LTC3427_15 Datasheet, PDF (4/12 Pages) Linear Technology – 500mA, 1.25MHz Synchronous Step-Up DC/DC Converter in 2mm 2mm DFN Package

LTC3427
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C unless otherwise specified.
Current Limit
0.90
V_IN = 2.4V
V_OUT = 3.3V
0.80
FB Voltage vs Temperature
1.25
V_IN = 2.4V
V_OUT = 3.3V
Efficiency vs V_IN
100
90
80
V_OUT = 3.3V
I_OUT = 100mA
0.70
1.24
70
0.60
0.50
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3427 G06
Frequency Accuracy
vs Temperature
1.35
V_IN = 2.4V
V_OUT = 3.3V
1.30
1.23
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3427 G07
60
50
40
1.5
V_IN > V_OUT
PMOS LDO MODE
2.5
3.5
V_IN (V)
4.5
3427 G08
SW Pin Anti-Ringing Operation
INDUCTOR
CURRENT
50mA/DIV
1.25
SW
2V/DIV
1.20
1.15
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3427 G09
R_DS(ON) vs Temperature
0.70
V_IN = 2.4V
0.65 ^{VOUT = 3.3V}
0.60
PMOS
0.55
NMOS
0.50
0.45
0.40
0.35
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3427 G11
V_IN = 1.8V
V_OUT = 3.3V
C_OUT = 4.7µF
L = 4.7µH
200ns/DIV
3427 G10
V_IN Supply Current (No Load)
0.45
T_A = 25°C
V_IN = V_OUT = V_FB
0.40
0.35
0.30
1.5
2.5
3.5
4.5
5.5
V_IN (V)
3427 G12
3427fa
4