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LM2734YMK is listed in the Voltage Regulators - DC DC Switching Regulators range at ChipApex. The manufacturer field lists National Semiconductor. Its product description is IC REG BUCK ADJ 1A TSOT23-6. Review the specifications below when checking this part for your BOM.
The LM2734YMK is a synchronous step-down DC-DC regulator manufactured by Texas Instruments, which acquired National Semiconductor. It operates with an input voltage range of 3V to 20V and provides a maximum output current of 1A. The device features a fixed switching frequency of 550kHz and supports adjustable output voltages from 800mV to 18V. It is housed in a SOT-23-THIN-6 package and is rated for operation between -40°C and +125°C junction temperature.
Verify the manufacturer origin as Texas Instruments due to the acquisition of National Semiconductor. Confirm the specific suffix indicates the correct package type and thermal rating. Ensure compatibility with the required input voltage range and load current specifications before integration into the final design.
Select this component when a compact solution is required for moderate current loads up to 1A. The 550kHz frequency allows for smaller passive components compared to lower frequency alternatives. Consider the SOT-23-THIN footprint constraints and thermal dissipation requirements for the specific application environment.
This part belongs to the LM2734 family of synchronous step-down converters. It serves as a legacy option from the National Semiconductor portfolio now managed by Texas Instruments. Similar variants exist with different switching frequencies or automotive qualifications within the same product line.
LM2734YMKX/NOPB is a confirmed equivalent part number offering identical electrical characteristics and pinout configuration.
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