S-8426AAA-J8T1X Datasheet, PDF (17/37 Pages) Seiko Instruments Inc – BATTERY BACKUP SWITCHING IC

Rev.2.0_02
BATTERY BACKUP SWITCHING IC
S-8426A Series
 Transient Response
1. Line Transient Response Against Input Voltage Variation
The input voltage variation differs depending on whether the power supply input (0 to 10 V square wave) is applied
or the power supply variation (6 V and 10 V square waves) is applied. This section describes the ringing waveforms
and parameter dependency of each type. The test circuit is shown for reference.
1. 1 Power supply application: 0 to 10 V Square wave
Input voltage
0V
10 V
Output voltage
Overshoot
Undershoot
Fast amplifier
P.G.
VIN _{S-8426A VOUT}
Series
VSS
C_OUT
Oscillo
scope
R_L
Figure 21 Power Supply Application:
0 to 10 V Square Wave
Figure 22 Test Circuit
VOUT pin
C_OUT = 22 μF, I_OUT = 50 mA, Ta = 25 °C
10 V
Input Voltage
(5 V/div) _{0 V}
VRO pin
C_RO = 22 μF, I_RO = 30 mA, Ta = 25 °C
Input Voltage
(5 V/div)
10 V
0V
Output Voltage
(0.5 V/div)
t (100 μs/div)
Figure 23 Ringing Waveform of Power Supply
Application (VOUT Pin)
Output Voltage
(0.5 V/div)
t (100 μs/div)
Figure 24 Ringing Waveform of Power Supply
Application (VRO Pin)
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