L7805CDT-TR

Product Overview

The L7805CDT-TR from STMicroelectronics is a fixed positive linear voltage regulator in a surface-mount DPAK package. It provides a single 5 V output and supports up to 1.5 A of load current, with a maximum input voltage of 35 V. The device includes over-temperature and short-circuit protection and operates from 0°C to 125°C, making it suitable for board-level 5 V rail generation in surface-mount power designs.

Key Features

• Fixed positive output voltage of 5 V with a single regulator output.
• Output current capability of 1.5 A and maximum input voltage of 35 V.
• Typical dropout voltage of 2 V at 1 A, with 8 mA quiescent current.
• 62 dB power supply rejection ratio at 120 Hz.
• Integrated over-temperature and short-circuit protection features.
• Operating temperature range of 0°C to 125°C in a TO-252-3 DPAK surface-mount package.

Applications

• Generating a regulated 5 V rail from a higher DC input in embedded control boards.
• Supplying logic circuits, sensors, or communication modules that require a fixed positive 5 V output.
• Board-level power distribution where a single-output linear regulator with fault protection is required.

Design & Procurement Notes

Designers should account for the thermal dissipation produced by the voltage difference between the input and the fixed 5 V output at the selected load current, especially near the 1.5 A output limit. The dropout value of 2 V at 1 A typical indicates that input-output voltage margin should be evaluated across the 0°C to 125°C operating range. The DPAK package with a tab supports surface-mount thermal management, and the integrated over-temperature and short-circuit protection can help limit stress during abnormal load or fault conditions. For procurement alignment, confirm that the fixed 5 V output, 1.5 A current capability, and TO-252-3 DPAK surface-mount package match the board layout and assembly requirements.