L7820CV

Overview

The L7820CV is a fixed positive linear voltage regulator manufactured by STMicroelectronics, delivering a nominal output of 20 V with a maximum continuous load current of 1.5 A. It operates within an input voltage range up to 35 V and maintains regulation across a junction temperature range of 0°C to 125°C. The device incorporates comprehensive internal protection mechanisms, including thermal overload shutdown and safe area compensation, ensuring reliable operation under varying load conditions.

Feature Summary

• Integrated thermal overload protection prevents damage during excessive power dissipation
• Internal safe area compensation ensures stable performance under high voltage and current stress
• Output transistor short-circuit protection safeguards the component against fault conditions

Applications

• General-purpose positive regulated power supplies
• Local on-card regulation for distributed power systems
• Equipment requiring stable 20 V DC supply rails

Procurement Notes

Verify the specific manufacturer marking and datasheet revision when sourcing components. Confirm that the TO-220 package matches the required thermal management strategy. Ensure the supplier provides traceability documentation consistent with industrial standards. Cross-reference part numbers carefully as suffixes may indicate variations in packaging or testing criteria.

Selection Notes

Select this component when a fixed 20 V output is required with moderate current demands up to 1.5 A. Consider the thermal resistance of the TO-220 package and the necessity of a heatsink based on the input-output voltage differential. Evaluate the dropout voltage requirements relative to the minimum input voltage available in the design.

Part Context

This component belongs to the L78xx family of three-terminal positive linear regulators produced by STMicroelectronics. The series offers a range of fixed output voltages, providing a standardized solution for simple voltage regulation tasks. The L7820CV specifically targets applications needing a 20 V rail, sharing common pinouts and protection features with other members of the series.

Replacement Considerations

Compatible substitutes include the LM7820 from Texas Instruments and the MC78M20 from ON Semiconductor. Verify pin compatibility and thermal characteristics before substitution. Ensure the alternative component meets the same 1.5 A current rating and 35 V maximum input voltage specifications.