LTC3525-3_15 Datasheet, PDF (6/16 Pages) Linear Technology – 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect

LTC3525-3/
LTC3525-3.3/LTC3525-5
Typical Performance Characteristics T_A = 25°C unless otherwise noted.
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
LTC3525-5 Load Regulation
2.5
V_IN = 3.6V
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
50
100
150
200
LOAD (mA)
3525 G10
Switching Frequency vs V_IN
1200
L = 10µH
1100
1000
LTC3525-5
900
800
700
LTC3525-3.3
600
500
400
300
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
V_IN (V)
3525 G11
Light Load Burst Frequency
vs Load
40
V_OUT Variation vs Temperature
(Normalized to 25°C)
0.40
Startup Delay Coming Out of
Shutdown
120
35
0.30
100
30
0.20
80
25
0.10
20
–0.00
60
C_OUT = 10µF
15
–0.10
40
10
–0.20
C_OUT = 22µF
20
5
–0.30
0
0.1
1
LOAD (mA)
10
3525 G12
–0.40
–50 –25
0 25 50 75
TEMPERATURE (^oC)
100 125
3525 G13
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
V_IN (V)
3525 G14
LTC3525-3.3 Input Current and
V_OUT at Start-Up
LTC3525-3.3 Output Voltage
Ripple
V_IN = 1.2V
V_OUT
1V/DIV
I_OUT
5mA
I_OUT
40mA
50mV/DIV
INPUT
CURRENT
100mA/DIV
500µs/DIV
3525 G15
I_OUT
80mA
V_IN = 1.2V
C_OUT = 10µF
50µs/DIV
3525 G16
3525fc
6
For more information www.linear.com/LTC3525