LD1117DT50TR

Overview

The LD1117DT50TR is a positive fixed linear low-dropout regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 5V with a maximum continuous output current of 800mA. The device operates with a maximum input voltage of 15V and features a typical dropout voltage of 1.2V at full load. It incorporates internal thermal overload and short-circuit protection mechanisms. The component is housed in a DPAK (TO-252-3) surface-mount package, suitable for applications requiring efficient power management in compact designs.

Feature Summary

• Provides stable regulated output via an NPN pass transistor architecture
• Includes integrated thermal overload and current limiting protection circuits
• Designed for high efficiency with minimal external component requirements

Applications

• General-purpose power supply regulation
• Battery-powered systems requiring low dropout performance
• Embedded logic and peripheral voltage conditioning

Procurement Notes

Verify the specific suffix DT50TR against official datasheets to confirm the fixed 5V output and DPAK packaging configuration. Ensure compatibility with RoHS3 standards if required by your manufacturing process. Cross-reference the manufacturer part number directly with STMicroelectronics documentation to avoid confusion with similar variants in the LD1117 family that may differ in voltage or package type.

Selection Notes

Select this component when a fixed 5V rail is needed with up to 800mA capacity in a surface-mount format. Consider the thermal dissipation capabilities of the DPAK package relative to your expected load current and ambient temperature. Verify that the input voltage remains within the 15V maximum limit and that the dropout characteristics meet your system's headroom requirements.

Part Context

This part belongs to the LD1117 series of low-dropout positive voltage regulators from STMicroelectronics. The series includes adjustable and fixed voltage versions available in various packages such as SOT-223, SO-8, and TO-220. The DT50TR variant specifically denotes the fixed 5.0V output version packaged in the DPAK form factor, optimized for space-saving and thermal performance in surface-mount applications.

Replacement Considerations

LD1117DT50CTR is a compatible alternative within the same series offering identical electrical specifications and pinout in the DPAK package.