Datasheet

5
LTC2903-1
29031f a
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Transient Duration
vs Comparator Overdrive
Reset Time-Out Period
vs Temperature
RST Output Voltage with 10k
Pull-Up to V1
RST Output Voltage with
10k Pull-Up to V1
RESET COMPARATOR OVERDRIVE (% OF V
RTX
)
0.1
250
TYPICAL TRANSIENT DURATION (µs)
300
350
400
1 10 100
29031 G10
200
150
50
0
100
RESET OCCURS
ABOVE CURVE
TEMPERATURE (°C)
–50
140
RESET TIME-OUT PERIOD, t
RST
(ms)
160
180
200
220
260
–25
02550
29301 G11
75 100
240
V1 (V)
0
RST OUTPUT VOLTAGE (V)
3.0
4.0
5.0
4
29031 G12
2.0
1.0
2.5
3.5
4.5
1.5
0.5
0
10.5
21.5
3 3.5 4.5
2.5
5
V1 = V2 = V3
LTC2903-B1, -C1
V1 (V)
0
RST OUTPUT VOLTAGE (V)
0.15
0.20
0.25
0.30
0.8
29301 G13
0.10
0.05
0
0.2
0.4
0.6
1.0
0.7
0.1
0.3
0.5
0.9
V1 ONLY
V1 = V2 = V3
Low Voltage Reset Pull-Down
Performance vs External Pull-Up
Current and Input Supply Voltage
V
IN
, INPUT SUPPLY VOLTAGE (V)
0
RESET PIN VOLTAGE (V)
0.06
0.08
0.10
0.8
29031 G14
0.04
0.02
0.05
0.07
0.09
0.03
0.01
0
0.20.1
1µA
0.40.3
0.6 0.7 0.9
0.5
1
2µA
5µA
20µA
V
IN
= V1 = V2 = V3
10µA
RST Current Sink Capability
vs V
CC
V
CC
(V)
0
I
RST
(mA)
9
12
15
1.5 2.5 5
29031 G15
6
3
0
0.5 1
2
3 3.5 4 4.5
V
OL
= 0.4V
V
OL
= 0.2V
RST Voltage Output Low
vs RST Sink Current
I
RST
(mA)
0
0
V
OL
(V)
0.3
0.9
1.2
1.5
10
20
25 45
29031 G16
0.6
515
30
35
40
LTC2903-A1, -E1
V1 = 3.3V
85°C
25°C
–45°C
I
RST
(mA)
0
0
V
OL
(V)
0.3
0.9
1.2
1.5
10
20
60
29031 G16
0.6
30
40 50
LTC2903-B1, -C1, -D1
V1 = 5V
85°C
25°C
–45°C
RST Voltage Output Low
vs RST Sink Current
Supply Currents vs Temperature
TEMPERATURE (°C)
–50
0
I
V1
(µA)
5
10
15
20
25
–25
02550
29031 G20
75 100
LTC2903-E1
LTC2903-D1