S-8426AAA-J8T1X Datasheet, PDF (19/37 Pages) Seiko Instruments Inc – BATTERY BACKUP SWITCHING IC

Rev.2.0_02
BATTERY BACKUP SWITCHING IC
S-8426A Series
1. 3 Reference data: Dependency of output current (IOUT), load capacitance (COUT), input variation width
(ΔVIN), temperature (Ta)
For reference, the following pages describe the results of measuring the ringing amounts at the VOUT and VRO
pins using the output current (IOUT), load capacitance (COUT), input variation width (ΔVIN), and temperature (Ta) as
parameters.
(1) IOUT Dependency
(a) VOUT pin
C_OUT = 22 μF, V_IN = 6↔10 V, Ta = 25 °C
0.25
(b) VRO pin
C_RO = 22 μF, V_IN = 6↔10 V, Ta = 25 °C
0.25
0.20
0.20
0.15
0.15
0.10
0.10
0.05
0.05
0.00
0
20
40
60
I_OUT (mA)
Figure 29
0.00
0
20
40
60
I_RO (mA)
Figure30
Overshoot
Undershoot
(2) COUT Dependency
(a) VOUT pin
I_OUT = 50 mA, V_IN = 6↔10 V, Ta = 25 °C
0.50
0.40
(b) VRO pin
I_RO = 30 mA, V_IN = 6↔10 V, Ta = 25 °C
0.50
0.40
0.30
0.30
0.20
0.20
0.10
0.10
0.00
0
10 20 30 40 50
C_OUT (μF)
Figure 31
0.00
0
10 20 30 40 50
C_RO (μF)
Figure32
Overshoot
Undershoot
19