L4940D2T5-TR

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

The L4940D2T5-TR is a fixed-output linear low-dropout voltage regulator manufactured by STMicroelectronics. It provides a fixed 5V output with a maximum continuous current of 1.5A. The device supports a maximum input voltage of 17V and operates within a junction temperature range of -40°C to 150°C. Key electrical parameters include a typical dropout voltage of 0.9V at full load, a static current of 8mA, and a power supply rejection ratio (PSRR) of 68dB at 120Hz. It is housed in a surface-mount D2PAK package.

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

• Integrates internal current limiting, thermal shutdown, and safe area protection for robust operation under fault conditions.
• Features a very low dropout voltage characteristic, optimizing efficiency for battery-powered applications.
• Provides precise fixed output voltage regulation suitable for industrial and consumer electronics.

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

• Battery-powered equipment requiring efficient voltage regulation.
• Industrial control systems and general-purpose power supplies.
• Consumer electronic devices utilizing standard 5V logic levels.

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

Verify the specific suffix 'D2T5' confirms the 5V fixed output variant, as the L4940 series includes other voltage options. Ensure the 'TR' designation matches the required tape-and-reel packaging format for automated assembly processes. Cross-reference the manufacturer's latest datasheet to confirm compliance with RoHS3 standards and any recent product change notices affecting the D2PAK package or lead composition.

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

Select this component when a fixed 5V rail is required with up to 1.5A load capacity in a compact surface-mount form factor. Consider the 17V maximum input rating and 0.9V dropout voltage to ensure adequate headroom for the specific application's input source. Evaluate thermal dissipation requirements based on the D2PAK package's thermal characteristics and the expected ambient operating temperature range.

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

This part belongs to the L4940 series of three-terminal positive regulators from STMicroelectronics. The series is designed for wide-ranging industrial and consumer applications, offering both TO-220 and D²PAK package options. The L4940 family is characterized by its ability to maintain regulation with minimal input-to-output voltage difference, making it distinct from standard linear regulators in efficiency-conscious designs.

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

Compatible alternatives within the same series include L4940D2M5-TR (5V, D2PAK) and L4940D2T12-TR (12V, D2PAK). For through-hole implementations, the L4940V5 serves as a functional equivalent in the TO-220 package. Verify pinout compatibility and thermal performance when substituting.