LTC3401 Datasheet, PDF (4/16 Pages) Linear Technology – 1A, 3MHz Micropower Synchronous Boost Converter

LTC3401
TYPICAL PERFOR A CE CHARACTERISTICS
Transient Response 50mA to 500mA
Burst Mode Operation
V_OUT
200mV/DIV
V_OUT
AC
100mV/DIV
Burst Mode Operation
V_OUT
AC
100mV/DIV
550mA
I_OUT
50mA
C_OUT = 22µF
L = 3.3µH
f_OSC = 1MHz
200µs/DIV
SW
1V/DIV
3401 G04
V_IN = 1.2V
5ms/DIV
V_OUT = 3.3V
C_OUT = 100µF
I_OUT = 250µA
MODE/SYNC PIN = HIGH
SW
1V/DIV
3401 G05
V_IN = 1.2V
200µs/DIV
V_OUT = 3.3V
C_OUT = 100µF
I_OUT = 20mA
MODE/SYNC PIN = HIGH
3401 G06
Converter Efficiency 1.2V to 3.3V
100
90
300kHz
Burst Mode
80 _OPERATION
70
3MHz
60
1MHz
50
40
30
20
10
0
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
3401 G07
Start-Up Voltage
vs I_OUT
500
T_A = 25°C
400
300
200
100
0
0.8 0.9
1 1.1 1.2
V_IN (V)
1.3 1.4
3401 G09
Converter Efficiency 2.4V to 3.3V
100
90 ^{Burst Mode}
OPERATION
80
70
300kHz
60
3MHz
1MHz
50
40
30
20
10
0
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
3401 G08
Efficiency Loss Without Schottky
vs Frequency
14
T_A = 25°C
12
10
8
6
4
2
0
0.2 0.6
1.0 1.4 1.8 2.2
FREQUENCY (MHz)
2.6 3.0
3401 G11
Converter Efficiency 3.6V to 5V
100
Burst Mode OPERATION
90
80
70
1MHz
60
FIXED
FREQUENCY
50
40
30
20
10
0
0.1
1
10
100
1000
LOAD CURRENT (mA)
3401 G10
Current Limit
1.80
1.75
1.70
1.65
1.60
1.55
1.50
1.45
1.40
–55
–15
25
65
TEMPERATURE (°C)
105 125
3401 G12
3401fa
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