S-8425AAAFT-TB-X Datasheet, PDF (9/45 Pages) Seiko Instruments Inc – BATTERY BACKUP SWITCHING IC

Rev.3.1_01
 Test Circuits
1.
V_IN
VIN VRO, VOUT
or VCH
↓
VSS
10 μF ^V
BATTERY BACKUP SWITCHING IC
S-8425 Series
2.
V_IN
V
100 kΩ
VBAT VOUT
VIN
VSS
RESET
CS
V
100 kΩ
V
3.
5.
F.G.
VBAT VOUT _CS
A
VIN
VSS
RESET
A
V_DS
VIN
VOUT
VSS _VBAT CS
V_BAT
Oscilloscope
100 kΩ
Oscilloscope
4.
VIN
VOUT
V_IN
VBAT
V
V_BAT
VSS
V
Measure the value after applying 6 V to VIN.
6.
VIN
VBAT
V_IN
A
VSS
7.
V_IN
8.
VIN
VOUT
VBAT
V_BAT
VSS
I_OUT
↓_V
I_{SS A}
A I_BAT
V_IN
V_BAT
VIN
VBAT
VSS
Leave open and measure the value after applying 6 V to VIN.
9.
To measure I_BAT2, apply 6 V to VIN and then leave VIN open
and measure I_BAT.
VOUT
VIN
VSS
RESET
100 kΩ
Oscilloscope
Figure 4 Test Circuits
9