LM120H-12

Overview

The LM120H-12 is a three-terminal negative voltage regulator from the LM120 series, manufactured by Texas Instruments. It provides a fixed -12 V output with an input voltage range extending up to 40 V. The device supports an output current of 1.5 A and operates within a junction temperature range of -55 °C to +150 °C. It features internal thermal overload protection and short-circuit current limiting. The component is available in TO-3 metal packages.

Feature Summary

• Integrated thermal shutdown circuitry prevents damage during overheating conditions
• Built-in current limiting protects against short circuits and overloads
• Requires minimal external components for stable operation

Applications

• Negative power supply regulation for digital logic cards
• Local voltage regulation in industrial control systems
• Power conditioning for analog signal processing circuits

Procurement Notes

Verify the specific suffix code on the datasheet to confirm package type and temperature grade. Ensure the ordering part number matches the required lead time and availability status. Confirm RoHS compliance requirements if applicable to the final assembly process.

Selection Notes

Select this component when a fixed negative voltage rail is required for high-current applications. Consider the thermal management needs due to the metal package construction. Verify that the input voltage does not exceed the maximum rating under all operating conditions.

Part Context

This regulator belongs to the LM120/LM320-N series of three-terminal negative regulators. These devices are designed as drop-in replacements for older negative regulator designs, offering improved reliability and simplified circuit implementation without sacrificing performance or current capability.

Replacement Considerations

LM320H-12: Commercial grade version with similar electrical characteristics but potentially different temperature specifications.