L4940D2T12-TR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The L4940D2T12-TR is a fixed-output linear low-dropout voltage regulator manufactured by STMicroelectronics. It provides a stable 12V output with a maximum continuous current of 1.5A. The device features a maximum input voltage rating of 17V and operates within an extended temperature range from -40°C to +150°C. Packaged in a surface-mount D2PAK (TO-263-3) format, it exhibits a typical dropout voltage of 0.9V at full load. Internal protection mechanisms include thermal shutdown, short-circuit limiting, and reverse polarity protection.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrated thermal shutdown and short-circuit protection for enhanced operational safety
• Reverse polarity protection capability prevents damage from incorrect power connections
• Low quiescent current consumption extends battery life in portable applications

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Battery-powered equipment requiring efficient voltage regulation
• Industrial control systems utilizing positive three-terminal regulators
• Consumer electronics needing stable 12V power supply rails

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'D2T12' confirms the 12V fixed output variant. Confirm the '-TR' designation indicates tape-and-reel packaging suitable for automated assembly processes. Ensure compatibility with RoHS3 standards if environmental compliance is required for the target market.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 12V output is required with up to 1.5A load capacity. The D2PAK package offers superior thermal dissipation compared to smaller SMD packages. Consider the 17V maximum input limit when designing circuits with higher supply voltages.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the L4940 series of very low drop voltage regulators. The series includes variants with different fixed output voltages such as 5V and 8.5V. All members share similar internal architectures and protection features while differing primarily in their regulated output levels.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

L4940D2T5-TR: Provides 5V output instead of 12V; otherwise shares identical package and current ratings.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the maximum input voltage allowed for this regulator?

The maximum input voltage rating is 17V.

Does the L4940D2T12-TR include reverse polarity protection?

Yes, the device incorporates internal reverse polarity protection circuitry.