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| LTC3404IMS8 Datasheet, PDF (5/16 Pages) Linear Technology – 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator | |||
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TYPICAL PERFOR A CE CHARACTERISTICS
RDS(ON) vs Input Voltage
0.9
0.8
0.7
SYNCHRONOUS
SWITCH
0.6
0.5
MAIN
SWITCH
0.4
0.3
0.2
0.1
0
012345678
INPUT VOLTAGE (V)
3404 G09
DC Supply Current
vs Temperature
450
400
350
300
250
VIN = 3.6V
VOUT = 1.5V
200
PULSE SKIPPING
MODE
150
100
50
0
â50 â25
Burst Mode
OPERATION
0 25 50 75
TEMPERATURE (°C)
100 125
3404 G12
Burst Mode Operation
RDS(ON) vs Temperature
1.2
SYNCHRONOUS SWITCH
1.1
MAIN SWITCH
1.0
0.9
0.8
VIN = 3V
0.7
VIN = 5V
0.6
0.5
0.4
0.3
â50 â25
0 25 50 75
TEMPERATURE (°C)
100 125
3404 G10
Switch Leakage vs Temperature
2.5
VIN = 7V
RUN = 0V
2.0
1.5
1.0
MAIN
SWITCH
SYNCHRONOUS
0.5
SWITCH
0
â 50 â 25
0 25 50 75
TEMPERATURE (°C)
100 125
3404 G13
Pulse Skipping Mode Operation
LTC3404
DC Supply Current
vs Input Voltage
500
VOUT = 1.8V
450
400
PULSE SKIPPING
350
MODE
300
250
200
150
100
50
0
2
Burst Mode
OPERATION
3
4
5
6
INPUT VOLTAGE (V)
7
8
3404 G11
Switch Leakage vs Input Voltage
1.2
RUN = 0V
1.0
SYNCHRONOUS
SWITCH
0.8
0.6
0.4
MAIN
SWITCH
0.2
0
0 1234 56 78
INPUT VOLTAGE (V)
3404 G20
Start-Up from Shutdown
SW
5V/DIV
VOUT
50mV/DIV
AC
COUPLED
IL
200mA/DIV
VIN = 4.2V
VOUT = 1.5V
L = 4.7μH
10μs/DIV
CIN = 10μF
COUT = 22μF
ILOAD = 30mA
SW
5V/DIV
VOUT
10mV/DIV
IL
100mA/DIV
3404 G14
VIN = 4.2V
VOUT = 1.5V
L = 4.7μH
500ns/DIV
CIN = 10μF
COUT = 22μF
ILOAD = 30mA
RUN
2V/DIV
VOUT
1V/DIV
IL
500mA/DIV
3404 G15
VIN = 3.6V
VOUT = 1.5V
L = 4.7μH
40μs/DIV
CIN = 10μF
COUT = 22μF
ILOAD = 500mA
3404 G16
3404fb
5
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