Datasheet

LTC3526L-2/LTC3526LB-2
3
3526lb2fa
Typical perForMance characTerisTics
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3526LE-2/LTC3526LBE-2 are guaranteed to meet
performance specifications from 0°C to 85°C. Specifications over –40°C to
85°C operating temperature range are assured by design, characterization
and correlation with statistical process controls.
Note 3: Specification is guaranteed by design and not 100% tested in
production.
Note 4: Current measurements are made when the output is not switching.
Note 5: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may result in device degradation or failure.
Note 6: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
102°C/W.
Efficiency vs Load Current and V
IN
for V
OUT
= 1.8V (LTC3526L-2)
Efficiency vs Load Current and V
IN
for V
OUT
= 3.3V (LTC3526L-2)
Efficiency vs Load Current and V
IN
for V
OUT
= 5V (LTC3526L-2)
No-Load Input Current vs V
IN
(LTC3526L-2)
Maximum Output Current vs V
IN
Minimum Load Resistance
During Start-Up vs V
IN
LOAD CURRENT (mA)
0.01
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
0.1 1 10 100 1000
3526lb2 G01
30
20
10
0
90
100
1
10
100
0.1
0.01
1000
V
IN
= 0.9V
V
IN
= 1.2V
V
IN
= 1.5V
PLOSS AT V
IN
= 0.9V
PLOSS AT V
IN
= 1.2V
PLOSS AT V
IN
= 1.5V
LOAD CURRENT (mA)
0.01
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
0.1 1 10 100 1000
3526lb2 G02
30
20
10
0
90
100
1
10
100
0.1
0.01
1000
V
IN
= 1.2V
V
IN
= 1.8V
V
IN
= 2.4V
V
IN
= 3.0V
PLOSS AT V
IN
= 1.2V
PLOSS AT V
IN
= 1.8V
PLOSS AT V
IN
= 2.4V
PLOSS AT V
IN
= 3.0V
V
IN
(V)
0.5
I
IN
(µA)
60
70
80
4.5
3526lb2 G03
50
40
10
1.5
2.5
3.5
1.0
2.0
3.0
4.0
30
20
100
90
V
OUT
= 3.3V
V
OUT
= 5V
V
OUT
= 2.5V
V
OUT
= 1.8V
LOAD CURRENT (mA)
0.01
40
EFFICIENCY (%)
POWER LOSS (mW)
50
60
70
80
0.1 1 10 100 1000
3526lb2 G04
30
20
10
0
90
100
1
10
100
0.1
1000
V
IN
= 1.2V
V
IN
= 2.4V
V
IN
= 3.6V
V
IN
= 4.2V
PLOSS AT V
IN
= 1.2V
PLOSS AT V
IN
= 2.4V
PLOSS AT V
IN
= 3.6V
PLOSS AT V
IN
= 4.2V
V
IN
(V)
0.5
I
OUT
(mA)
200
300
4.5
3526lb2 G05
100
0
1.5
2.5
3.5
1.0
2.0
3.0
4.0
400
150
250
50
350
V
OUT
= 3.3V
V
OUT
= 5V
V
OUT
= 2.5V
V
OUT
= 1.8V
L = 2.2µH
V
IN
(V)
0.65
LOAD (Ω)
100
1000
10000
1.050.950.75 1.150.85
3526lb2 G06
10
V
OUT
= 3.3V
elecTrical characTerisTics
T
A
= 25°C, unless otherwise noted.