L78M08CV-DG

Overview

The L78M08CV-DG is a three-terminal positive linear voltage regulator from the STMicroelectronics L78M series. It provides a fixed output voltage of 8 V with a maximum output current of 500 mA. The device accepts an input voltage range typically between 10 V and 35 V, requiring a minimum dropout voltage of approximately 2 V at rated load. It is housed in a TO-220FP package and operates within a junction temperature range of -40 °C to +125 °C.

Feature Summary

• Fixed 8 V output regulation
• Integrated thermal overload protection
• Short circuit current limiting
• Safe area protection

Applications

• Local on-card regulation for electronic circuits
• General-purpose power supply units
• Battery charging systems
• Negative regulators with external components

Procurement Notes

Verify the specific suffix 'DG' against official STMicroelectronics documentation to confirm package type and tape-and-reel availability. Ensure the component matches the standard L78Mxx family specifications for current and voltage ratings before integration into designs.

Selection Notes

Select this component when a fixed 8 V output is required with up to 500 mA capacity. Consider the TO-220FP package for through-hole mounting and adequate heat dissipation. Verify input voltage stability to maintain regulation within the specified dropout limits.

Part Context

This part belongs to the L78M series of three-terminal positive regulators. The series offers various fixed output voltages including 5, 6, 8, 9, 12, 15, and 24 V. These devices are designed for local regulation applications, eliminating distribution problems associated with single-point regulation systems.

Replacement Considerations

L78M08CT (onsemi) is a documented substitute with identical 8 V output and 500 mA current rating in a TO-220-3 package.