LTC6991
6
6991fb
Supply Current vs RSET
RST Threshold Voltage
vs Supply Voltage
Typical ISET Current Limit vs V+
Supply Current vs Supply Voltage
Supply Current vs Temperature
Supply Current
vs RST Pin Voltage
Reset Propagation Delay (tRST)
vs Supply Voltage
Rise and Fall Time
vs Supply Voltage
TYPICAL PERFORMANCE CHARACTERISTICS
V+ = 3.3V, RSET = 200k, TA = 25°C unless otherwise noted.
SUPPLY VOLTAGE (V)
2
0
POWER
SUPPL
Y
CURRENT
(μA)
25
50
75
100
125
150
34
5
6
6991 G10
RSET = 50k
RSET = 100k
RSET = 200k
RSET = 800k
TEMPERATURE (°C)
–50
POWER
SUPPLY
CURRENT
(μA)
100
125
150
25
75
6991 G11
75
50
–25
0
50
100
125
25
0
5V, RSET = 100k
2.5V, RSET = 100k
2.5V, RSET = 800k
5V, RSET = 800k
VRST/V
+ (V/V)
0
POWER
SUPPL
Y
CURRENT
(μA)
150
200
250
0.8
6991 G12
100
50
0
0.2
0.4
0.6
1.0
5V
RST FALLING
5V
RST RISING
3.3V
RST FALLING
3.3V
RST RISING
RSET = 800k
RSET (kΩ)
0
POWER
SUPPL
Y
CURRENT
(μA)
25
50
75
100
125
150
200
400
600
800
6991 G13
V+ = 5V
V+ = 3.3V
V+ = 2.5V
SUPPLY VOLTAGE (V)
I SET
(μA)
6991 G15
1000
400
800
200
600
0
24
35
6
SET PIN SHORTED TO GND
SUPPLY VOLTAGE (V)
RST
PIN
VOL
TAGE
(V)
6991 G14
3.5
1.0
2.0
3.0
0.5
1.5
2.5
0
24
35
6
POSITIVE-GOING
NEGATIVE-GOING
SUPPLY VOLTAGE (V)
2
0
PROPAGATION
DELAY
(ns)
5
15
20
25
50
35
3
4
6991 G16
10
40
45
30
5
6
CLOAD = 5pF
SUPPLY VOLTAGE (V)
RISE/F
ALL
TIME
(ns)
6991 G17
3.0
1.5
2.5
1.0
0.5
2.0
0
24
35
6
CLOAD = 5pF
tRISE
tFALL
Typical Frequency Error
vs Time (Long-Term Drift)
TIME (h)
DEL
TA
FREQUENCY
(ppm)
6991 G17a
50
0
150
–150
–100
–50
100
200
–200
0
1200
400
800
1600 2000 2400 2800
65 UNITS
SOT-23 AND DFN PARTS
TA = 30°C