Datasheet

LTC3528/LTC3528B
4
3528fd
LOAD CURRENT (mA)
0.01
80
90
100
100
3528 G03
70
60
0.1 1 10 1000
50
40
30
100
1000
10
1
0.1
EFFICIENCY (%)
POWER LOSS (mW)
V
IN
= 1.2V
V
IN
= 2.4V
V
IN
= 3.6V
V
IN
= 4.2V
EFFICIENCY
POWER
LOSS
No-Load Input Current vs V
IN
(LTC3528)
Maximum Output Current vs V
IN
Minimum Load Resistance During
Start-Up vs V
IN
Start-Up Delay Time vs V
IN
Burst Mode Threshold Current
vs V
IN
Efficiency vs Load Current and V
IN
for V
OUT
= 5V (LTC3528)
Efficiency vs Load Current and V
IN
for V
OUT
= 3.3V (LTC3528)
LOAD CURRENT (mA)
0.01
80
90
100
100
3528 G02
70
60
0.1 1 10 1000
50
40
30
100
1000
10
1
0.1
0.01
EFFICIENCY (%)
POWER LOSS (mW)
V
IN
= 1.2V
V
IN
= 1.8V
V
IN
= 2.4V
V
IN
= 3V
EFFICIENCY
POWER
LOSS
V
IN
(V)
1
10
I
IN
(µA)
30
50
70
90
110
130
2 3 4 5
3528 G04
V
OUT
= 1.8V
V
OUT
= 3V
V
OUT
= 3.3V
V
OUT
= 5V
V
IN
(V)
1
I
OUT
(mA)
700
2.5
3528 G05
400
200
1.5 2 3
100
0
800
600
500
300
3.5 4 4.5
V
OUT
= 1.8V
V
OUT
= 3.3V
V
OUT
= 5V
V
IN
(V)
0.7
10
R
LOAD
(Ω)
1000
100
10000
0.8 0.9 1
3528 G06
V
IN
(V)
1
DELAY (µs)
120
2.5
3528 G07
90
70
1.5 2 3
60
50
130
110
100
80
3.5 4 4.5
V
IN
(V)
1
I
OUT
(mA)
20
30
1.4
3528 G08
10
0
1.1
1.2
1.3
1.5
40
V
OUT
= 1.8V
ENTER BURST
EXIT BURST
V
IN
(V)
1
I
OUT
(mA)
20
30
3528 G09
10
0
1.5
V
OUT
= 3V
2
2.5
50
40
ENTER BURST
EXIT BURST
V
IN
(V)
1
0
I
OUT
(mA)
20
40
60
1.5 2
3528 G10
2.5 3
V
OUT
= 3.3V
ENTER BURST
EXIT BURST
TYPICAL PERFORMANCE CHARACTERISTICS
(T
A
= 25°C unless otherwise noted)
Burst Mode Threshold Current
vs V
IN
Burst Mode Threshold Current
vs V
IN