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LTC3374
9
3374fa
For more information www.linear.com/LTC3374
4A Buck Efficiency vs I
LOAD
4A Buck Efficiency vs I
LOAD
1A Buck Efficiency vs Frequency
(Forced Continuous Mode)
Typical perForMance characTerisTics
1A Buck Efficiency vs Frequency
(Forced Continuous Mode)
1A Buck Efficiency vs I
LOAD
(Across Operating Frequency)
1A Buck Regulator Load Regulation
(Forced Continuous Mode)
4A Buck Regulator Load Regulation
(Forced Continuous Mode)
1A Buck Regulator Line Regulation
(Forced Continuous Mode)
LOAD CURRENT (mA)
1
40
EFFICIENCY (%)
50
60
70
80
10 100 1000
3374 G25
30
20
10
0
90
100
Burst Mode
OPERATION
FORCED
CONTINUOUS
MODE
V
OUT
= 1.8V
f
OSC
= 2MHz
L = 2.2µH
V
IN
= 2.25V
V
IN
= 3.3V
V
IN
= 5.5V
LOAD CURRENT (mA)
1
40
EFFICIENCY (%)
50
60
70
80
10 100 1000
3374 G26
30
20
10
0
90
100
Burst Mode
OPERATION
FORCED
CONTINUOUS
MODE
V
OUT
= 2.5V
f
OSC
= 2MHz
L = 2.2µH
V
IN
= 2.7V
V
IN
= 3.3V
V
IN
= 5.5V
FREQUENCY (MHz)
1
EFFICIENCY (%)
60
80
100
2.6
3374 G27
40
20
50
70
90
30
10
0
1.4
1.8
2.2
1.2 2.8
1.6
2
2.4
3
V
IN
= 5.5V
V
IN
= 3.3VV
IN
= 2.25V
V
OUT
= 1.8V
I
L
= 100mA
f
OSC
= 2MHz
L = 3.3µH
FREQUENCY (MHz)
1
EFFICIENCY (%)
60
80
100
2.6
3374 G28
40
20
50
70
90
30
10
0
1.4
1.8
2.2
1.2 2.8
1.6
2
2.4
3
I
L
= 100mA
I
L
= 500mA
I
L
= 20mA
V
OUT
= 1.8V
V
IN
= 3.3V
f
OSC
= 2MHz
L = 3.3µH
LOAD CURRENT (mA)
1
40
EFFICIENCY (%)
50
60
70
80
10 100 1000
3374 G29
30
20
10
0
90
100
Burst Mode
OPERATION
FORCED
CONTINUOUS
MODE
V
OUT
= 1.8V
V
IN
= 3.3V
f
OSC
= 1MHz
L = 3.3µH
f
OSC
= 2MHz
L = 2.2µH
f
OSC
= 3MHz
L = 1µH
V
IN
= 5.5V
DROPOUT
V
IN
= 3.3V
V
IN
= 2.25V
I
L
(mA)
1
V
OUT
(V)
1.800
1.812
1000
3374 G30
1.792
1.788
1.784
1.780
10010
1.820
1.796
1.804
1.808
1.816
f
OSC
= 2MHz
L = 2.2µH
V
IN
= 5.5V
V
IN
= 3.3V
V
IN
= 2.25V
I
L
(mA)
1
V
OUT
(V)
1.800
1.812
1000
3374 G31
1.792
1.788
1.784
1.780
10010
1.820
1.796
1.804
1.808
1.816
f
OSC
= 2MHz
L = 2.2µH
DROPOUT
I
L
= 100mA
I
L
= 500mA
V
IN
(V)
2.25 2.75
V
OUT
(V)
1.810
5.254.25 4.75
3374 G32
1.790
1.785
1.780
3.753.25
1.820
1.795
1.800
1.805
1.815
f
OSC
= 2MHz
L = 2.2µH