LTC3419 Datasheet, PDF (4/16 Pages) Linear Technology – Dual Monolithic 600mA Synchronous Step-Down Regulator

LTC3419
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C, V_IN = 3.6V, unless otherwise noted.
Burst Mode Operation
SW
2V/DIV
V_OUT
50mV/DIV
AC-COUPLED
I_L
100mA/DIV
V_IN = 3.6V
V_OUT = 1.8V
I_LOAD = 25mA
2μs/DIV
Pulse Skip Mode Operation
SW
2V/DIV
V_OUT
50mV/DIV
AC-COUPLED
I_L
100mA/DIV
3419 G01
V_IN = 3.6V
V_OUT = 1.8V
I_LOAD = 5mA
5μs/DIV
3419 G02
Efficiency vs Input Voltage
100
I_OUT = 100mA
90
80
70 ^{IOUT = 600mA}
I_OUT = 1mA
I_OUT = 10mA
60
50
40
V_OUT = 1.8V
30
2.5 3.0 3.5
I_OUT = 0.1mA
4.0 4.5
V_IN (V)
5.0 5.5
3419 G03
Reference Voltage
vs Temperature
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3419 G04
Oscillator Frequency
vs Temperature
2.6
2.5
2.4
V_IN = 4.2V
2.3
V_IN = 3.6V
2.2
V_IN = 2.7V
2.1
2.0
1.9
1.8
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3419 G05
Supply Current
vs Temperature
60 _{ILOAD = 0A}
RUN1 = RUN2 = V_IN
50
40
V_IN = 5.5V
30
V_IN = 2.7V
20
10
–50 –25 0
25 50 75 100
TEMPERATURE (°C)
3419 G06
Switch Leakage vs Input Voltage
3.0
2.5
2.0
MAIN SWITCH
1.5
1.0
SYNCHRONOUS
SWITCH
0.5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_IN (V)
3419 G07
Switch On-Resistance vs
Input Voltage
0.50
0.45
0.40
MAIN SWITCH
0.35
0.30
SYNCHRONOUS
SWITCH
0.25
0.20
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V_IN (V)
3419 G08
Switch On-Resistance vs
Temperature
0.6
0.5
MAIN SWITCH
0.4
0.3
0.2
0.1
–50 –25
SYNCHRONOUS SWITCH
V_IN = 2.7V
V_IN = 3.6V
V_IN = 4.2V
0 25 50 75
TEMPERATURE (°C)
100 125
3419 G09
3419f
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