L7905C-D2TR

Overview

The L7905C-D2TR is a three-terminal negative linear voltage regulator from the L79xxC series, manufactured by STMicroelectronics. It provides a fixed output voltage of -5 V with an output current capability up to 1.5 A. The device is housed in a D²PAK surface-mount package and features thermal overload protection, short-circuit protection, and output transition SOA protection. It operates within a junction temperature range of 0 to 150 °C and supports a maximum DC input voltage of -35 V for this output voltage level.

Feature Summary

• Provides local on-card regulation to eliminate distribution problems associated with single-point regulation.
• Includes built-in thermal overload protection and short-circuit protection for enhanced reliability.
• Features output transition SOA protection to ensure safe operation under varying load conditions.

Applications

• Split power supplies utilizing complementary positive regulators.
• Local on-card voltage regulation for electronic circuits.
• Negative voltage generation in general-purpose power management systems.

Procurement Notes

Verify that the specific order code matches the required D²PAK package configuration and tape-and-reel packaging format. Confirm compliance with environmental standards such as ECOPACK specifications if applicable. Ensure the supplier documentation references the correct datasheet revision (e.g., Rev 21) to validate electrical characteristics and mechanical dimensions against design requirements.

Selection Notes

Select this component when a fixed negative voltage rail is required for circuit biasing or signal processing. The D²PAK package is suitable for surface-mount assembly where thermal dissipation needs to be managed via PCB copper area or heat sinking. Consider the dropout voltage and quiescent current specifications relative to the available input voltage headroom and system efficiency targets.

Part Context

This part belongs to the L79xxC series of negative voltage regulators, which are designed to complement the L78xx positive regulator series. The series offers multiple fixed output voltages including -5 V, -8 V, -12 V, and -15 V. These devices are widely used in industrial and consumer electronics requiring stable negative power rails.

Replacement Considerations

L7905CD2T-TR