LTC3404 Datasheet, PDF (4/16 Pages) Linear Technology – 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator

LTC3404
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs Output Current
95
V_IN = 3V
90
85
V_IN = 3.6V
80
V_IN = 4.2V
75
V_IN = 6V
70
V_OUT = 1.8V
L = 4.7µH
65
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
3404 G04
Oscillator Frequency
vs Temperature
1.55
V_IN = 3.6V
1.50
1.45
1.40
1.35
1.30
1.25
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3404 G06
R_DS(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
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INPUT VOLTAGE (V)
3404 G09
Efficiency vs Output Current
100
95
V_IN = 3.6V
90
V_IN = 6V
85
V_IN = 4.2V
80
75
70
65
0.1
V_OUT = 3.1V
L = 4.7µH
1
10
100
OUTPUT CURRENT (mA)
1000
3404 G4a
Oscillator Frequency
vs Supply Voltage
1.55
1.50
1.45
1.40
1.35
1.30
1.25
2
4
6
SUPPLY VOLTAGE (V)
8
3404 G07
R_DS(ON) vs Temperature
1.2
SYNCHRONOUS SWITCH
1.1
MAIN SWITCH
1.0
0.9
0.8
V_IN = 3V
0.7
V_IN = 5V
0.6
0.5
0.4
0.3
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3404 G10
Reference Voltage
vs Temperature
0.814
V_IN = 3.6V
0.809
0.804
0.799
0.794
0.789
0.784
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3404 G05
Output Voltage vs Load Current
1.83
1.82
1.81
1.80
1.79
1.78
1.77
PULSE SKIPPING MODE
1.76 _{VIN = 3.6V}
L = 4.7µF
1.75
0
200
400
600
LOAD CURRENT (mA)
800
3404 G08
DC Supply Current
vs Input Voltage
500
V_OUT = 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
4