LTC690 Linear Technology, LTC690 Datasheet - Page 7

• Manufacturer Part Number: LTC690
• Description: Microprocessor Supervisory Circuits
• Manufacturer: Linear Technology

TYPICAL PERFOR
1.305V
1.285V
5.00
4.95
4.85
4.80
4.75
4.90
58
56
54
52
50
48
46
6
5
4
2
0
– 50
3
1
0
V
Reset Active Time
vs Temperature LTC690-1
Power-Fail Comparator
Response Time
OUT
V
CC
–25
0
= 5V
vs I
10
1
V
OUT
LOAD CURRENT (mA)
0
PFI
TEMPERATURE ( C)
2
= 20mV STEP
20
25
3
TIME ( s)
1.3V
V
PFI
4
50
SLOPE = 5
30
+
–
5
PFO
75
V
V
T
6
A
CC
BATT
W
V
T
= 25 C
40
A
= 5V
CC
7
100
= 25 C
= 2.8V
= 5V
30pF
A
690 G01
690 G04
690 G07
8
U
125
50
CE
1.315V
1.295V
C
2.74
2.72
2.80
2.78
2.76
232
224
216
208
200
192
184
HARA TERISTICS
6
5
4
2
0
3
1
– 50
0
V
Reset Active Time
vs Temperature LTC694-5
Power-Fail Comparator
Response Time
V
T
OUT
V
A
CC
CC
0
–25
= 25 C
= 5V
= 5V
vs I
100
20
C
V
OUT
PFI
40
0
LOAD CURRENT ( A)
TEMPERATURE ( C)
= 20mV STEP
200
60
25
TIME ( s)
V
1.3V
PFI
80
50
SLOPE = 125
100
300
+
–
PFO
120
75
V
V
T
CC
BATT
A
= 25 C
400
140
= 0V
100
= 2.8V
30pF
160
690 G05
690 G08
690 G02
500
125
180
1.315V
1.295V
1.308
1.300
1.296
1.306
1.304
1.302
1.298
1.294
4.66
4.65
4.64
4.63
4.62
4.60
4.61
6
5
4
2
0
3
1
– 50
– 50
Power Failure Input Threshold
vs Temperature
Reset Voltage Threshold
vs Temperature
Power-Fail Comparator Response
Time with Pull-Up Resistor
V
V
T
CC
A
CC
LTC694/LTC695
0
LTC690/LTC691
–25
–25
= 25
= 5V
= 5V
2
˚
C
V
PFI
0
0
4
TEMPERATURE ( C)
TEMPERATURE ( C)
= 20mV STEP
6
TIME ( s)
25
25
V
1.3V
PFI
8
50
50
10
+
–
PFO
12
75
75
14
5V
100
100
10k
30pF
16
690 G09
690 G03
690 G06
7
125
125
18