LTC3418 Datasheet, PDF (4/20 Pages) Linear Technology – 8A, 4MHz, Monolithic Synchronous Step-Down Regulator

LTC3418
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C unless otherwise noted.
Switch Leakage vs Input Voltage
5.0
4.5
4.0
3.5
3.0
2.5
2.0
NFET
1.5
1.0
PFET
0.5
0
2.25 2.75 3.25 3.75 4.25 4.75 5.25
INPUT VOLTAGE (V)
3418 G03
Quiescent Current
vs Input Voltage
500
450
400
350
300
250
200
150
100
50
0
2.5 3 3.5 4 4.5
INPUT VOLTAGE (V)
5 5.5
3418 G04
Frequency vs R_OSC
4500
V_IN = 3.3V
4000
3500
3000
2500
2000
1500
1000
500
0
10 50 90 130 170
R_OSC (kΩ)
210 250
3418 G08
Frequency vs Temperature
1100
V_IN = 3.3V
1080
1060
1040
1020
1000
980
960
940
920
900
–40 –20 0 20 40 60 80 100 120
TEMPERATURE (°C)
3418 G06
Frequency vs Input Voltage
1100
1080
1060
1040
1020
1000
980
960
940
920
900
2.25 2.75 3.25 3.75 4.25 4.75 5.25
INPUT VOLTAGE (V)
3418 G05
Efficiency and Power Loss
vs Load Current
100
100000
90
EFFICIENCY
80
10000
70
60
POWER LOSS
50
1000
100
40
30
20
0.01
10
V_IN = 3.3V
V_OUT = 2.5V
1
0.1
1
10
LOAD CURRENT (A)
3418 TA01b
Efficiency vs Load Current
100
Burst Mode OPERATION
90
80
70
FORCED CONTINUOUS
60
50
40
30
20
10 ^VIN ^{= 3.3V}
V_OUT = 2.5V
0
0.01
0.1
1
LOAD CURRENT (A)
10
3418 G10
Efficiency vs Load Current
100
90
3.3V
80
5V
70
60
50
40
30
20
10
0
0.01
FORCED CONTINUOUS
V_OUT = 2.5V
0.1
1
10
LOAD CURRENT (A)
3418 G11
Efficiency vs Load Current
100
3.3V
90
80
5V
70
60
50
40
30
20
10 ^{Burst Mode OPERATION}
V_OUT = 2.5V
0
0.01
0.1
1
LOAD CURRENT (A)
10
3418 G12
3418f
4