L4940D2T85-TR

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

The L4940D2T85-TR is a three-terminal positive linear regulator from the L4940 series, manufactured by STMicroelectronics. It provides a fixed output voltage of 8.5 V with a maximum continuous output current of 1.5 A. The device utilizes a D2PAK surface-mount package and supports an input voltage up to 17 V. Key electrical characteristics include a typical dropout voltage of 400 mV at 0.5 A and 800 mV at 1.5 A. Quiescent current ranges from 5 mA to 50 mA depending on load conditions.

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

• Integrated thermal shutdown protection prevents damage during overheating events.
• Built-in short-circuit protection limits output current to safe levels.
• Reverse polarity protection safeguards the component against incorrect input connections.

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

• Battery-powered equipment requiring low consumption
• Industrial control systems
• Consumer electronics power supplies

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

Verify the specific ordering code matches the required output voltage and package type. Confirm RoHS compliance status for environmental regulations. Ensure the supplier provides original manufacturer documentation to validate authenticity. Check for any recent product change notices regarding packaging or material composition updates.

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

Select this component when a stable 8.5 V rail is needed with high current capability. The D2PAK package offers efficient heat dissipation for surface-mount designs. Consider the dropout voltage requirements relative to the minimum input supply voltage. Evaluate thermal resistance values to ensure adequate heat sinking in the final enclosure design.

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 5 V, 10 V, and 12 V. These devices are designed for applications where minimizing the voltage difference between input and output is critical for efficiency.

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

Compatible substitutes within the same family include L4940D2T5-TR (5 V), L4940D2T10-TR (10 V), and L4940D2T12-TR (12 V). All share identical pinouts and protection features but differ in regulated output voltage. Verify that the alternative voltage level meets the circuit requirements before substitution.