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| LTC3407A-2 Datasheet, PDF (4/16 Pages) Linear Technology – Dual Synchronous 800mA,2.25MHz Step-Down DC/DC Regulator | |||
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LTC3407A-2
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise specified.
Burst Mode Operation
Pulse Skipping Mode
SW
5V/DIV
VOUT
50mV/DIV
SW
5V/DIV
VOUT
10mV/DIV
IL
200mA/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 50mA
CIRCUIT OF FIGURE 3
2μs/DIV
3407A2 G01
IL
100mA/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 50mA
CIRCUIT OF FIGURE 3
1μs/DIV
3407A2 G02
Load Step
VOUT1
200mV/DIV
VOUT2
100mV/DIV
IL
500mA/DIV
ILOAD
500mA/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 50mA TO 600mA
CIRCUIT OF FIGURE 3
20μs/DIV
Efficiency vs Input Voltage
100
100mA
90
800mA
80
10mA
1mA
70
60
50
40
30
20
10 VOUT = 1.8V
CIRCUIT OF FIGURE 3
0
2
3
4
5
6
INPUT VOLTAGE (V)
3407A2 G04
4
Soft Start
3407A2 G03
VIN
2V/DIV
VOUT1
1V/DIV
IL
500mA/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 500mA
CIRCUIT OF FIGURE 4
1ms/DIV
3407A2 G16
Oscillator Frequency vs
Temperature
2.5
VIN = 3.6V
2.4
2.3
2.2
2.1
2.0
â50 â25
0 25 50 75
TEMPERATURE (°C)
100 125
3407A2 G05
Oscillator Frequency vs Supply
Voltage
10
8
6
4
2
0
â2
â4
â6
â8
â10
2
3
4
5
6
SUPPLY VOLTAGE (V)
3407A2 G06
3407a2f
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