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Product Detailed Parameters
- Description：IC REG LINEAR NEG ADJ 1.5A DIE
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Output Configuration：Negative
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：50V
- Voltage - Output (Min/Fixed)：-1.2V
- Voltage - Output (Max)：-37V
- Voltage Dropout (Max)：-
- Current - Output：1.5A
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：-
- PSRR：77dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：Die
- Supplier Device Package：Die
- Grade：-
- Qualification：-
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Overview
The LM137HVK MD8 is a three-terminal adjustable negative voltage regulator manufactured by Texas Instruments. It provides an output voltage range from -1.2V to -47V with an internal current limit of 0.5A. The device features thermal regulation and protection against overloads, shorts, and excessive junction temperature. It operates within a junction temperature range of -65°C to 150°C and utilizes a TO-3 metal can package.
Feature Summary
- Integrated thermal limiting prevents device damage during overload or short circuit conditions
- Internal current and power limiting protects the regulator without requiring external heat sinking for basic operation
- Adjustable output voltage capability across a wide negative range
Applications
- Military and aerospace electronic systems requiring radiation-hardened components
- High-reliability industrial power supplies
- Equipment operating in extreme environmental conditions
Procurement Notes
Verify that the specific suffix 'HV' denotes high-voltage ratings (40V differential) rather than standard versions. Confirm the 'MD8' designation corresponds to the correct military grade specification and hermetic seal requirements. Ensure the ordering information matches the exact pinout and package dimensions required for the target application.
Selection Notes
Select this component when high reliability and radiation tolerance are critical. The LM137HVK MD8 is suitable for applications where standard commercial regulators may fail due to harsh environments. Consider the TO-3 package for effective heat dissipation and mechanical robustness in demanding installations.
Part Context
This part belongs to the LM137 family of three-terminal adjustable negative regulators. The 'H' indicates a metal can package, while 'K' typically signifies a military grade or specific processing option. The 'MD8' suffix often relates to specific military procurement codes or lot traceability standards used by Texas Instruments for defense contracts.
Replacement Considerations
Direct replacements include other LM137 variants such as LM137QML or LM137JAN for similar military specifications. Verify that substitute parts maintain the same TO-3 package and hermetic sealing capabilities to ensure physical and electrical compatibility.
