L78M12ACDT-TR

Product Overview

The L78M12ACDT-TR from STMicroelectronics is a surface-mount linear voltage regulator that provides a fixed positive 12V output from a single regulator channel. The device is supplied in a DPAK package and is intended for board-level regulation where a fixed 12V rail is required at up to 500mA. Its maximum input voltage is 35V, and it includes over-current, over-temperature, and short-circuit protection. The specified operating temperature range is 0°C to 125°C.

Key Features

• Fixed positive 12V output with a single regulator channel
• Output current rating: 500mA
• Maximum input voltage: 35V
• Quiescent current: 6 mA
• Power supply rejection ratio: 55dB at 120Hz
• Integrated protection: over current, over temperature, and short circuit
• Surface-mount DPAK package: TO-252-3, DPAK (2 Leads + Tab), SC-63
• Operating temperature range: 0°C to 125°C

Applications

• Fixed 12V rail regulation for low-current board-level power distribution
• Powering analog or digital circuit blocks that require 12V at up to 500mA
• Single-output 12V regulation in systems with a positive input within the 35V maximum

Design & Procurement Notes

Designers should confirm that the load requires a fixed 12V output and does not exceed 500mA, and that the input voltage remains below the 35V maximum. The fixed output cannot be adjusted, so system voltage requirements should be checked before selection. The 6 mA quiescent current and 55dB PSRR at 120Hz may affect power budget and ripple-sensitive designs. Because the device is a linear regulator, load current and thermal conditions should be evaluated within the specified 0°C to 125°C operating range. Surface-mount layout should follow the TO-252-3, DPAK (2 Leads + Tab), SC-63 package footprint.