LTC4268-1
6
42681fc
INPUT VOLTAGE (V)
0
0
0.1
0.2
0.3
0.4
0.5
2
4
6
8
42681 G01
10
T
A
 = 25癈
INPUT VOLTAGE (V)
0
0
20
40
60
80
100
10    20    30
*OPTIONAL CLASS 5 CURRENT
40
42681 G02
50    60
T
A
 = 25癈
CLASS 5*
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
INPUT VOLTAGE (V)
12
9.0
9.5
10.5
11.0
11.5
14
16
42681 G03
10.0
18
20
22
12.0
85癈
40癈
CLASS 1 OPERATION
INPUT VOLTAGE (V)
1
22
V1:
V2:
23
25
26
27
3
5
42681 G04
24
7
9
6
10
2
4
8
28
RESISTANCE =
DIODES: DF1501S
T
A
 = 25癈
=
V
I
V2  V1
I
2
  I
1
IEEE UPPER LIMIT
IEEE LOWER LIMIT
LTC4268-1 + 2 DIODES
LTC4268-1 ONLY
INPUT
VOLTAGE
10V/DIV
CLASS
CURRENT
20mA/DIV
TIME (10祍/DIV)
42681 G05
T
A
 = 25癈
JUNCTION TEMPERATURE (癈)
50
0
0.2
0.4
0.6
0.8
1.0
25
0
25
50
42681 G06
75    100
INPUT CURRENT (mA)
0
2
3
8
42681 G07
1
0
2
4
6
10
4
T
A
 = 25癈
INPUT CURRENT (mA)
0
0
0.4
1.0
0.5
1
0.2
0.8
0.6
1.5
2
T
A
 = 25癈
GND  V
NEG
 = 4V
INPUT VOLTAGE (V)
40
200
400
600
800
40癈
40癈
85癈
85癈
45
50
55
60
HIGH CURRENT MODE
LOW CURRENT MODE
Typical perForMance characTerisTics
Input Current vs Input Voltage
25k Detection Range
 
Input Current vs Input Voltage
 
Input Current vs Input Voltage
Signature Resistance
vs Input Voltage
 
Class Operation vs Time
 
On Resistance vs Temperature
Active Low PWRGD: Output Low
Voltage vs Current
Active High PWRGD: Output Low
Voltage vs Current
 
Current Limit vs Input Voltage
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