to 10 µA or more.
VSS
VIN
, the output voltages V
CS
S-8426A
Series
V
100 kΩ
IN
Seiko Instruments Inc.
VRO
OUT
.
SW1
PREEND
, a low pulse of less than 4 ms flows through the PREEND pin even
RESET
VOUT
VBAT
Figure 17
V
100 kΩ
OUT
RO
V
100 kΩ
and V
OUT
+
+
10 µF
10 µF
V
OUT
OUT
may rise, causing the load stability to exceed
V
0.1 µF
RO
1 kΩ
3 V
Rev.1.0
_00