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LTC3542-1 数据表(PDF) 3 Page - Linear Technology

部件名 LTC3542-1
功能描述  500mA, 2.25MHz 2.8V Output Synchronous Step-Down DC/DC Converter
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC3542-1 数据表(HTML) 3 Page - Linear Technology

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LTC3542-1
3
35421f
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. No pin should exceed 6V.
Note 2: The LTC3542-1 is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Failure to solder the Exposed Pad of the package to the PC board
will result in a thermal resistance much higher than 89°C/W.
Note 4: The converter is tested in a proprietary test mode that connects
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VUVLO
Undervoltage Lockout Threshold
VIN Rising
VIN Falling
1.8
2.0
1.9
2.3
V
V
VRUN
RUN Threshold
l
0.3
1.5
V
IRUN
RUN Leakage Current
l
±0.01
±1
μA
VMODE/SYNC
MODE/SYNC Threshold
l
0.3
1.2
V
IMODE/SYNC
MODE/SYNC Leakage Current
l
±0.01
±1
μA
the output of the error amplifier to the SW pin, which is connected to an
external servo loop.
Note 5: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 6: The DFN switch on resistance is guaranteed by correlation to wafer
level measurements.
Note 7: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
TJ = TA + (PD) • (θJA).
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V unless otherwise noted.


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