L7912

Overview

The L7912 is a negative fixed linear voltage regulator IC manufactured by Lumimax Optoelectronic Technology. It provides a stable -12V output with a maximum current capacity of 1.5A. The device features internal protection mechanisms including over-current and thermal overload shutdown to ensure reliability under varying load conditions. It operates with a quiescent current of approximately 3 mA and offers a power supply rejection ratio (PSRR) of 54 dB at 120 Hz. The component is housed in a TO-220 package, suitable for through-hole mounting in industrial and commercial electronic circuits requiring regulated negative voltage supplies.

Feature Summary

• Provides a fixed negative output voltage for stable power regulation
• Supports up to 1.5A output current capability
• Includes internal over-current and thermal overload protection
• Maintains constant output despite input voltage or load variations

Applications

• Industrial control systems requiring negative rail power
• Commercial electronic equipment power supplies
• Audio amplifier biasing circuits
• General-purpose linear regulation applications

Procurement Notes

Verify the exact suffix designation against official Lumimax documentation, as variants may exist. Confirm package type and pinout compatibility with your PCB layout. Ensure thermal management solutions are adequate for the expected operating current and ambient temperature conditions. Cross-reference specifications with the latest datasheet to confirm protection feature thresholds.

Selection Notes

Select this component when a fixed -12V output is required with moderate current demands. Consider the TO-220 package size for thermal dissipation needs. Evaluate the PSRR requirements for noise-sensitive applications. Compare internal protection features against system safety standards. Verify input voltage range compatibility with the source supply.

Part Context

This part belongs to the family of negative linear voltage regulators offered by Lumimax Optoelectronic Technology. These regulators are designed to maintain a constant output voltage regardless of input fluctuations or load changes. The series supports various industrial and commercial applications where stable negative voltage rails are essential for circuit operation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative manufacturers' parts based on electrical specifications and pinout configuration before substitution.