Datasheet

LTC3533
3
3533fc
For more information www.linear.com/LTC3533
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.
Note2: The LTC3533EDE is guaranteed to meet performance specifications
from 0ºC to 85ºC. Specifications over the –40ºC to 85ºC operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum Duty Cycle Boost (% Switch C On)
Buck (% Switch A On)
l
l
80
100
90 %
%
Minimum Duty Cycle
l
0 %
Frequency Accuracy R
T
= 33.2k
l
0.7 1 1.3 MHz
Error Amp AVOL 80 dB
Error Amp Source Current –20 µA
Error Amp Sink Current 250 µA
Burst Threshold 1 V
Burst Input Current V
BURST
= 5.5V, V
IN
= 5.5V 8 µA
RUN/SS Threshold When IC is Enabled
When EA is at Maximum Boost Duty Cycle
l
0.4 0.7
1.3
1.4 V
V
RUN/SS Input Current V
RUN
= 5.5V 0.01 1 µA
electrical characteristics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.6V, V
OUT
= 3.3V, unless otherwise noted.
Note 3: This IC includes over-temperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when over-temperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may result in device degradation or failure.
Note 4: Current Measurements are performed when the outputs are not
switching.
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