S-19500A03A-E8T1U4 Datasheet, PDF (42/52 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. Watchdog timer block
3. 1 Watchdog trigger time vs. Junction temperature
3. 1. 1 VOUT = 3.3 V
60
VIN = 13.5 V
50
40
30
20
10
0
40 25 0
25 50 75 100 125 150
Tj [C]
3. 1. 2 VOUT = 5.0 V
60
VIN = 13.5 V
50
40
30
20
10
0
40 25 0
25 50 75 100 125 150
Tj [C]
3. 2 Watchdog trigger time vs. Capacitance for delay time adjustment capacitor
3. 2. 1 VOUT = 3.3 V
10000
1000
100
Tj = 150C
Tj = 125C
VIN = 13.5 V
3. 2. 2 VOUT = 5.0 V
10000
1000
100
Tj = 150C
Tj = 125C
VIN = 13.5 V
10
1
0.1
1
Tj = 25C
Tj = 40C
10
100
CDLY [nF]
1000
10
1
0.1
1
Tj = 25C
Tj = 40C
10
100
CDLY [nF]
1000
3. 3 Charge current, discharge current vs. Junction temperature
3. 3. 1 VOUT = 3.3 V
8
ID,cha
6
VIN = 13.5 V
3. 3. 2 VOUT = 5.0 V
8
ID,cha
6
VIN = 13.5 V
4
ID,dcha
2
4
ID,dcha
2
0
40 25 0
25 50 75 100 125 150
Tj [°C]
0
40 25 0
25 50 75 100 125 150
Tj [°C]
3. 4 Upper timing threshold voltage, lower watchdog timing threshold voltage, lower reset timing threshold voltage vs. Junction temperature
3. 4. 1 VOUT = 3.3 V
2.5
2.0
VIN = 13.5 V
VDU
3. 4. 2 VOUT = 5.0 V
2.5
2.0
VIN = 13.5 V
VDU
1.5
VDWL
1.0
VDRL
1.5
1.0
VDWL
VDRL
0.5
0.5
0.0
40 25 0
25 50 75 100 125 150
Tj [C]
42
0.0
40 25 0
25 50 75 100 125 150
Tj [C]