LTC3560_15 Datasheet, PDF (5/16 Pages) Linear Technology – 2.25MHz, 800mA Synchronous Step-Down Regulator in ThinSOT

TYPICAL PERFORMANCE CHARACTERISTICS
(From Figure 1a Except for the Resistive Divider Resistor Values)
Dynamic Supply Current
vs Temperature
300
V_IN = 3.6V
V_OUT = 1.2V
250 _{ILOAD = 0A}
200
PULSE SKIPPING MODE
150
100
50
Burst Mode OPERATION
Switch Leakage vs Temperature
140
120
100
80
MAIN SWITCH
60
40
SYNCHRONOUS
SWITCH
20
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3560 G13
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3560 G14
LTC3560
Switch Leakage vs Input Voltage
1000
RUN = 0V
900
800
700
600
500
MAIN SWITCH
400
300
200
SYNCHRONOUS
SWITCH
100
0
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
3560 G15
Burst Mode Operation
SW
2V/DIV
V_OUT
20mV/DIV
AC COUPLED
I_L
200mA/DIV
V_IN = 3.6V
V_OUT = 1.8V
I_LOAD = 25mA
2μs/DIV
Pulse-Skipping Mode Operation
Start-Up from Shutdown
SW
2V/DIV
V_OUT
20mV/DIV
AC COUPLED
I_L
200mA/DIV
3560 G16
V_IN = 3.6V
V_OUT = 1.8V
I_LOAD = 25mA
500ns/DIV
RUN
2V/DIV
V_OUT
1V/DIV
I_L
500mA/DIV
3560 G17
V_IN = 3.6V
500µs/DIV
V_OUT = 1.8V
I_LOAD = 800mA
3560 G18
Load Step
V_OUT
200mV/DIV
AC COUPLED
I_L
1A/DIV
I_LOAD
1A/DIV
V_IN = 3.6V
20μs/DIV
V_OUT = 1.8V
I_LOAD = 0A TO 800mA
PULSE SKIPPING MODE
Load Step
V_OUT
200mV/DIV
AC COUPLED
I_L
1A/DIV
I_LOAD
1A/DIV
3560 G19
V_IN = 3.6V
20μs/DIV
V_OUT = 1.8V
I_LOAD = 50mA TO 800mA
PULSE SKIPPING MODE
Load Step
V_OUT
200mV/DIV
AC COUPLED
I_L
1A/DIV
I_LOAD
1A/DIV
3560 G20
V_IN = 3.6V
20µs/DIV
V_OUT = 1.8V
I_LOAD = 100mA TO 800mA
PULSE SKIPPING MODE
3560 G21
3560fb
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