LTC3528B Linear Technology Corporation, LTC3528B Datasheet - Page 3

• Manufacturer Part Number: LTC3528B
• Description: 1MHz Synchronous Step-Up DC/DC Converters
• Manufacturer: Linear Technology Corporation

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TYPICAL PERFORMANCE CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
PARAMETER
SHDN Input High Voltage
SHDN Input Low Voltage
SHDN Input Current
PGOOD Threshold Percentage
PGOOD Low Voltage
PGOOD Leakage Current
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 LTC3528E 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.
temperature range of –40°C to 85°C, otherwise specifi cations are at T
100
90
80
70
60
50
40
30
20
10
0
0.01
Effi ciency vs Load Current and V
for V
EFFICIENCY
OUT
0.1
= 1.8V (LTC3528)
LOAD CURRENT (mA)
1
CONDITIONS
V
Referenced to Feedback Voltage Falling
I
V
V
PGOOD
10
SHDN
OUT
PGOOD
= 1.6V, I
POWER
LOSS
= 1.2V
= 1mA
V
V
V
100
= 5.5V
IN
IN
IN
= 1V
= 1.2V
= 1.5V
3528 G01
PGOOD
IN
1000
1000
100
10
1
0.1
0.01
= 1mA
The
●
denotes the specifi cations which apply over the specifi ed operating
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
76°C/W.
Note 7: The IC is tested in a feedback loop to make the measurement.
A
= 25°C. V
100
90
80
70
60
50
40
30
20
10
0
0.01
Effi ciency vs Load Current and V
for V
IN
= 1.2V, V
(T
EFFICIENCY
OUT
A
0.1
= 25°C unless otherwise noted)
= 3V (LTC3528)
LOAD CURRENT (mA)
LTC3528/LTC3528B
OUT
1
= 3.3V, unless otherwise noted.
10
POWER
LOSS
MIN
0.88
–7
V
V
V
100
IN
IN
IN
= 1V
= 1.5V
= 2.4V
3528 G26
0.05
0.05
0.01
TYP
–10
0.3
IN
1000
1000
100
10
1
0.1
0.01
MAX
0.25
–13
0.1
0.2
1
1
UNITS
3528fa
3
μA
μA
%
V
V
V
V