LF50ABDT-TR

Overview

The LF50ABDT-TR is a fixed-output linear regulator from STMicroelectronics, providing a stable 5 V DC output with a maximum continuous current of 0.5 A. It operates within an input voltage range up to 16 V and features a low dropout voltage of 0.7 V at full load. The device incorporates internal protection mechanisms including overcurrent limiting and thermal shutdown. It is housed in a surface-mount DPAK (TO-252-3) package with three pins and supports an operating temperature range from -40 °C to +125 °C.

Feature Summary

• Integrated overcurrent and thermal shutdown protection for enhanced circuit reliability
• Low quiescent current design suitable for power-sensitive applications
• Fixed 5 V output configuration ensuring consistent voltage regulation

Applications

• Battery-powered electronic systems requiring efficient voltage regulation
• Low-noise power supply circuits for sensitive analog components
• General-purpose DC-to-DC conversion in portable devices

Procurement Notes

Verify the specific suffix 'AB' against official datasheets to confirm exact electrical tolerances and performance grades, as variations exist within the LF50 family. Ensure the DPAK package footprint matches the target PCB layout. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a fixed 5 V output is required with moderate current capability up to 500 mA. The DPAK package offers a balance between thermal dissipation and board space efficiency compared to smaller SOT packages. Consider the 16 V maximum input rating to ensure compatibility with upstream power sources. Evaluate the thermal resistance of the PCB copper area to maintain junction temperatures within the specified -40 °C to +125 °C operating range under expected load conditions.

Part Context

This device belongs to the LFxx series of very low drop regulators manufactured by STMicroelectronics. The series provides various fixed output voltages optimized for low-power and battery-operated applications. The LF50 variant specifically targets 5 V regulation needs, leveraging the LDO topology to minimize voltage loss between input and output terminals while maintaining stability without external compensation components.

Replacement Considerations

NCP5501DT50RKG is a documented alternative offering similar 5 V output and 0.5 A current capacity in a compatible DPAK package.