Datasheet

LTC1644
6
1644f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
12V Foldback Current Limit
vs Temperature
V
EE
Foldback Current Limit
vs Temperature
12V
OUT
PWRGD Threshold
Voltage vs Temperature
V
EEOUT
PWRGD Threshold Voltage
vs Temperature
5V
OUT
PWRGD Threshold Voltage
vs Temperature
3V
OUT
PWRGD Threshold Voltage
vs Temperature
3V Only Window Voltage
vs Temperature
No V
EEIN
Threshold Voltage vs
Temperature
5V
SENSE
Input Current vs
Temperature
TEMPERATURE (°C)
–50
0
12V FOLDBACK CURRENT LIMIT (A)
0.10
0.30
0.40
0.50
50
1.00
0.90
1644 G19
0.20
0
–25
75
25 100
0.60
0.70
0.80
12V
OUT
= 10V
12V
OUT
= 0V
TEMPERATURE (°C)
–50
0
V
EE
FOLDBACK CURRENT LIMIT (A)
0.05
0.15
0.20
0.25
50
0.45
1644 G20
0.10
0
–25
75
25 100
0.30
0.35
0.40
V
EEOUT
= –10V
V
EEOUT
= 0V
TEMPERATURE (°C)
–60
12V
OUT
PWRGD THRESHOLD VOLTAGE (V)
11.05
11.06
11.07
11.09
11.10
11.08
–40 –20 0 20
1644 G21
40 100
11.11
60 80
TEMPERATURE (°C)
–50
V
EEOUT
PWRGD THRESHOLD VOLTAGE (V)
25
75
1644 G22
–25 0 50
–10.46
–10.47
–10.48
–10.49
–10.50
–10.51
–10.52
–10.53
–10.54
100
TEMPERATURE (
°C)
–50
4.610
5V
OUT
PWRGD THRESHOLD VOLTAGE (V)
–25 0 25 50
1644 G23
75 100
4.618
4.616
4.614
4.612
4.620
4.622
TEMPERATURE (°C)
–50
3V
OUT
PWRGD THRESHOLD VOLTAGE (V)
–25 0 25 50
1644 G24
75 100
2.905
2.903
2.901
2.899
2.897
2.895
TEMPERATURE (°C)
–50
3V ONLY WINDOW VOLTAGE (V)
0.09
0.10
0.11
25
75
1644 G25
0.08
0.07
0.06
–25 0 50
0.12
0.13
0.14
100
5V
IN
– 3V
IN
3V
IN
– 5V
IN
TEMPERATURE (°C)
–50
–4.20
–4.30
–4.40
–4.50
–4.60
–4.70
–4.80
–4.90
25 75
1644 G26
–25 0
50 100
V
EEIN
THRESHOLD VOLTAGE (V)
TEMPERATURE (°C)
–50
60
50
40
30
20
10
0
25 75
1644 G27
–25 0
50 100
5V
SENSE
INPUT CURRENT (µA)
5V
OUT
= 0V
5V
OUT
= 3V