LTC3729_15 Datasheet, PDF (7/30 Pages) Linear Technology – 550kHz, PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3729
Soft-Start Up (Figure 12)
V_ITH
1V/DIV
V_OUT
2V/DIV
V_RUNSS
2V/DIV
Load Step (Figure 12)
I_OUT
0/30A
V_ITH
1V/DIV
V_OUT
200mV/DIV
100ms/DIV
3729 G20
10µs/DIV
3729 G21
Current Sense Pin Input Current
vs Temperature
35
V_OUT = 5V
33
31
EXTV_CC Switch Resistance
vs Temperature
10
8
6
Oscillator Frequency
vs Temperature
700
600
V_PLLFLTR = 2.4V
500
V_PLLFLTR = 1.2V
400
29
4
300
V_PLLFLTR = 0V
200
27
2
100
25
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3729 G23
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3729 G24
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3729 G25
Undervoltage Lockout
vs Temperature
3.50
3.45
3.40
3.35
3.30
3.25
3.20
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3729 G26
Shutdown Latch Thresholds
vs Temperature
4.5
4.0
LATCH ARMING
3.5
3.0
LATCHOFF
THRESHOLD
2.5
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3729 G27
3729fb
7