Datasheet

LT4254
5
4254fb
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TIMER Shutdown Threshold
vs Temperature
TIMER Pin Pull-Up Current vs V
CC
UV Threshold Voltage (High-to-
Low) vs Temperature
TIMER Pin Pull-Up Current
vs Temperature
UV Hysteresis vs Temperature
TEMPERATURE (°C)
–50 –25
–150
–130
–140
TIMER PULL-UP CURRENT (µA)
–110
–80
0
50
75
4254 G13
–120
–90
–100
25
100
125
TIMER Pin Pull-Down Current
vs Temperature
TEMPERATURE (°C)
–50
TIMER PULL-DOWN CURRENT (µA)
3.5
25
4254 G14
2.0
1.0
–25 0 50
0.5
0
4.0
3.0
2.5
1.5
75 100 125
TIMER Pin Pull-Down Current
vs V
CC
TEMPERATURE (°C)
–50 –25
4.0
TIMER SHUTDOWN THRESHOLD VOLTAGE (V)
4.4
5.0
0
50
75
4254 G16
4.2
4.8
4.6
25
100
125
TEMPERATURE (°C)
–50
UV THRESHOLD VOLTAGE HIGH-TO-LOW (V)
3.65
25
4254 G18
3.62
3.60
–25 0 50
3.59
3.58
3.66
3.64
3.63
3.61
75 100 125
UV Threshold Voltage (Low-to-
High) vs Temperature
TEMPERATURE (°C)
–50
UV THRESHOLD VOLTAGE LOW-TO-HIGH (V)
4.00
4.01
4.02
25 75
4254 G19
3.99
3.98
–25 0
50 100 125
3.97
3.96
TEMPERATURE (°C)
–50
UV HYSTERESIS (mV)
400
450
500
25 75
4254 G20
350
300
–25 0
50 100 125
250
200
OV Threshold Voltage (Low-to-
High) vs Temperature
TEMPERATURE (°C)
–50
OV THRESHOLD VOLTAGE (LOW-TO-HIGH) (V)
4.00
4.01
4.02
25 75
4257 G21
3.99
3.98
–25 0
50 100 125
3.97
3.96
V
CC
(V)
T
A
= 25°C
10
–126
TIMER PULL-UP CURRENT (µA)
–124
–122
–120
–118
–116
15
20 25 30
4254 G17
35 40
V
CC
(V)
10
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
25 35
15 20
30 40
TIMER PULL-DOWN CURRENT (µA)
T
A
= 25°C