S-8363B-I6T1U2 Datasheet, PDF (12/50 Pages) Seiko Instruments Inc – PWM/PFM SWITCHABLE SWITCHING REGULATOR

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR
S-8363 Series
Rev.2.0_01
3. 2 VOUT voltage at start-up < STU release voltage
After ON / OFF =“H”, step-up starts by the start-up operation. When the VOUT voltage reaches the STU release
voltage, the soft-start starts.
Since the length of the start-up period largely varies depending on the input voltage, load current, external parts
and ambient temperature, the soft-start time varies according to them. Perform sufficient evaluation with actual
application.
Input voltage
(V_IN)
0V
Output voltage
(VOUT)
STU release
Reference voltage
from
error amplifier
0V
0V
ON/OFF
voltage _{0 V}
Soft-start time (t_ss)
V_OUT × 0.90
Start-up period
Soft-start period
Figure 11
Time [s]
12