Datasheet

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