LTC3414IFE Datasheet, PDF (4/16 Pages) Linear Technology – 4A, 4MHz, Monolithic Synchronous Step-Down Regulator

LTC3414
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs Load Current, Burst
Mode Operation
100
95
V_IN = 3.3V
90
V_IN = 5V
85
T_A = 25°C
80
75
70
65
60
55
50
0.001
0.01
0.1
1
10
LOAD CURRENT (A)
3414 G10
Efficiency vs Load Current,
Forced Continuous
100
V_OUT = 2.5V
90 _{TA = 25°C}
80
V_IN = 3.3V
70
60
V_IN = 5V
50
40
30
20
10
0
0.001
0.01
0.1
1
LOAD CURRENT (A)
10
3414 G11
Efficiency vs Load Current
100
95 ^{Burst Mode OPERATION}
T_A = 25°C
90
85
80
FORCED
CONTINUOUS
75
70
65
60
55
50
0.001
V_IN = 3.3V
V_OUT = 2.5V
0.01
0.1
1
LOAD CURRENT (A)
10
3414 G12
Efficiency vs Input Voltage
98
V_OUT = 2.5V
96
I_OUT = 1A
T_A = 25°C
94
92
90
88
I_OUT = 4A
86
84
82
80
78
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
3414 G13
Efficiency vs Frequency
100
L = 1μH
95
V_IN = 3.3V
V_OUT = 2.5V
T_A = 25°C
L = 0.47μH
90
L = 0.2μH
85
80
75
70
300 800 1300 1800 2300 2800 3300 3800
FREQUENCY (kHz)
3414 G14
Load Regulation
0
–0.05
V_IN = 3.3V
V_OUT = 2.5V
T_A = 25°C
–0.10
–0.15
–0.20
–0.25
–0.30
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
LOAD CURRENT (A)
3414 G15
Burst Mode Operation
Load Step Transient Forced
Continuous
OUTPUT
VOLTAGE
20mV/DIV
OUTPUT
VOLTAGE
100mV/DIV
INDUCTOR
CURRENT
500mA/DIV
10μs/DIV
V_IN = 3.3V, V_OUT = 2.5V
LOAD = 250mA
3414 G16
INDUCTOR
CURRENT
2A/DIV
20μs/DIV
V_IN = 3.3V, V_OUT = 2.5V
LOAD STEP = 0A TO 4A
3414 G17
3414fb
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