LTC3404IMS8 Datasheet, PDF (4/16 Pages) Linear Technology – 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator

LTC3404
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs Input Voltage
95
I_OUT = 100mA
90
I_OUT = 10mA
85
I_OUT = 1mA ^{IOUT = 300mA}
80
75
70
I_OUT = 0.1mA
65
Burst Mode OPERATION
V_OUT = 2.5V
L = 4.7μH
60
2
3
4
5
6
7
8
INPUT VOLTAGE (V)
3404 G01
Efficiency vs Output Current
90
V_IN = 3V
85
80
V_IN = 3.6V
75
V_IN = 4.2V
70
V_IN = 6V
65
60
0.1
1
V_OUT = 1.8V
L = 4.7μH
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
Efficiency vs Output Current
100
90 _{VIN = 3.6V}
80
V_IN = 4.2V
70
60
50
V_IN = 3.6V
40
V_IN = 4.2V
30
20
10
0
0.1
PULSE SKIPPING MODE
Burst Mode OPERATION
V_OUT = 1.8V
L = 4.7μH
1
10
100
OUTPUT CURRENT (mA)
1000
3404 G02
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
Efficiency vs Output Current
90
85 ^{L = 4.7μH}
80
L = 3.5μH
75
70
65
60
Burst Mode OPERATION
55 _{VIN = 6V}
V_OUT = 2.5V
50
0.1
1
10
100
OUTPUT CURRENT (mA)
1000
3404 G03
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
3404fb
4