LTC3615 Datasheet, PDF (8/32 Pages) Linear Technology – Dual 4MHz, 3A Synchronous Step-Down DC/DC Converter

LTC3615
Typical Performance Characteristics V_IN = 3.3V, R_T/SYNC = SV_IN, unless otherwise noted.
Switch Leakage vs Temperature
2.0
V_IN = 5.5V
1.8
1.6
1.4
1.2
1.0
MAIN SWITCH
0.8
0.6
0.4
0.2
SYNCHRONOUS SWITCH
0
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
3615 G25
No Load Supply Current
vs Input Voltage
180
MODE = 0V
160 RUNx = ITHx = SV_IN
140
120
100
80
60
40
20
0
2.25 2.75 3.25 3.75 4.25 4.75 5.25
V_IN (V)
3615 G26
No Load Supply Current
vs Temperature
180
MODE = 0V
160 RUNx = ITHx = SV_IN
140
120
100
80
60
40
20
0
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
3615 G27
Slew Rate of Falling Edge at
SW1/2 vs SRLIM Resistor
V_IN = 3.3V
V_OUT = 1.8V
I_OUT = 1A
SRLIM =
SGND OR SV_IN
100k
40.2k
1V/DIV
OPEN
Slew Rate of Rising Edge at
SW1/2 vs SRLIM Resistor
V_IN = 3.3V
V_OUT = 1.8V
I_OUT = 1A
SRLIM =
SGND OR SV_IN
1V/DIV
40.2k
100k
OPEN
Sinking Current
V_OUT
20mV/DIV
SW
2V/DIV
I_L
500mA/DIV
V_OUT = 1.2V
I_OUT = –1A
V_MODE = 1.5V
1µs/DIV
3615 G30
2ns/DIV
3615 G28
2ns/DIV
3615 G29
Tracking Up/Down in
Forced Continuous Mode,
SRLIM Pin Tied to 0V
V_OUT1
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_SRLIM = 0V
3615 G31
Tracking Up/Down in
Forced Continuous Mode,
SRLIM Pin Tied to SV_IN
V_OUT1
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_SRLIM = 3.3V
3615 G32
3615f