Datasheet

LTC694-3.3/LTC695-3.3
6
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TYPICAL PERFORMANCE CHARACTERISTICS
Power-Fail Comparator
Response Time
Power-Fail Comparator
Response Time
Power-Fail Comparator
Response Time with Pull-Up
Resistor
Reset Active Time
vs Temperature
Reset Voltage Threshold
vs Temperature
RESET Output Voltage
vs Supply Voltage
Output Voltage vs Load Current Output Voltage vs Load Current
Power Failure Input Threshold
vs Temperature
LOAD CURRENT (mA)
0
OUTPUT VOLTAGE (V)
3.30
3.25
3.20
3.15
3.10
3.05
3.00
40
694/5-3.3 G01
10
20
30
50
SLOPE = 4.6Ω
V
CC
= 3.3V
V
BATT
= 2.4V
T
A
= 25°C
LOAD CURRENT (µA)
0
OUTPUT VOLTAGE (V)
400
694/5-3.3 G02
100
200
300
500
2.40
2.39
2.38
2.37
2.36
2.35
V
CC
= 0V
V
BATT
= 2.4V
T
A
= 25°C
SLOPE = 90Ω
TEMPERATURE (°C)
–50
PFI INPUT THRESHOLD (V)
1.310
1.308
1.306
1.304
1.302
1.300
1.298
1.296
1.294
25 75
694/5-3.3 G03
–25 0
50 100 125
V
CC
= 3.3V
TIME (µs)
0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
4
694/5-3.3 G04
123
5
1.305V
1.285V
87
6
V
CC
= 3.3V
T
A
= 25°C
V
PFI
= 20mV STEP
PFO OUTPUT VOLTAGE (V)
9
+
–
V
PFI
1.3V
30pF
PFO
TIME (µs)
0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
4
694/5-3.3 G06
2
6
1.315V
1.295V
12
108
V
PFI
= 20mV STEP
1816
14
PFO OUTPUT VOLTAGE (V)
V
CC
= 3.3V
T
A
= 25°C
+
–
V
PFI
1.3V
30pF
10k
3.3V
PFO
TIME (µs)
0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
40
694/5-3.3 G05
20
60
1.315V
1.295V
120
10080
V
PFI
= 20mV STEP
180160
140
PFO OUTPUT VOLTAGE (V)
V
CC
= 3.3V
T
A
= 25°C
+
–
V
PFI
1.3V
30pF
PFO
TEMPERATURE (°C)
–50
RESET ACTIVE TIME (ms)
25 75
694/5-3.3 G07
–25 0
50 100 125
220
210
200
190
180
170
160
150
V
CC
= 3.3V
TEMPERATURE (°C)
–50
RESET VOLTAGE THRESHOLD (V)
2.90
2.89
2.88
2.87
2.86
2.85
2.84
25 75
694/5-3.3 G08
–25 0
50 100 125
V
CC
= 3.3V
SUPPLY VOLTAGE (V)
0
RESET OUTPUT VOLTAGE (V)
3
4
5
4
2
1
0
1
2
3
5
694/5-3.3 G09