LF50CPT

Overview

The LF50CPT-TR is a fixed-output positive low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 5 V output with a maximum continuous current of 500 mA. The device features a fixed output type and operates within an input voltage range up to 16 V. Key electrical specifications include a typical dropout voltage of 200 mV, a maximum of 1 V, and a line regulation of 25 mV. The quiescent current is specified at 50 uA. The unit offers high accuracy with a voltage regulation tolerance of ±2%. It is housed in a surface-mount PPAK (TO-252-5) package with five pins.

Feature Summary

• Provides a fixed 5 V regulated output for power supply applications
• Supports up to 500 mA load current with low dropout characteristics
• Includes internal protection against short circuits and thermal overload
• Operates reliably across a wide industrial temperature range

Applications

• General purpose power management in electronic circuits
• Battery-powered systems requiring efficient voltage regulation
• Embedded systems and microcontroller power supplies
• Industrial control equipment power distribution

Procurement Notes

Verify the exact part number suffix, as LF50CPT-TR indicates tape-and-reel packaging. Confirm RoHS compliance status through official documentation before integration. Ensure the selected package variant matches the PCB footprint requirements. Cross-reference the manufacturer's latest datasheet for any updates on pin configurations or recommended operating conditions to guarantee design compatibility.

Selection Notes

Select this component when a stable 5 V rail is required with moderate current demands up to 500 mA. The low quiescent current makes it suitable for battery-operated devices where efficiency is critical. Consider the thermal performance in the PPAK package for heat dissipation needs. Verify that the input voltage remains within the 16 V limit and that the dropout voltage meets the system's headroom requirements under all load conditions.

Part Context

This device belongs to the LF series of low-dropout regulators from STMicroelectronics. It is categorized under PMIC - Power Management ICs. The product is designed for surface-mount assembly, facilitating automated manufacturing processes. It serves as a solution for converting higher unregulated voltages into precise, stable DC levels for sensitive downstream electronics.

Replacement Considerations

Check for direct cross-reference part numbers from STMicroelectronics or qualified second-source manufacturers. Ensure any substitute maintains the same 5 V output, 500 mA current rating, and TO-252-5/PPAK package dimensions. Verify that electrical parameters such as dropout voltage and line regulation are equivalent or superior to avoid redesigning the power stage.