LTC2902
TYPICAL PERFOR A CE CHARACTERISTICS
I
V4
vs Temperature
1.0
TYPICAL TRANSIENT DURATION (µs)
TYPICAL TRANSIENT DURATION (µs)
V1 = 5V
0.9 V2 = 3.3V
V3 = 2.5V
0.8
V4 = 1.8V
0.7
I
V4
(µA)
0.6
0.5
0.4
0.3
0.2
0.1
0
– 60 –40 – 20 0 20 40 60
TEMPERATURE (°C)
80
100
RST Output Voltage
vs V1, V
PG
= 0V
5
RESET TIME-OUT PERIOD, t
RST
(ms)
RESET TIME-OUT PERIOD, t
RST
(sec)
RST OUTPUT VOLTAGE (V)
4
V1 = V2 = V3 = V4
10k PULL-UP FROM RST TO V1
T
A
= 25°C
3
2
1
0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
V1 (V)
2902 G15
RST, COMPX I
SINK
vs Supply Voltage
10
9
8
7
I
SINK
(mA)
6
5
4
3
2
1
0
0
1
2
3
4
V1 OR V2 (V)
5
6
2902 G18
T
A
= 25°C
V
OL
= 0.4V
2.0
V
OL
(V)
1.5
1.0
0.5
0
V
OH
(V)
V
OL
= 0.2V
6
U W
2902 G13
Typical Transient Duration
vs Comparator Overdrive (V1, V2)
450
400
350
300
250
200
150
100
50
0
0.1
1
10
100
RESET COMPARATOR OVERDRIVE VOLTAGE (% OF V
RTX
)
2902 G14
Typical Transient Duration
vs Comparator Overdrive (V3, V4)
220
200
180
160
140
120
100
80
60
40
20
0
1
10
100
0.1
RESET COMPARATOR OVERDRIVE VOLTAGE (% OF V
RTX
)
2902 G25
T
A
= 25°C
T
A
= 25°C
RESET OCCURS
ABOVE CURVE
RESET OCCURS
ABOVE CURVE
Reset Time-Out Period
vs Temperature
8.9
C
RT
= 1500pF
(SILVER MICA)
8.4
7.9
7.4
6.9
6.4
5.9
5.4
4.9
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80
100
Reset Time-Out Period
vs Capacitance
10
T
A
= 25°C
1
100m
10m
1m
100µ
10p
100p
10n
1n
C
RT
(FARAD)
100n
1µ
2902 G17
2902 G16
RST, COMPX Voltage Output Low
vs Output Sink Current
3.0
V2 = 3V
V1 = 5V
2.5
85°C
– 40°C
2.5
2.0
25°C
3.0
3.5
RST High Level Output Voltage
vs Output Source Current
(LTC2902-2)
V1 = 5V
V2 = 3V
V3 = 2.5V
V4 = 1V
– 40°C
1.5
1.0
85°C
0.5
0
25°C
0
10
20
30
50 60
I
SINK
(mA)
40
70
80
90
0
0.5
1
1.5
I
SOURCE
(mA)
2
2.5
2902 G20
2902 G19
2902f
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
