S-19500A03A-E8T1U4 Datasheet, PDF (8/52 Pages) Seiko Instruments Inc – CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION
S-19500/19501 Series
Rev.1.2_01
 Recommended Operation Conditions
Table 9
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
−
4.0
−
36.0
V
VIN pin voltage
VIN
When using autonomous
watchdog operation function^*1
VOUT(S)
+ 1.0
−
36.0
V
VOUT pin voltage
VOUT
Watchdog input voltage "H"^*2 VWIH
Watchdog input voltage "L"^*2 VWIL
Watchdog input "H" time^*2 thigh
Watchdog input "L" time^*2 tIow
Slew rate^*2
dVWI
dt
Watchdog input frequency fWI
Detector block
Watchdog timer block
−
−
VWI ≥ VWIH
VWI ≤ VWIL
VWI = VWIL + (VWIH − VWIL) × 0.1
to VWIL + (VWIH − VWIL) × 0.9
Duty ratio 50%
1.0
−
+VDET
−
2
−
−
−
5.0
−
5.0
−
1
−
−
−
−
V
−
V
−
V
0.8
V
−
μs
−
μs
−
V/μs
0.2
MHz
WEN pin input voltage "H" VWENH
−
2.0
−
VOUT(S)
V
WEN pin input voltage "L" VWENL
−
0
−
0.8
V
*1. Refer to "3. Watchdog timer block" in " Operation" for the autonomous watchdog operation function.
*2. When inputting a rising edge that satisfies the condition of Figure 4 to the WI pin, the watchdog timer detects a
trigger.
The signal input from the monitored object by the watchdog timer should satisfy the condition of Figure 4.
V_WI
t_low
t_high
V_WIH
V_WIL
dV_WI
dt
t
Figure 4
8