LTC3612_15 Datasheet, PDF (7/30 Pages) Linear Technology – 3A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter

LTC3612
Typical Performance Characteristics V_IN = 3.3V, RT/SYNC = SV_IN, unless otherwise noted.
Internal Start-Up in Forced
Continuous Mode
Tracking Up/Down in
Forced Continuous Mode,
DDR Pin Tied to 0V
RUN
1V/DIV
V_OUT
500mV/DIV
I_L
1A/DIV
PGOOD
2V/DIV
V_OUT = 1.8V
I_OUT = 3A
V_MODE = 1.5V
500µs/DIV
3612 G17
V_OUT
1V/DIV
V_TRACK/SS
500mV/DIV
PGOOD
2V/DIV
2ms/DIV
V_OUT = 0V TO 1.8V
I_OUT = 3A
V_TRACK/SS = 0V TO 0.7V
V_MODE = 1.5V
V_DDR = 0V
3612 G18
Tracking Up/Down in Forced
Continuous Mode, DDR Pin Tied
to SV_IN
V_OUT
500mV/DIV
V_TRACK/SS
200mV/DIV
PGOOD
2V/DIV
2ms/DIV
V_OUT = 0V TO 1.2V
I_OUT = 3A
V_TRACK/SS = 0V TO 0.4V
V_MODE = 1.5V
V_DDR = 3.3V
3612 G19
Switch On-Resistance
vs Input Voltage
0.10
0.09
0.08
0.07
MAIN SWITCH
0.06
0.05
SYNCHRONOUS SWITCH
0.04
0.03
0.02
0.01
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
3612 G21
Reference Voltage
vs Temperature
0.606
0.604
0.602
0.600
0.598
0.596
0.594
–60 –50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
3612 G20
Switch On-Resistance
vs Temperature
0.10
0.09
0.08
MAIN SWITCH
0.07
0.06
0.05
0.04
SYNCHRONOUS SWITCH
0.03
0.02
0.01
0
–60 –50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
3612 G22
For more information www.linear.com/LTC3612
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