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The LM1117DT-1.8/NOPB is a fixed-output low-dropout linear regulator from Texas Instruments, providing a stable 1.8 V output with a maximum load current of 800 mA. It operates within an input voltage range up to 15 V and features a typical dropout voltage of 1.2 V at full load. The device utilizes a TO-252 (DPAK) surface-mount package and supports junction temperatures from 0°C to +125°C. Internal protections include current limiting and thermal shutdown, while accuracy is maintained via a Zener-trimmed bandgap reference.
Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per the manufacturer's latest documentation. Confirm that the 'DT' designation strictly corresponds to the TO-252 package variant. Ensure the component matches the original Texas Instruments manufacturing source rather than third-party distributors or alternative manufacturers.
Select this component when a fixed 1.8 V rail is required with up to 800 mA capacity in a compact surface-mount form factor. Consider the 1.2 V dropout requirement to ensure sufficient headroom between input and output voltages across the entire operating temperature range. Evaluate thermal dissipation needs based on the TO-252 package thermal resistance characteristics.
This part belongs to the LM1117 family of 800 mA low-dropout linear regulators. It serves as a legacy solution for general-purpose power management applications requiring simple, reliable voltage regulation. The series offers both adjustable and fixed voltage options, with the LM1117DT-1.8/NOPB specifically targeting the 1.8 V logic supply requirement.
Texas Instruments recommends the TLV1117 as a newer drop-in alternative. For improved functionality in SOT-223 packages, the TLV761 is suggested.