s-8425 Seiko Instruments Inc., s-8425 Datasheet - Page 13

• Manufacturer Part Number: s-8425
• Description: Battery Backup Switching Ic
• Manufacturer: Seiko Instruments Inc.

Output voltage
Output voltage
1. Line Transient Response Against Input Voltage Variation
Power Supply Application
VOUT pin
VCH pin
Input voltage
Input voltage
Rev.2.3
(0.5 V/div)
(0.5 V/div)
Output voltage
(5 V/div)
(5 V/div)
Input voltage
Transient Response
The input voltage variation differs depending on whether the power supply input (0 V 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.
Power supply application: 0 V to 10 V square wave
Figure 10 Power Supply Application:
C
Figure 12 Ringing Waveform of Power
Figure 14 Ringing Waveform of Power
OUT
C
_00
CH
Supply Application (VOUT Pin)
Supply Application (VCH Pin)
= 22 μ F, I
0 V to 10 V Square Wave
= 10 μ F, I
0V
0V
0 V
10V
10V
10 V
OUT
t (100 μ s/div)
t (100 μ s/div)
CH
= 50 mA, Ta = 25 ° C
= 10 mA, Ta = 25 ° C
Overshoot
Undershoot
Seiko Instruments Inc.
VRO pin
Output voltage
Input voltage
(0.5 V/div)
P.G.
(5 V/div)
Fast amplifier
Figure 13 Ringing Waveform of Power
C
BATTERY BACKUP SWITCHING IC
RO
Figure 11 Test Circuit
Supply Application (VRO Pin)
= 22 μ F, I
0V
VIN
10V
S-8425
Series
VSS
RO
t (100 μ s/div)
= 30 mA, Ta = 25 ° C
VOUT
C
OUT
S-8425 Series
R
L
Oscillo-
scope
13