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