LTC3370_15 Datasheet, PDF (8/24 Pages) Linear Technology – 4-Channel 8A Configurable Buck DC/DCs

LTC3370
Typical Performance Characteristics T_A = 25°C, unless otherwise noted.
NMOS R_DS(ON) vs Temperature
450
V_IN = 2.25V
400
V_IN = 3.3V
V_IN = 5.5V
350
300
250
200
150
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3370 G19
1A Buck Efficiency vs I_LOAD,
V_OUT = 1.2V
100 _{Burst Mode OPERATION}
90
80
70
60
50
V_IN = 2.25V
V_IN = 3.3V
40
V_IN = 5.5V
V_IN = 2.25V
30
V_IN = 3.3V
20
V_IN = 5.5V
FORCED
V_OUT = 1.2V
10
CONTINUOUS ^fOSC ^{= 2MHz}
0
MODE
L = 2.2µH
1
10
100
1000
LOAD CURRENT (mA)
3370 G20
1A Buck Power Loss vs I_LOAD,
V_OUT = 1.2V
1000
900
800
Burst Mode OPERATION
V_OUT = 1.2V
f_OSC = 2MHz
L = 2.2µH
700
V_IN = 2.25V
600
500
V_IN = 3.3V
400
300
V_IN = 5.5V
200
100
0
1
10
100
1000
LOAD CURRENT (mA)
3370 G21
1A Buck Efficiency vs I_LOAD,
V_OUT = 1.8V
100
Burst Mode OPERATION
90
80
70
60
V_IN = 2.25V
50
V_IN = 3.3V
V_IN = 5.5V
40
V_IN = 2.25V
30
V_IN = 3.3V
V_IN = 5.5V
20
FORCED
V_OUT = 1.8V
10
CONTINUOUS fOSC = 2MHz
0
MODE
L = 2.2µH
1
10
100
1000
LOAD CURRENT (mA)
3370 G22
1A Buck Power Loss vs I_LOAD,
V_OUT = 1.8V
1000 _{Burst Mode OPERATION}
900 V_OUT = 1.8V
800
f_OSC = 2MHz
L = 2.2µH
700
600
V_IN = 2.25V
500
V_IN = 3.3V
400
300
V_IN = 5.5V
200
100
0
1
10
100
1000
LOAD CURRENT (mA)
3370 G23
1A Buck Efficiency vs I_LOAD,
V_OUT = 2.5V
100
90
80
Burst Mode
70
OPERATION
60
V_IN = 2.7V
50
V_IN = 3.3V
40
V_IN = 5.5V
V_IN = 2.7V
30
V_IN = 3.3V
V_IN = 5.5V
20
FORCED
V_OUT = 2.5V
10
CONTINUOUS fOSC = 2MHz
0
MODE
L = 2.2µH
1
10
100
1000
LOAD CURRENT (mA)
3370 G24
1A Buck Power Loss vs I_LOAD,
V_OUT = 2.5V
1000
900
800
Burst Mode OPERATION
V_OUT = 2.5V
f_OSC = 2MHz
L = 2.2µH
700
600
500
V_IN = 3.3V
400
300
V_IN = 2.7V
200
V_IN = 5.5V
100
0
1
10
100
1000
LOAD CURRENT (mA)
3370 G25
1A Buck Efficiency vs I_LOAD,
V_OUT = 3.3V
100
90
80
70 ^{Burst Mode}
OPERATION
60
50
40
30
V_IN = 4.2V
V_IN = 5.5V
V_IN = 4.2V
V_IN = 5.5V
20
FORCED
V_OUT = 3.3V
10
CONTINUOUS fOSC = 2MHz
0
MODE
L = 2.2µH
1
10
100
1000
LOAD CURRENT (mA)
3370 G26
1A Buck Power Loss vs I_LOAD,
V_OUT = 3.3V
1000
900
800
Burst Mode OPERATION
V_OUT = 3.3V
f_OSC = 2MHz
L = 2.2µH
700
600
500
V_IN = 5.5V
400
300
V_IN = 4.2V
200
100
0
1
10
100
1000
LOAD CURRENT (mA)
3370 G27
3370f
8
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