S-19500A03A-E8T1U4 Datasheet, PDF (12/52 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
3. 2 S-19501 Series (Product without watchdog enable function)
Table 13
Item
Watchdog activation
threshold current
Watchdog deactivation
threshold current
Watchdog activation
hysteresis current
Watchdog activation
threshold voltage
WADJ pin current ratio
WADJ pin internal resistance
Watchdog output voltage "H"
Watchdog output voltage "L"
Watchdog pull-up resistance
Watchdog output current
Charge current
Discharge current
Upper timing threshold
voltage
Lower watchdog timing
threshold voltage
Watchdog output
pulse period
Watchdog output "L" time
Watchdog trigger time
Symbol
(VIN = 13.5 V, Tj = −40°C to +150°C unless otherwise specified)
Condition
Min.
Typ. Max.
Unit
Test
Circuit
IO,WDact WADJ pin is open
1.1
1.5
1.9
mA
7
IO,WDdeact WADJ pin is open
−
1.3
−
mA
7
IO,WDhys WADJ pin is open
0.1
0.2
−
mA
7
VWADJ,th
−
IOUT
IWADJ
RWADJ,int
VWADJ = 0 V, IOUT = 10 mA
−
VWOH
−
VWOL
RWO
IWO
ID,cha
ID,dcha
RextW ≥ 3 kΩ,
Connect to VOUT pin
VOUT pin internal resistance
VWO = 0.4 V,
VOUT = −VDET(S) − 0.1 V
VDLY = 1.0 V
VDLY = 1.0 V
VDU
−
1.28 1.35 1.45
V
8
−
750
−
−
8
490
650
845
kΩ
−
VOUT(S)
× 0.9
−
−
V
13
−
0.2
0.4
V
13
20
30
45
kΩ
−
3.0
−
−
mA
14
2
5
8
μA
9
0.6
1.3
2.0
μA
9
1.5
1.9
2.3
V
9
VDWL
−
0.5
0.7
0.9
V
9
tWD,p
tWD,l
tWI,tr
CDLY = 47 nF
VOUT > −VDET, CDLY = 47 nF
Watchdog timer is activated
CDLY = 47 nF
38
54
72
ms
7
6
11
16
ms
7
32
43
56
ms
7
VDLY
VDU
VDWL
t
tWI,tr
tWD,l
VWO
tWD,p
t
Figure 6
12