Datasheet

LTC3101
5
3101fb
TYPICAL PERFORMANCE CHARACTERISTICS
Buck Effi ciency
2 AA Cells to 1.5V
Buck Effi ciency
2 AA Cells to 1.2V
Buck Effi ciency
USB (5V) to 1.8V
Buck-Boost Effi ciency
2 AA Cells to 3.3V
Buck-Boost Effi ciency
USB (5V) to 3.3V
Buck-Boost Effi ciency
Li-Ion to 3.3V
Buck Burst Mode Threshold
No-Load Quiescent Current in
Burst Mode Operation
Standby Quiescent Current
(T
A
= 25°C unless otherwise specifi ed)
LOAD CURRENT (mA)
0.1
0
EFFICIENCY (%)
10
30
40
50
100
70
1
10
3101 G01
20
80
90
60
100
1000
L = 4.7µH
V
BAT
= 3.2V
V
BAT
= 1.8V
PWM Mode
Burst Mode OPERATION
LOAD CURRENT (mA)
0.1
0
EFFICIENCY (%)
10
30
40
50
100
70
1
10
3101 G02
20
80
90
60
100
1000
L = 4.7µH
V
BAT
= 3.2V
V
BAT
= 1.8V
PWM Mode
Burst Mode OPERATION
LOAD CURRENT (mA)
0.1
0
EFFICIENCY (%)
10
30
40
50
100
70
1
10
3101 G03
20
80
90
60
100
1000
L = 4.7µH
PWM Mode
Burst Mode
OPERATION
LOAD CURRENT (mA)
0
EFFICIENCY (%)
10
30
40
50
100
70
1
10
3101 G04
20
80
90
60
100
1000
L = 4.7µH
V
BAT
= 3.2V
V
BAT
= 1.8V
PWM Mode
Burst Mode
OPERATION
LOAD CURRENT (mA)
0
EFFICIENCY (%)
10
30
50
40
100
L = 4.7µH
70
1
10
3101 G05
20
80
90
60
100
1000
PWM Mode
Burst Mode
OPERATION
LOAD CURRENT (mA)
0
EFFICIENCY (%)
10
30
50
40
100
70
1
10
3101 G06
20
80
90
60
100
1000
PWM Mode
Burst Mode
OPERATION
L = 4.7µH
V
BAT
= 3.0V
V
BAT
= 4.2V
SUPPLY VOLTAGE, V
BAT
OR V
USB
(V)
1.5
20
25
35
4.5
3101 G07
15
10
2.5 3.5 5.5
5
0
30
LOAD CURRENT (mA)
L = 4.7µH
V
OUT
= 0.8V
V
OUT
= 1.2V
V
OUT
= 1.8V
SUPPLY VOLTAGE, V
BAT
OR V
USB
(V)
1
50
60
70
5
3101 G08
40
30
234 6
20
10
0
QUIESCENT CURRENT (µA)
BUCK1, BUCK2 AND
BUCK-BOOST ENABLED
BUCK-BOOST ENABLED
BOTH BUCKS DISABLED
SUPPLY VOLTAGE, V
BAT
OR V
USB
(V)
1
INPUT SUPPLY CURRENT (µA)
12
16
20
5
3101 G09
8
4
10
14
18
6
2
0
2
3
4
6
LDO AND MAX OUTPUTS ACTIVE
PWRON = 0V, PWRKEY= FLOATING