LTC3525-3.3 Datasheet, PDF (4/12 Pages) Linear Technology – 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect

LTC3525-3.3/LTC3525-5
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C unless otherwise noted.
Maximum Output Current vs V_IN
(for V_OUT to Drop 2.5%)
350
300
250
LTC3525-3.3
200
LTC3525-5
150
100
50
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
V_IN (V)
3525 G01
LTC3525-3.3 Efficiency and Power
Loss vs Load
100
100
90
80
10
EFFICIENCY
70
60
1
POWER LOSS
50
40
30
20
0.01 0.1
1
10
LOAD (mA)
0.1
V_IN = 3V
V_IN = 2.4V
V_IN = 1.2V
0.01
100 1000
3525 G04
Maximum Startup Load vs V_IN
(Resitive Load)
250
LTC3525-5
200
150
LTC3525-3.3
100
50
0
0.5 1.0 1.5 2.0 2.5 3.0
V_IN (V)
3525 G02
LTC3525-5 Efficiency and Power
Loss vs Load
100
1000
90
80
100
70
EFFICIENCY
60
10
50
40
POWER LOSS
1
30
20
10
0
0.01 0.1
1
10
LOAD (mA)
V_IN = 3.6V ^0.1
V_IN = 2.4V
V_IN = 1.2V
0.01
100 1000
3525 G05
No-Load Input Current vs V_IN
50
45
40
35
30
25
LTC3525-5
20
15
10
LTC3525-3.3
5
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
V_IN (V)
3525 G03
LTC3525-3.3 Load Regulation
2.5
V_IN = 1.2V
2.0
1.5
1.0
0.5
C_OUT = 22µF
0
–0.5
C_OUT = 10µF
–1.0
–1.5
–2.0
–2.5
0
10 20 30 40 50 60 70 80
LOAD (mA)
3525 G06
LTC3525-3.3 Load Regulation
2.5
V_IN = 2.4V
2.0
1.5
1.0
0.5
C_OUT = 22µF
0
–0.5
C_OUT = 10µF
–1.0
–1.5
–2.0
–2.5
0
20 40 60 80 100 120 140 160 180
LOAD (mA)
3525 G07
LTC3525-5 Load Regulation
2.5
V_IN = 1.2V
2.0
1.5
1.0
0.5
C_OUT = 22µF
0
–0.5
C_OUT = 10µF
–1.0
–1.5
–2.0
–2.5
0
10 20 30 40 50 60
LOAD (mA)
3525 G08
4
LTC3525-5 Load Regulation
2.5
V_IN = 2.4V
2.0
1.5
1.0
0.5
0
C_OUT = 22µF
–0.5
–1.0
C_OUT = 10µF
–1.5
–2.0
–2.5
0
20 40 60 80 100 120 140
LOAD (mA)
3525 G09
3525f