LTC3411_15 Datasheet, PDF (6/24 Pages) Linear Technology – 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter

LTC3411
TYPICAL PERFORMANCE CHARACTERISTICS
Load Regulation
0.4
0.3
Burst Mode
0.2
OPERATION
0.1 ^{PULSE SKIP}
V_IN = 3.3V
V_OUT = 2.5V
0 _FORCED
–0.1 ^CONTINUOUS
–0.2
–0.3
–0.4
–0.5
1
10
100
1000
LOAD CURRENT (mA)
10000
3411 G07
Frequency Variation
vs Temperature
10
8
6
4
2
0
–2
–4
–6
–8
–10
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3411 G10
Line Regulation
0.50
V_OUT = 1.8V
0.45 _{TA = 25°C}
0.40
0.35
0.30
0.25
0.20
I_OUT = 1.25A
0.15
0.10
I_OUT = 400mA
0.05
0
2
3
4
5
6
V_IN (V)
3411 G08
Efficiency vs Frequency
100
V_IN = 3.3V
V_OUT = 2.5V
I_OUT = 500mA
T_A = 25°C
95
90
85
0
1
2
3
FREQUENCY (MHz)
4
3411 G11
Frequency vs V_IN
10
V_OUT = 1.8V
8 _{IOUT = 1.25A}
6 ^{TA = 25°C}
4
2
0
–2
–4
–6
–8
–10
2
3
4
V_IN (V)
5
6
3411 G09
R_DS(ON) vs V_IN
120
T_A = 25°C
115
110
SYNCHRONOUS SWITCH
105
MAIN SWITCH
100
95
90
2.5 3 3.5 4 4.5 5 5.5 6
V_IN (V)
3411 G12
3411fb
6