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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 5A DIE
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：1.2V
- Voltage - Output (Max)：35V
- Voltage Dropout (Max)：-
- Current - Output：5A
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：-
- PSRR：-
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：Die
- Supplier Device Package：Die
- Grade：-
- Qualification：-
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Overview
The LM138KG-MD8 is a military-grade, adjustable three-terminal positive voltage regulator from the LM138QML series. It delivers an output current exceeding 5 A with an adjustable output voltage range of 1.2 V to 32 V. The device features internal current limiting and thermal overload protection. It operates within a temperature range of -55°C to 125°C and is housed in a TO-99 package.
Feature Summary
- Adjustable output voltage capability over a wide range
- High output current capacity exceeding 5 amperes
- Integrated thermal overload and current limit protection
- Qualified for extended military temperature environments
Applications
- Military power supply systems
- Aerospace electronic equipment
- High-reliability industrial regulators
Procurement Notes
Verify the component matches the specific LM138QML series requirements. Confirm the package type is TO-99 and the suffix indicates the correct die sale or wafer configuration. Ensure the supplier provides traceability documentation suitable for military or aerospace procurement standards.
Selection Notes
Select this regulator when high current delivery and wide input voltage tolerance are required in harsh environments. It serves as a robust alternative to standard commercial regulators where reliability under extreme temperatures is critical. Ensure the design accounts for the necessary heat dissipation given the high current capabilities.
Part Context
This part belongs to the LM138 family of adjustable voltage regulators. The LM138QML designation indicates qualification to military specifications. It shares functional similarities with the LM317 but offers higher current handling and ruggedized construction suitable for defense applications.
Replacement Considerations
Direct replacements include other LM138 variants within the QML series. Verify pinout compatibility and thermal characteristics before substituting. Cross-reference with LM138KG-MW8 if different packaging is acceptable.
