LTC3544_15 Datasheet, PDF (6/16 Pages) Linear Technology – Quad Synchronous Step-Down Regulator

LTC3544
TYPICAL PERFORMANCE CHARACTERISTICS
Load Step Response
100mA Channel
Load Step Crosstalk
V_OUT100
50mV/DIV
AC COUPLED
I_L
100mA/DIV
I_LOAD
100mA/DIV
V_IN = 3.6V
20μs/DIV
V_OUT = 1.2V
T_A = 25°C
I_LOAD = 400μA TO 100mA
3544 G16
V_OUT100
1mV/DIV
V_OUT200A
1mV/DIV
V_OUT200B
1mV/DIV
V_OUT300
50mV/DIV
V_IN = 3.6V
40μs/DIV
3544 G17
T_A = 25°C
300mA LOAD STEP ON V_OUT300
OTHER CHANNELS LOADED 50% OF MAXIMUM
PFET R_DS(ON) vs Supply Voltage
1.2
T_A = 25°C
1.0
0.8
0.6
0.4
300
0.2
200B
200A
100
0
2 2.5 3 3.5 4 4.5 5 5.5 6
V_IN (V)
3544 G16
NFET R_DS(ON) vs Supply Voltage
1.0
T_A = 25°C
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
2
300
200B
200A
100
3
4
5
6
V_IN (V)
3544 G17
PFET R_DS(ON) vs Temperature
1.0
V_IN = 3.6V
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–50 –30
–10 10 30 50
TEMPERATURE (°C)
300
200B
200A
100
70 90
3544 G18
NFET R_DS(ON) vs Temperature
1.0
V_IN = 3.6V
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
– 50
0
50
TEMPERATURE (°C)
300
200B
200A
100
100
3544 G19
6
3544fa