LTC3542-1_15 Datasheet, PDF (3/16 Pages) Linear Technology – 500mA, 2.25MHz 2.8V Output Synchronous Step-Down DC/DC Converter

LTC3542-1
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 unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_UVLO
V_RUN
Undervoltage Lockout Threshold
RUN Threshold
V_IN Rising
V_IN Falling
2.0
2.3
V
1.8
1.9
V
l 0.3
1.5
V
I_RUN
RUN Leakage Current
l
±0.01 ±1
μA
V_MODE/SYNC
MODE/SYNC Threshold
l 0.3
1.2
V
I_MODE/SYNC
MODE/SYNC Leakage Current
l
±0.01 ±1
μA
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
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: T_J is calculated from the ambient temperature T_A and power
dissipation P_D according to the following formula:
T_J = T_A + (P_D) • (θ_JA).
35421f
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