L78M05ABDT-TR

Product Overview

The L78M05ABDT-TR from STMicroelectronics is a positive fixed-output linear voltage regulator supplied in a surface-mount DPAK package. It provides one regulated output at 5 V and is rated for 500 mA of output current. The input voltage is specified up to 35 V, making the device suitable for generating a fixed 5 V rail from a higher-voltage DC source in board-level power sections.

Key Features

• Positive fixed 5 V output from a single regulator
• 500 mA output current rating
• 35 V maximum input voltage
• 6 mA quiescent current
• 62 dB power-supply rejection ratio at 120 Hz
• Over current, over temperature, and short circuit protection
• Operating temperature range of -40°C to 125°C
• Surface-mount TO-252-3, DPAK package with 2 leads plus tab

Applications

• Fixed 5 V supply for digital logic and control circuitry
• Post-regulation of a higher-voltage DC input for low-power peripheral modules
• Surface-mount power rail generation in board layouts using DPAK packages

Design & Procurement Notes

For design use, keep the input voltage within the 35 V maximum and the load within the 500 mA output rating. The fixed 5 V output means no external adjustment network is required, while the 6 mA quiescent current and 62 dB PSRR at 120 Hz should be included in power and noise budgets. The TO-252-3 DPAK package is surface-mount and includes a tab, so PCB land pattern, soldering process, and thermal layout should be planned around the package. The operating temperature range of -40°C to 125°C should be verified against the final board environment.