Datasheet

LTC3499/LTC3499B
4
3499fc
TYPICAL PERFORMANCE CHARACTERISTICS
LOAD CURRENT (mA)
0.1
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
90
100
0.1
1
10
100
1000
10000
100000
1 10 100 1000
3499 G01
V
IN
= 3.2V
V
IN
= 2.4V
V
IN
= 1.8V
POWER LOSS
EFFICIENCY
LOAD CURRENT (mA)
0.1
70
80
100
100
3499 G03
60
50
1 10 1000
40
30
90
100
1000
100000
10
1
0.1
10000
EFFICIENCY (%)
POWER LOSS (mW)
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 3V
POWER LOSS
EFFICIENCY
LOAD CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3499 G17
0
1
V
IN
= 3.2V
V
IN
= 2.4V
V
IN
= 1.8V
TEMPERATURE (°C)
–50
CURRENT LIMIT (A)
1.00
1.01
1.02
25
75
3499 G04
0.99
0.98
0.97
0.96
–25 0 50
1.03
1.04
100
LOAD CURRENT (mA)
0.1
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
90
100
0.1
1
10
100
1000
10000
100000
1 10 100 1000
3499 G02
V
IN
= 3V
V
IN
= 2.4V
V
IN
= 1.8V
POWER LOSS
EFFICIENCY
INPUT VOLTAGE (V)
1.8
0
Burst Mode OUTPUT CURRENT THRESHOLD (mA)
10
20
30
40
60
2.3
2.8 3.3 3.8
3499 G05
4.3 4.8
50
V
OUT
= 5V
V
IN
(V)
1.5
OUTPUT CURRENT (mA)
400
500
600
5.5
3499 G06
300
200
0
2.5
3.5
4.5
100
800
700
V
OUT
= 3.3V
V
OUT
= 5V
V
IN
> V
OUT
V
IN
> V
OUT
V
IN
(V)
1.5
0
INPUT CURRENT (µA)
20
60
80
100
200
140
2.5
3.5
3499 G07
40
160
180
120
4.5
5.5
V
OUT
= 3.3V
V
OUT
= 5V
TEMPERATURE (°C)
–50
0
Burst Mode QUIESCENT CURRENT (µA)
5
10
15
20
30
–25
0 25 50
3499 G08
75 100
25
Current Limit Accuracy
vs Temperature
2-Cell to 3.3V Efficiency
vs Load Current (LTC3499 Only)
Burst Mode Output Current
Threshold vs Input Voltage
(LTC3499 Only)
Maximum Output Current
Capability vs V
IN
No Load Input Current vs V
IN
(LTC3499 Only)
Burst Mode Quiescent Current
vs Temperature (LTC3499 Only)
2-Cell to 5V Efficiency
vs Load Current (LTC3499 Only)
Li-Ion to 5V Efficiency
vs Load Current (LTC3499 Only)
2-Cell to 5V Efficiency
vs Load Current (LTC3499B Only)
T
A
= 25°C, unless otherwise noted.