Datasheet

LTC2909
4
2909fb
ADJ Threshold Voltage
vs Temperature
V
CC
UVLO Threshold Variation
vs Temperature
REF Output Voltage
vs Temperature
REF Output Load Regulation
Quiescent Supply Current
vs Temperature
Allowable Glitch Duration
vs Magnitude
External Timeout Period
vs Capacitance
Reset Timeout Period
vs Temperature
TYPICAL PERFOR A CE CHARACTERISTICS
UW
T
A
= 25°C unless otherwise noted
TEMPERATURE (°C)
–50
THRESHOLD VOLTAGE, V
RT
(mV)
506
25
2909 G01
500
496
–25 0 50
494
492
508
504
502
498
75 100 125
TEMPERATURE (°C)
–50
THRESHOLD VOLTAGE VARIATION (% OF 25°C VALUE)
0.5
1.0
1.5
25 75
2909 G02
0
–0.5
–25 0
50 100 125
–1.0
–1.5
TEMPERATURE (°C)
–50
REF VOLTAGE, V
REF
(V)
1.005
1.010
0.015
25 75
2909 G03
1.000
0.995
–25 0
50 100 125
0.990
0.985
I
REF
= 0A
LOAD CURRENT, I
REF
(mA)
–1
0.985
REF VOLTAGE, V
REF
(V)
0.990
0.995
1.000
1.005
1.010
1.015
V
CC
= 2.5V
–0.5 0 0.5 1
2909 G04
T
A
= 125°C
T
A
= 25°C
T
A
= –40°C
REF Output Line Regulation
SUPPLY VOLTAGE, V
CC
(V)
2
0.985
REF VOLTAGE, V
REF
(V)
0.990
0.995
1.000
1.005
34
5
6
2909 G05
1.010
1.015
2.5 3.5
4.5
5.5
T
A
= 125°C
I
REF
= 0A
T
A
= 25°C
T
A
= –40°C
GLITCH PERCENTAGE PAST THRESHOLD (%)
0.1
400
MAXIMUM ALLOWABLE
GLITCH DURATION (μs)
500
600
700
1 10 100
2909 G07
300
200
100
0
RESET OCCURS
ABOVE CURVE
TMR PIN CAPACITANCE, C
TMR
(nF)
10
RESET TIMEOUT PERIOD, t
RST
(ms)
100
1000
10000
0.1 10 100 1000
2909 G08
1
1
TEMPERATURE (°C)
–50
RESET TIMEOUT PERIOD, t
RST
(ms)
220
240
260
25 75
2909 G09
200
180
–25 0
50 100 125
160
140
INTERNAL
EXTERNAL WITH
22nF CAPACITOR
TEMPERATURE (°C)
–50
QUIESCENT SUPPLY CURRENT, I
CC
(μA)
55
25
2909 G06
40
30
–25 0 50
25
20
60
50
45
35
75 100 125
ADJ1 = 0.55V
ADJ2 = 0.45V
SEL = OPEN
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 2.5V