L78S24CV

Overview

The L78S24CV is a three-terminal positive linear voltage regulator from the STMicroelectronics L78Sxx series. It provides a fixed output voltage of 24 V with a maximum output current capability of 2 A when adequate heat sinking is provided. The device accepts a maximum input voltage of 40 V and operates within a temperature range of 0°C to +150°C. Key electrical characteristics include a static current of 8 mA, line regulation of 480 mV, and load regulation of 480 mV. It utilizes a TO-220 package for through-hole mounting.

Feature Summary

• Integrates internal current limiting, thermal shutdown, and safe area protection mechanisms.
• Provides local on-card regulation to eliminate distribution problems associated with single-point regulation.
• Capable of delivering high output currents up to 2 A with appropriate thermal management.

Applications

• Local on-card voltage regulation in electronic circuits
• General-purpose power supply units requiring fixed 24 V output
• Industrial equipment power distribution systems

Procurement Notes

Verify the specific package variant matches the required footprint, as the L78S series typically uses TO-220 or TO-3 packages. Confirm that the thermal requirements for 2 A operation are met by the system design, as performance depends on adequate heat sinking. Ensure the application voltage does not exceed the 40 V maximum input rating to prevent device damage.

Selection Notes

Select this component when a robust 2 A fixed 24 V linear regulation solution is needed. It is suitable for applications where simplicity and built-in protection features are prioritized over efficiency. Consider thermal dissipation capabilities carefully, as linear regulators dissipate significant power as heat under high load conditions.

Part Context

The L78S24CV belongs to the L78Sxx family of 2 A positive voltage regulators. This series complements the standard L78xx (1.5 A) and L78Mxx (500 mA) families, offering higher current capacity in similar three-terminal configurations. It shares core protection features with the broader L78 series but is optimized for higher power applications.

Replacement Considerations

Compatible substitutes include other L78S24 variants from different manufacturers, such as MC78S24 or LM340T-24, provided pinouts and thermal characteristics align. Verify that replacement parts support the 2 A output current and 40 V input voltage specifications.