LTC3101
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise specified)
Buck Efficiency
2 AA Cells to 1.5V
Buck Efficiency
2 AA Cells to 1.2V
Buck Efficiency
USB (5V) to 1.8V
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
L = 4.7μH
Burst Mode OPERATION
Burst Mode
OPERATION
PWM Mode
PWM Mode
PWM Mode
L = 4.7μH
L = 4.7μH
V
BAT
V
BAT
= 3.2V
= 1.8V
V
BAT
V
BAT
= 3.2V
= 1.8V
0.1
1
10
100
1000
0.1
1
10
100
1000
0.1
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
3101 G01
3101 G02
3101 G03
Buck-Boost Efficiency
2 AA Cells to 3.3V
Buck-Boost Efficiency
USB (5V) to 3.3V
Buck-Boost Efficiency
Li-Ion 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
L = 4.7μH
Burst Mode
OPERATION
Burst Mode
OPERATION
Burst Mode
OPERATION
PWM Mode
PWM Mode
PWM Mode
L = 4.7μH
L = 4.7μH
V
BAT
V
BAT
= 3.2V
= 1.8V
V
BAT
V
BAT
= 3.0V
= 4.2V
1
10
100
1000
1
10
100
1000
1
10
100
1000
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
3101 G06
3101 G04
3101 G05
No-Load Quiescent Current in
Burst Mode Operation
Buck Burst Mode Threshold
Standby Quiescent Current
20
18
16
14
12
10
8
70
60
35
30
25
L = 4.7μH
BUCK1, BUCK2 AND
BUCK-BOOST ENABLED
V
= 0.8V
OUT
50
40
30
20
10
0
V
= 1.2V
OUT
OUT
20
15
10
5
BUCK-BOOST ENABLED
BOTH BUCKS DISABLED
V
= 1.8V
6
4
LDO AND HSO OUTPUTS ACTIVE
PWRON = 0V, PWRKEY= FLOATING
2
0
0
2
3
4
6
2
4
1
5
1
3
5
6
2.5
3.5
5.5
1.5
4.5
OR V
SUPPLY VOLTAGE, V
OR V
(V)
SUPPLY VOLTAGE, V
OR V
(V)
USB
SUPPLY VOLTAGE, V
(V)
USB
BAT
USB
BAT
BAT
3101 G08
3101 G09
3101 G07
3101f
5
Linear [ Linear ]
