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Product Detailed Parameters
- Description：IC REG LINEAR -12V 1.5A TO3-2
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Output Configuration：Negative
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：-25V
- Voltage - Output (Min/Fixed)：-12V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：1.5A
- Current - Quiescent (Iq)：4 mA
- Current - Supply (Max)：-
- PSRR：56dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-204AA, TO-3
- Supplier Device Package：TO-3-2
- Grade：-
- Qualification：-
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Overview
The LM120K-12/883 is a military-grade, Series 3-terminal negative voltage regulator manufactured by National Semiconductor. It provides a fixed output voltage of -12V with a maximum output current capability of 1.5A. The device operates within an extended temperature range of -55°C to 150°C and utilizes a TO-3-2 package. Designed for high-reliability applications, it features internal short-circuit protection and thermal overload safeguards.
Feature Summary
- Fixed negative output voltage regulation
- High current delivery capability up to 1.5A
- Extended military-grade temperature operation
- Integrated short-circuit and thermal protection
Applications
- Military electronic systems requiring stable negative power rails
- Aviation instrumentation and control circuits
- Industrial equipment operating in extreme environments
- Spacecraft avionics power distribution
Procurement Notes
Verify the specific suffix and revision code against the manufacturer's official datasheet to ensure compliance with MIL-PRF-38534 or equivalent military specifications. Confirm that the TO-3-2 package dimensions and terminal configurations match the design requirements. Request full traceability documentation and lot history for critical aerospace or defense procurement channels.
Selection Notes
Select this component when a robust, fixed negative voltage source is required for high-current loads in harsh environments. Ensure the input voltage exceeds the dropout voltage while respecting the maximum rating. Consider thermal management strategies due to the power dissipation inherent in linear regulation at high currents.
Part Context
This part belongs to the LM120 series of three-terminal negative regulators, designed for ruggedized applications. It serves as a reliable alternative to standard commercial regulators in sectors demanding higher reliability and wider operational temperature ranges.
Replacement Considerations
Direct substitutes include other military-specification negative regulators from the same family, such as the LM120K-5.0/883 for different voltage requirements. Verify pinout compatibility and thermal characteristics before substitution.
