Datasheet

LTC3600
7
3600fc
Typical perForMance characTerisTics
Efficiency vs Load Current
V
OUT
= 3.3V, V
IN
= 12V
Rising RUN Threshold vs
Temperature
Start-Up Waveform
TEMPERATURE (°C)
–60 –40
RUN THRESHOLD (V)
1.45
1.60
–20
1.50
1.55
1.40
20
14060 80 100 12040
0
3600 G18
Efficiency vs Load Current
V
OUT
= 1.2V, V
IN
= 12V
LOAD CURRENT (A)
EFFICIENCY (%)
0.001 0.1 1 100.01
3600 G19
CCM
DCM
40
50
60
70
80
30
20
10
0
90
100
LOAD CURRENT (A)
EFFICIENCY (%)
0.001 0.1 1 100.01
3600 G20
CCM
DCM
40
50
60
70
80
30
20
10
0
90
100
Start-Up Waveform Start-Up Waveform
Start-Up Waveform V
IN
Overvoltage
20ms/DIV
V
IN
5V/DIV
V
OUT
1V/DIV
SW
10V/DIV
3600 G25
V
IN
= 12V TO 18V TO 12V
V
OUT
= 3.3V
I
OUT
= 1A
V
IN
RESISTOR = 30Ω
MODE = CCM
1ms/DIV
RUN
5V/DIV
V
OUT
2V/DIV
I
L
3600 G21
MODE = CCM
NO PREBIASED V
OUT
V
IN
= 12V
V
OUT
= 3.3V
1ms/DIV
RUN
5V/DIV
V
OUT
2V/DIV
I
L
1A/DIV
3600 G22
MODE = DCM
NO PREBIASED V
OUT
V
IN
= 12V
V
OUT
= 3.3V
1ms/DIV
RUN
5V/DIV
V
OUT
2V/DIV
I
L
1A/DIV
3600 G23
MODE = CCM
V
OUT
IS PREBIASED TO 2V
V
IN
= 12V
V
OUT
= 3.3V
1ms/DIV
RUN
5V/DIV
V
OUT
2V/DIV
I
L
1A/DIV
3600 G24
MODE = DCM
V
OUT
IS PREBIASED TO 2V
V
IN
= 12V
V
OUT
= 3.3V