LTC6991 Linear Technology, LTC6991 Datasheet - Page 6

• Manufacturer Part Number: LTC6991
• Description: Resettable Low Frequency Oscillator
• Manufacturer: Linear Technology

DataSheet.in
LTC6991
Typical perForMance characTerisTics
V

+
= 3.3V, R
150
125
100
150
125
100
75
50
25
75
50
25
0
0
2
0
Supply Current vs Supply Voltage
Supply Current vs R
V
SET
+
= 5V
200
= 200k, T
3
SUPPLY VOLTAGE (V)
R
R
SET
SET
R
= 100k
= 50k
30
SET
50
45
40
35
25
20
15
10
0
5
400
4
2
A
Reset Propagation Delay (t
vs Supply Voltage
(k )
C
V
V
= 25°C unless otherwise noted.
LOAD
+
R
R
+
SET
= 2.5V
SET
SET
= 3.3V
= 5pF
= 200k
= 800k
600
5
3
SUPPLY VOLTAGE (V)
6991 G10
6991 G13
800
6
4
1000
150
125
800
600
400
200
100
5
75
50
25
0
0
RST
–50
2
Typical I
Supply Current vs Temperature
SET PIN SHORTED TO GND
)
6991 G16
–25
6
3
SET
0
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
2.5V, R
2.5V, R
5V, R
5V, R
Current Limit vs V
25
SET
SET
SET
SET
4
= 100k
= 800k
50
= 100k
= 800k
75
5
3.0
2.5
2.0
1.5
1.0
0.5
0
100
2
Rise and Fall Time
vs Supply Voltage
+
C
6991 G11
6991 G15
LOAD
125
6
= 5pF
3
SUPPLY VOLTAGE (V)
t
FALL
t
RISE
250
200
100
150
3.5
3.0
2.5
2.0
1.5
1.0
0.5
50
0
0
0
2
4
Supply Current
vs RST Pin Voltage
RST Threshold Voltage
vs Supply Voltage
R
RST FALLING
SET
= 800k
RST FALLING
0.2
POSITIVE-GOING
3.3V
3
5
SUPPLY VOLTAGE (V)
V
5V
0.4
RST
6991 G17
/V
4
6
+
(V/V)
0.6
NEGATIVE-GOING
5V
RST RISING
3.3V
RST RISING
5
0.8
6991 G12
6991 G14
6991p
1.0
6