Datasheet

5
LTC3404
3404fb
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Switch Leakage vs Temperature
TEMPERATURE (°C)
–50
SWITCH LEAKAGE (μA)
25
3404 G13
2.0
1.0
–25 0 50
0.5
0
2.5
1.5
75 100 125
MAIN
SWITCH
V
IN
= 7V
RUN = 0V
SYNCHRONOUS
SWITCH
Burst Mode Operation
Switch Leakage vs Input Voltage
INPUT VOLTAGE (V)
0
0
SWITCH LEAKAGE (nA)
0.2
0.4
0.6
0.8
24
6
8
3404 G20
1.0
1.2
13
5
7
SYNCHRONOUS
SWITCH
MAIN
SWITCH
RUN = 0V
Pulse Skipping Mode Operation Start-Up from Shutdown
DC Supply Current
vs Temperature
TEMPERATURE (°C)
–50
300
350
400
450
250
200
150
100
50
0
25 75
3404 G12
–25 0
50 125100
SUPPLY CURRENT (μA)
PULSE SKIPPING
MODE
Burst Mode
OPERATION
V
IN
= 3.6V
V
OUT
= 1.5V
10μs/DIV
V
IN
= 4.2V
V
OUT
= 1.5V
L = 4.7μH
C
IN
= 10μF
C
OUT
= 22μF
I
LOAD
= 30mA
SW
5V/DIV
I
L
200mA/DIV
V
OUT
50mV/DIV
AC
COUPLED
3404 G14
500ns/DIV
V
IN
= 4.2V
V
OUT
= 1.5V
L = 4.7μH
C
IN
= 10μF
C
OUT
= 22μF
I
LOAD
= 30mA
SW
5V/DIV
I
L
100mA/DIV
V
OUT
10mV/DIV
3404 G15
40μs/DIV
V
IN
= 3.6V
V
OUT
= 1.5V
L = 4.7μH
C
IN
= 10μF
C
OUT
= 22μF
I
LOAD
= 500mA
RUN
2V/DIV
I
L
500mA/DIV
V
OUT
1V/DIV
3404 G16
INPUT VOLTAGE (V)
10
R
DS(ON)
(Ω)
0.5
0.6
0.7
5678
3404 G09
0.4
0.3
0
0.1
2
3
4
0.2
0.9
0.8
SYNCHRONOUS
SWITCH
MAIN
SWITCH
R
DS(ON)
vs Input Voltage
R
DS(ON)
vs Temperature
DC Supply Current
vs Input Voltage
TEMPERATURE (°C)
–50 –25
0.3
R
DS(ON)
(Ω)
0.4
0.6
0.7
0.8
75 100
1.2
3404 G10
0.5
0 25 50 125
0.9
1.0
1.1
V
IN
= 3V
V
IN
= 5V
SYNCHRONOUS SWITCH
MAIN SWITCH
INPUT VOLTAGE (V)
0
DC SUPPLY CURRENT (μA)
200
500
2
4
5
3404 G11
100
400
300
250
150
50
450
350
3
6
78
V
OUT
= 1.8V
PULSE SKIPPING
MODE
Burst Mode
OPERATION