MC79M08CTG

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

The MC79M08CTG is a fixed-output negative voltage regulator from the MC79M00 series, manufactured by onsemi. It provides a nominal output voltage of -8.0 V with a maximum output current of 500 mA. The device operates within an input voltage range of -10.5 V to -25 V and features line regulation of 80 mV and load regulation of 100 mV at TJ = 25 °C. It employs internal thermal overload protection and short-circuit current limiting for rugged operation. The component is housed in a TO-220-3 package (Case 221AB) with a junction-to-case thermal resistance of 5.0 °C/W. It supports an operating temperature range of 0 °C to +125 °C.

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

• Internal thermal overload protection prevents damage during overheating conditions.
• Short-circuit current limiting safeguards the device against output faults.
• Output transistor safe-area compensation ensures stability under various loads.
• Requires no external components for basic fixed-voltage regulation.

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

• Negative power supply rails in electronic circuits
• Complementary positive voltage regulation systems
• General-purpose linear voltage regulation

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

Verify the specific suffix 'CTG' indicates a Pb-Free package and a 0 °C to +125 °C operating range. Confirm that the TO-220-3 pinout matches the application schematic, as Pin 1 is Ground, Pin 2 is Input, and Pin 3 is Output. Ensure adequate heatsinking is provided if output currents exceed typical ratings or ambient temperatures are high. Check for discontinued status updates from the manufacturer before finalizing procurement plans.

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

Select this component when a stable negative voltage rail is required for analog or digital circuits. The MC79M08CTG is suitable for applications needing up to 500 mA of current. Consider the dropout voltage requirements relative to the minimum input voltage. Compare with other series members like MC79M05 or MC79M12 if different voltage levels are needed. Evaluate thermal management needs based on the power dissipation capabilities of the TO-220 package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The MC79M08CTG belongs to the MC79M00 series of three-terminal negative fixed voltage regulators. This series is designed as a complement to the popular MC78M00 positive regulator family. The devices are intended for general-purpose applications requiring reliable negative voltage generation. The series includes multiple voltage options such as -5.0 V, -12 V, and -15 V, all sharing similar protection features and packaging options.

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

Direct replacements include other MC79M08 variants such as MC79M08BTG or MC79M08CDT, noting differences in temperature ranges and packages. Cross-reference with MC79M08BDTRKG for surface mount alternatives. Verify compatibility with existing PCB layouts due to potential package differences between TO-220 and DPAK.