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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 5A WAFERSALE
- Series：-
- Mfr：Texas Instruments
- Package：Bulk
- 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)：-
- Current - Supply (Max)：-
- PSRR：60dB (120Hz)
- Control Features：-
- Protection Features：Over Temperature
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：Die
- Supplier Device Package：Wafersale
- Grade：-
- Qualification：-
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Overview
The LM138KG-MW8 is a military-grade, 5-amp adjustable linear voltage regulator manufactured by Texas Instruments. Designed for harsh environments, it operates within an input voltage range of 4.2 V to 40 V and provides an adjustable output from 1.2 V to 32 V. The component supports a maximum output current of 5 A with a power dissipation rating of 50 W. It functions reliably across an extended temperature range from -55°C to +125°C. Key electrical specifications include a line regulation of 0.01%/V and load regulation of 0.3%. This device is intended for high-reliability applications requiring stable positive voltage regulation under extreme conditions.
Feature Summary
- Military/aerospace qualification for harsh environment reliability
- High current capability of 5 amps with adjustable output
- Extended operational temperature range from -55°C to +125°C
Applications
- Military electronic systems
- Aerospace instrumentation
- Harsh environment power management
Procurement Notes
Verify the specific suffix MW8 indicates bare die or wafer form factor as per official documentation. Confirm military grade compliance and lot traceability requirements before procurement. Ensure handling procedures match the component's physical format. Check for restricted availability status directly with the manufacturer or authorized distributors. Validate that the ordering information matches the exact part number LM138KG-MW8.
Selection Notes
Select this component when military-grade reliability and high current capacity are required in extreme temperatures. It serves as a robust alternative to commercial regulators in aerospace and defense projects. Consider the TO-3 package or bare die variant depending on integration needs. Ensure thermal management strategies align with the 50 W power dissipation rating. Verify compatibility with existing circuit designs for adjustable voltage ranges between 1.2 V and 32 V.
Part Context
The LM138KG-MW8 belongs to the LM138 family of 5-amp adjustable linear regulators. It is specifically engineered for military and aerospace applications, offering enhanced durability compared to standard commercial versions. The 'KG' designation typically refers to the TO-3 metal can package, while 'MW8' may indicate a specific wafer or die configuration. This part ensures consistent performance in demanding operational scenarios where standard components might fail.
Replacement Considerations
Consider LM138K-MIL for equivalent military-grade performance in a standard TO-3 package. Evaluate LM138KG for similar specifications if the MW8 suffix denotes a specific packaging variant. Verify pinout compatibility and thermal characteristics when substituting. Ensure the replacement meets the same -55°C to +125°C operating temperature range.
