6
LTC2901
2901fb
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Typical Transient Duration
vs Comparator Overdrive (V1, V2)
RST Output Voltage
vs V1, V
PG
= 0V
Reset Time-Out Period
vs Temperature
I
V2
vs Temperature I
V3
vs Temperature
I
V4
vs Temperature
TEMPERATURE (°C)
–60
0.5
I
V2
(μA)
0.6
0.8
0.9
1.0
1.5
1.2
–20
20
40
2901 G10
0.7
1.3
1.4
1.1
–40 0
60
80
100
V1 = 5V
V2 = 3.3V
V3 = 2.5V
V4 = 1.8V
RESET COMPARATOR OVERDRIVE VOLTAGE (% OF V
RTX
)
0.1
250
TYPICAL TRANSIENT DURATION (μs)
300
350
400
450
110100
2901 G13
200
150
50
0
100
RESET OCCURS
ABOVE CURVE
T
A
= 25°C
V1 (V)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
RST OUTPUT VOLTAGE (V)
2901 G14
5
4
3
2
1
0
V1 = V2 = V3 = V4
10k PULL-UP FROM RST TO V1
T
A
= 25°C
TEMPERATURE (°C)
–60 –40
WATCHDOG TIME-OUT PERIOD, t
WD
(ms)
34
38
36
60 80
2901 G15
32
30
–20 0 20 40 100
26
22
28
24
C
WT
= 1500pF
(SILVER MICA)
Watchdog Time-Out Period
vs Temperature
TEMPERATURE (°C)
–60
0.1
I
V3
(μA)
0.2
0.4
0.5
0.6
1.1
0.8
–20
20
40
2901 G11
0.3
0.9
1.0
0.7
–40 0
60
80
100
V1 = 5V
V2 = 3.3V
V3 = 2.5V
V4 = 1.8V
TEMPERATURE (°C)
–60
0
I
V4
(μA)
0.1
0.3
0.4
0.5
1.0
0.7
–20
20
40
2901 G12
0.2
0.8
0.9
0.6
–40 0
60
80
100
V1 = 5V
V2 = 3.3V
V3 = 2.5V
V4 = 1.8V
RESET COMPARATOR OVERDRIVE VOLTAGE (% OF V
RTX
)
0.1
80
TYPICAL TRANSIENT DURATION (μs)
100
120
140
160
1 10 100
2901 G22
60
40
20
0
200
180
220
T
A
= 25°C
RESET OCCURS
ABOVE CURVE
Typical Transient Duration
vs Comparator Overdrive (V3, V4)
TEMPERATURE (°C)
–60
4.9
RESET TIME-OUT PERIOD, t
RST
(ms)
5.9
6.4
6.9
8.9
7.9
–20
20
40
2901 G16
5.4
8.4
7.4
–40 0
60
80
100
C
RT
= 1500pF
(SILVER MICA)
I
V1
vs Temperature
TEMPERATURE (°C)
–60
0
I
V1
(μA)
10
30
40
50
100
70
–20
20
40
2901 G09
20
80
90
60
–40 0
60
80
100
V1 = 5V
V2 = 3.3V
V3 = 2.5V
V4 = 1.8V
