Datasheet

LTC4252B-1/LTC4252B-2
LTC4252C-1/LTC4252C-2
5
4252b12f
TYPICAL PERFORMANCE CHARACTERISTICS
I
IN
vs V
IN
Undervoltage Lockout V
LKO
vs Temperature
Undervoltage Lockout Hysteresis
V
LKH
vs Temperature
Circuit Breaker Current Limit
Voltage V
CB
vs Temperature
Analog Current Limit Voltage
V
ACL
vs Temperature
Fast Current Limit Voltage V
FCL
vs Temperature
V
Z
vs Temperature r
Z
vs Temperature I
IN
vs Temperature
TEMPERATURE (°C)
–55
V
Z
(V)
14.5
14.0
13.5
13.0
12.5
12.0
–15
25
45 125
4252B12 G01
–35 5
65
85
105
I
IN
= 2mA
TEMPERATURE (°C)
–55
r
Z
(Ω)
10
9
8
7
6
5
4
3
2
–15
25
45 125
4252B12 G02
–35 5
65
85
105
I
IN
= 2mA
TEMPERATURE (°C)
–55
I
IN
(µA)
2000
1800
1600
1400
1200
1000
800
600
400
200
0
–15
25
45 125
4252B12 G03
–35 5
65
85
105
V
IN
= (V
Z
– 0.3V)
V
IN
(V)
0 2 4 6 8 10 12 14 16 18 20 22
I
IN
(mA)
1000
100
10
1
0.1
4252B12 G04
125°C
85°C
25°C
–40°C
TEMPERATURE (°C)
–55
V
LKO
(V)
12.0
11.5
11.0
10.5
10.0
9.5
9.0
8.5
8.0
–15
25
45 125
4252B12 G05
–35 5
65
85
105
TEMPERATURE (°C)
–55
0.5
V
LKH
(V)
0.7
1.1
1.3
1.5
–15
25
45 125
4252B12 G06
0.9
–35 5
65
95
105
TEMPERATURE (°C)
–55
V
CB
(mV)
60
58
56
54
52
50
48
46
44
42
40
–15
25
45 125
4252B12 G07
–35 5
65
85
105
TEMPERATURE (°C)
–55
V
ACL
(mV)
120
115
110
105
100
95
90
85
80
–15
25
45 125
4252B12 G08
–35 5
65
85
105
TEMPERATURE (°C)
–55
V
FCL
(mV)
300
275
250
225
200
175
150
–15
25
45 125
4252B12 G09
–35 5
65
85
105