LTC3525D-3.3_15 Datasheet, PDF (4/14 Pages) Linear Technology – 400mA Micropower Synchronous Step-Up DC/DC Converter with Pass Through Mode

LTC3525D-3.3
Typical Performance Characteristics T_A = 25°C unless otherwise noted.
Maximum Output Current vs V_IN
(for V_OUT to Drop 2.5%)
300
250
200
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)
3525d33 G01
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
3525d33 G04
Light Load Burst Frequency
vs Load
40
35
30
25
20
C_OUT = 10µF
15
10
C_OUT = 22µF
5
0
0.1
1
LOAD (mA)
10
3525d33 G12
Maximum Startup Load vs V_IN
(Resistive Load)
250
200
150
100
50
0
0.5 1.0 1.5 2.0 2.5 3.0
V_IN (V)
3525d33 G02
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)
3525d33 G06
V_OUT Variation vs Temperature
(Normalized to 25°C)
0.40
0.30
0.20
0.10
–0.00
–0.10
–0.20
–0.30
–0.40
–50 –25
0 25 50 75
TEMPERATURE (^oC)
100 125
3525d33 G13
4
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No-Load Input Current vs V_IN
50
45
40
35
30
25
20
15
10
5
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
V_IN (V)
3525d33 G03
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)
3525d33 G07
Start-Up Delay Coming Out of
Shutdown
120
100
80
60
40
20
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
V_IN (V)
3525d33 G14
3525d33fb