Datasheet

LTC3729
7
3729fb
TYPICAL PERFORMANCE CHARACTERISTICS
Current Sense Pin Input Current
vs Temperature
EXTV
CC
Switch Resistance
vs Temperature
Oscillator Frequency
vs Temperature
Soft-Start Up (Figure 12) Load Step (Figure 12)
Undervoltage Lockout
vs Temperature
Shutdown Latch Thresholds
vs Temperature
3729 G20
V
OUT
2V/DIV
V
ITH
1V/DIV
V
RUNSS
2V/DIV
100ms/DIV
3729 G21
V
ITH
1V/DIV
I
OUT
0/30A
V
OUT
200mV/DIV
10µs/DIV
TEMPERATURE (°C)
–50 –25
25
CURRENT SENSE INPUT CURRENT (µA)
29
35
0
50
75
3729 G23
27
33
31
25
100
125
V
OUT
= 5V
TEMPERATURE (°C)
–50 –25
0
EXTV
CC
SWITCH RESISTANCE (Ω)
4
10
0
50
75
3729 G24
2
8
6
25
100
125
TEMPERATURE (°C)
–50
400
500
700
25 75
3729 G25
300
200
–25 0
50 100 125
100
0
600
FREQUENCY (kHz)
V
PLLFLTR
= 2.4V
V
PLLFLTR
= 1.2V
V
PLLFLTR
= 0V
TEMPERATURE (°C)
–50
UNDERVOLTAGE LOCKOUT (V)
3.40
3.45
3.50
25 75
3729 G26
3.35
3.30
–25 0
50 100 125
3.25
3.20
TEMPERATURE (°C)
–50 –25
0
SHUTDOWN LATCH THRESHOLDS (V)
0.5
1.5
2.0
2.5
75 10050
4.5
3729 G27
1.0
0 25 125
3.0
3.5
4.0
LATCH ARMING
LATCHOFF
THRESHOLD