LTC3526L-2_15 Datasheet, PDF (3/16 Pages) Linear Technology – 550mA 2MHz Synchronous Step-Up DC/DC Converters

LTC3526L-2/LTC3526LB-2
Electrical 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.
Typical Performance Characteristics T_A = 25°C, unless otherwise noted.
Efficiency vs Load Current and V_IN
for V_OUT = 1.8V (LTC3526L-2)
100
1000
90
80
100
70
V_IN = 0.9V
60
V_IN = 1.2V
V_IN = 1.5V
10
50
40
1
30
20
10
0
0.01
PLOSS AT V_IN = 0.9V ^0.1
PLOSS AT V_IN = 1.2V
PLOSS AT V_IN = 1.5V
0.01
0.1
1
10
100 1000
LOAD CURRENT (mA)
3526lb2 G01
Efficiency vs Load Current and V_IN
for V_OUT = 3.3V (LTC3526L-2)
100
1000
90
80
100
70
60
10
50
40
30
20
10
0
0.01
V_IN = 1.2V
V_IN = 1.8V
V_IN = 2.4V
1
V_IN = 3.0V
PLOSS AT V_IN = 1.2V
PLOSS AT V_IN = 1.8V
0.1
PLOSS AT V_IN = 2.4V
PLOSS AT V_IN = 3.0V _0.01
0.1
1
10 100 1000
LOAD CURRENT (mA)
3526lb2 G02
No-Load Input Current vs V_IN
(LTC3526L-2)
100
90
V_OUT = 5V
80
70
V_OUT = 3.3V
60
V_OUT = 2.5V
50
V_OUT = 1.8V
40
30
20
10
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
V_IN (V)
3526lb2 G03
Efficiency vs Load Current and V_IN
for V_OUT = 5V (LTC3526L-2)
100
1000
90
80
100
70
60
50
10
40
30
1
20
10
0
0.01
0.1
0.1
1
10 100 1000
LOAD CURRENT (mA)
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 = 1.2V
V_IN = 2.4V
V_IN = 3.6V
V_IN = 4.2V
3526lb2 G04
Maximum Output Current vs V_IN
400
V_OUT = 3.3V
350
V_OUT = 2.5V
300 ^VOUT ^{= 1.8V}
250
200
V_OUT = 5V
150
100
50
L = 2.2µH
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
V_IN (V)
3526lb2 G05
Minimum Load Resistance
During Start-Up vs V_IN
10000
V_OUT = 3.3V
1000
100
10
0.65
0.75
0.85 0.95
V_IN (V)
1.05 1.15
3526lb2 G06
3526lb2fa