LTC3526 Linear Technology, LTC3526 Datasheet - Page 3

• Manufacturer Part Number: LTC3526
• Description: 500mA 1MHz Synchronous Step-Up DC/DC Converters
• Manufacturer: Linear Technology

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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 LTC3526E is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Specifi cation is guaranteed by design and not 100% tested in
production.
TYPICAL PERFORMANCE CHARACTERISTICS
100
100
90
80
70
60
50
40
30
20
10
20
10
90
80
70
60
50
40
30
0
0.01
0
0.01
Effi ciency vs Load Current and V
for V
Effi ciency vs Load Current and V
for V
OUT
OUT
0.1
0.1
LOAD CURRENT (mA)
= 1.8V (LTC3526)
LOAD CURRENT (mA)
= 5V (LTC3526)
V
V
V
IN
IN
IN
1
1
= 1.0V
= 1.2V
= 1.5V
PLOSS AT V
PLOSS AT V
PLOSS AT V
PLOSS AT V
PLOSS AT V
PLOSS AT V
PLOSS AT V
10
10
100
V
V
V
V
100
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
= 1.0V
= 1.2V
= 1.5V
= 1.2V
= 2.4V
= 3.6V
= 4.2V
= 1.2V
= 2.4V
= 3.6V
= 4.2V
3526 G01
3526 G03
1000
1000
IN
IN
100
10
1
0.1
0.01
1000
1000
100
10
1
0.1
0.01
100
90
80
70
60
50
40
30
20
10
0
0.01
400
350
300
250
200
150
100
50
0
0.5
Effi ciency vs Load Current and V
for V
V
Maximum Output Current vs V
OUT
1.0
0.1
OUT
V
= 1.8V
OUT
LOAD CURRENT (mA)
1.5
= 3.3V (LTC3526)
= 2.5V
V
V
V
V
IN
IN
IN
IN
1
V
2.0
= 1.2V
= 1.8V
= 2.4V
= 3.0V
OUT
V
= 3.3V
IN
2.5
PLOSS AT V
PLOSS AT V
PLOSS AT V
PLOSS AT V
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 specifi ed 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
60°C/W.
10
(V)
V
3.0
OUT
100
= 5V
3.5
IN
IN
IN
IN
L = 4.7μH
= 1.2V
= 1.8V
= 2.4V
= 3.0V
3526 G02
4.0
3526 G05
1000
IN
IN
4.5
1000
100
10
1
0.1
0.01
LTC3526/LTC3526B
100
1000
80
70
50
10
90
60
40
30
20
100
10
0.5
0.85
Minimum Load Resistance
During Start-Up vs V
No-Load Input Current vs V
1.0
V
OUT
1.5
0.95
V
= 5V
OUT
V
OUT
2.0
= 3.3V
V
V
= 2.5V
OUT
IN
V
2.5
1.05
IN
(V)
= 1.8V
(V)
3.0
IN
3.5
1.15
IN
4.0
3526 G04
3526 G06
3526bfb
3
4.5
1.25