LTC1646
U W
TYPICAL PERFOR A CE CHARACTERISTICS
5V Undervoltage Lockout
3V Undervoltage Lockout
5V Foldback Current Limit
IN
IN
IN
Voltage vs Temperature
Voltage vs Temperature
Voltage vs Temperature
2.60
2.55
2.50
2.45
2.40
2.60
2.55
2.50
2.45
2.40
60
50
40
30
20
10
0
LOW-TO-HIGH TRANSITION
5V
= 4V
OUT
HIGH-TO-LOW TRANSITION
LOW-TO-HIGH TRANSITION
HIGH-TO-LOW TRANSITION
5V
= 0V
OUT
–50
–25
0
25
50
75
100
–50
–25
0
25
50
75
100
–50
–25
0
25
50
75
100
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
1646 G04
1646 G05
1646 G06
3V Foldback Current Limit
5V Circuit Breaker Trip Voltage
3V Circuit Breaker Trip Voltage
IN
IN
IN
Voltage vs Temperature
vs Temperature
vs Temperature
60
50
40
30
20
10
0
60
59
58
57
56
55
54
53
52
51
50
60
59
58
57
56
55
54
53
52
51
50
3V
= 2V
OUT
3V
= 0V
OUT
–50
–25
0
25
50
75
100
–50
–25
0
25
50
75
100
–50
–25
0
25
50
75
100
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
1646 G07
1646 G08
1646 G09
5V /3V Overcurrent Fault
5V /3V Short-Circuit Fault
IN IN
Response Time vs Temperature
IN
IN
Response Time vs Temperature
Gate Current vs Temperature
22.00
21.75
21.50
21.25
21.00
20.75
20.50
20.25
20.00
170
160
150
140
130
120
110
100
–10
–11
–12
–13
–14
–15
–50
–25
0
25
50
75
100
–50
–25
0
25
50
75
100
–50
–25
0
25
50
75
100
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
1646 G10
1646 G11
1646 G12
1646fa
4
Linear [ Linear ]
