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