Datasheet

LTC3429/LTC3429B
3
3429fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Single-Cell to 3.3V Efficiency
(LTC3429 Only)
OUTPUT CURRENT (mA)
60
EFFICIENCY (%)
80
100
50
70
90
0.1 10 100 1000
3429 G01
40
0.01
POWER LOSS (W)
1
100
0.001
0.1
10
0.0001
1
V
IN
= 1.5V
EFFICIENCY
POWER LOSS
V
IN
= 1.5V
V
IN
= 1.2V
V
IN
= 1.2V
OUTPUT CURRENT (mA)
60
80
100
50
70
90
0.1 10 100 1000
3429 G02
40
1
V
IN
= 3V
V
IN
= 3V
V
IN
= 2.4V
V
IN
= 2.4V
EFFICIENCY (%)
0.01
POWER LOSS (W)
1
100
0.001
0.1
10
0.0001
EFFICIENCY
POWER LOSS
OUTPUT CURRENT (mA)
60
80
100
50
70
90
0.1 10 100 1000
3429 G03
40
1
V
IN
= 3V
V
IN
= 3V
V
IN
= 2.4V
V
IN
= 2.4V
0.01
POWER LOSS (W)
1
100
0.001
0.1
10
0.0001
EFFICIENCY
POWER LOSS
EFFICIENCY (%)
2-Cell to 3.3V Efficiency
(LTC3429 Only)
2-Cell to 5V Efficiency
(LTC3429 Only)
(T
A
= 25°C unless otherwise specified)
Li-Ion to 5V Efficiency
(LTC3429 Only)
Efficiency vs Input Voltage
Burst Mode Output Current
Threshold vs Input Voltage
(LTC3429 Only)
OUTPUT CURRENT (mA)
60
80
100
50
70
90
0.1 10 100 1000
3429 G04
40
1
V
IN
= 3.6V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 4.2V
EFFICIENCY
POWER LOSS
0.01
POWER LOSS (W)
1
100
0.001
0.1
10
0.0001
EFFICIENCY (%)
INPUT VOLTAGE (V)
0.5
40
EFFICIENCY (%)
50
60
70
80
90
100
1.5 2.5 3.5 4.5
3429 G05
V
IN
> V
OUT
PMOS LDO
MODE
V
OUT
= 3.3V
I
OUT
= 50mA
INPUT VOLTAGE (V)
0.9
20
25
35
2.4 3.4
3429 G06
15
10
1.4 1.9
2.9 3.9 4.4
5
0
30
OUTPUT CURRENT (mA)
V
OUT
= 3.3V
L = 4.7µH
V
OUT
= 5V
No Load Input Current
vs Input Voltage (LTC3429 Only)
Maximum Load Current
Capability at Output 4% Below
Regulation Point
Minimum Start-Up Input Voltage
vs Load Current
INPUT VOLTAGE (V)
1.4
10
100
1000
2.4
3429 G07
INPUT CURRENT (µA)
0.9
4.41.9
2.9 3.4 3.9
V
OUT
= 3.3V
L = 4.7µH
V
OUT
= 5V
INPUT VOLTAGE (V)
0.5
0
OUTPUT CURRENT (mA)
100
200
300
400
1.5 2.5
3.5
4.5
3429 G08
500
600
12
3
4
V
OUT
= 3.3V
L = 4.7µH
V
OUT
= 5V
OUTPUT CURRENT (mA)
0
0.7
INPUT VOLTAGE (V)
0.9
1.1
1.3
1.5
1.9
50 100
3429 G09
150
1.7
CURRENT
SINK LOAD
RESISTOR
LOAD