Datasheet
LTC3612
7
3612fb
For more information www.linear.com/LTC3612
Internal Start-Up in Forced
Continuous Mode
Tracking Up/Down in
Forced Continuous Mode,
DDR Pin Tied to 0V
Tracking Up/Down in Forced
Continuous Mode, DDR Pin Tied
to SV
IN
Reference Voltage
vs Temperature
Switch On-Resistance
vs Input Voltage
V
OUT
500mV/DIV
RUN
1V/DIV
I
L
1A/DIV
PGOOD
2V/DIV
500µs/DIV
3612 G17
V
OUT
= 1.8V
I
OUT
= 3A
V
MODE
= 1.5V
V
OUT
1V/DIV
V
TRACK/SS
500mV/DIV
PGOOD
2V/DIV
2ms/DIV
3612 G18
V
OUT
= 0V TO 1.8V
I
OUT
= 3A
V
TRACK/SS
= 0V TO 0.7V
V
MODE
= 1.5V
V
DDR
= 0V
V
TRACK/SS
200mV/DIV
V
OUT
500mV/DIV
PGOOD
2V/DIV
2ms/DIV
3612 G19
V
OUT
= 0V TO 1.2V
I
OUT
= 3A
V
TRACK/SS
= 0V TO 0.4V
V
MODE
= 1.5V
V
DDR
= 3.3V
TEMPERATURE (°C)
–60 –50
0.594
REFERENCE VOLTAGE (V)
0.596
0.600
0.602
0.604
–10
30
50 150130
3612 G20
0.598
–30 10
70
90
110
0.606
INPUT VOLTAGE (V)
2.5
R
DS(0N)
(Ω)
0.06
0.08
0.10
4.5
3612 G21
0.04
0.02
0.05
0.07
0.09
0.03
0.01
0
3.0
3.5
4.0
5.0 5.5
MAIN SWITCH
SYNCHRONOUS SWITCH
Switch On-Resistance
vs Temperature
TEMPERATURE (°C)
–60 –50
0
R
DS(ON)
(Ω)
0.01
0.03
0.04
0.05
70
0.10
0.09
3612 G22
0.02
10
–10
110
50
–30
90
30 150130
0.06
0.07
0.08
MAIN SWITCH
SYNCHRONOUS SWITCH
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 3.3V, RT/SYNC = SV
IN
, unless otherwise noted.