LTC2901 Linear Technology, LTC2901 Datasheet - Page 7

• Manufacturer Part Number: LTC2901
• Description: Programmable Quad Supply Monitor with Adjustable Reset and Watchdog Timers
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
100m
10m
250
200
150
100
100
3.0
2.5
2.0
1.5
1.0
0.5
1m
50
10
1
0
0
10p
10
0
Watchdog Time-Out Period
vs Capacitance
RST, WDO, COMPX Voltage
Output Low vs Output Sink Current
COMPX Propagation Delay vs Input
Overdrive Above Threshold
INPUT OVERDRIVE ABOVE THRESHOLD (mV)
T
V2 = 3V
V1 = 5V
A
= 25 C
10
100p
20
30
C
1n
I
WT
SINK
85 C
40
100
(FARAD)
V1, V2
V3, V4
(mA)
50
10n
60
W
100n
25 C
70
T
A
– 40 C
= 25 C
80
2901 G25
2901 G17
2901 G20
U
1000
1
90
100m
100
10m
1m
3.5
3.0
2.5
2.0
1.5
1.0
0.5
20
18
16
14
12
10
10
8
6
4
2
0
1
0
10p
0
2
RST High Level Output Voltage
vs Output Source Current
(LTC2901-2)
Reset Time-Out Period
vs Capacitance
RST Pull-Up Current vs V2
(LTC2901-1)
T
T
V
A
A
RT25
= 25 C
= 25 C
2.5
100p
V
0.5
RT30
V
RT33
3
I
C
SOURCE
1n
1
RT
85 C
V2 (V)
(FARAD)
3.5
(mA)
10n
1.5
25 C
4
– 40 C
100n
V1 = 5V
V2 = 3V
V3 = 2.5V
V4 = 1V
2
4.5
2901 G18
2901 G26
2901 G21
2.5
1
5
12
10
20
18
16
14
10
0
6
5
4
3
0
9
8
7
6
5
4
3
2
1
0
8
6
4
2
2
1
1
2
0
COMPX and WDO Pull-Up
Current vs V2 (COMPX and
WDO Held at 0V)
RST Pull-Up Current vs V2
(LTC2901-2)
RST, WDO, COMPX I
vs Supply Voltage
T
T
T
V
A
A
A
RT25
= 25 C
= 25 C
= 25 C
1.5
2.5
V
1
RT30
2
V
RT33
2
3
2.5
V1 OR V2 (V)
V2 (V)
V2 (V)
3.5
3
3
LTC2901
V
3.5
SINK
OL
4
V
4
= 0.2V
OL
4
2901is sn2901
= 0.4V
4.5
5
4.5
2901 G24
2901 G27
2901 G19
7
5
6
5