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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 500MA TO39-3
- Series：-
- Mfr：Texas Instruments
- Package：Bulk
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：41.25V
- Voltage - Output (Min/Fixed)：1.2V
- Voltage - Output (Max)：37V
- Voltage Dropout (Max)：-
- Current - Output：500mA
- Current - Quiescent (Iq)：3 mA
- Current - Supply (Max)：-
- PSRR：65dB ~ 60dB (2.4kHz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Through Hole
- Package / Case：TO-205AD, TO-39-3 Metal Can
- Supplier Device Package：TO-39-3
- Grade：-
- Qualification：-
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Overview
The LM117HRQMLV is a space-grade, three-terminal adjustable linear regulator manufactured by Texas Instruments. It supports an input voltage range from 4.2 V to 60 V and delivers up to 1.5 A of output current. The device features a nominal dropout voltage of 1.5 V and operates within a temperature range of -55 °C to 125 °C. Packaged in a hermetic TO-39 metal can with three pins, it offers line regulation of 0.04 %/V and load regulation of 1.25%. The maximum differential input-to-output voltage is rated at 40 V.
Feature Summary
- Hermetically sealed TO-39 metal package designed for radiation-tolerant space applications
- Adjustable output voltage capability using external resistors
- High input voltage tolerance supporting up to 60 V operation
- Integrated thermal overload protection for enhanced reliability
Applications
- Spacecraft power distribution systems
- Avionics voltage regulation
- Radiation-hardened electronic subsystems
Procurement Notes
Verify the specific QML qualification level and lot traceability documentation upon order confirmation. Ensure that the procurement channel provides valid Certificate of Conformance (CoC) and material declarations. Confirm that the delivered units match the exact LM117HRQMLV designation to avoid substitution errors in critical aerospace hardware.
Selection Notes
Select this component when high input voltage handling and radiation hardness are required. The TO-39 package necessitates appropriate mounting and thermal management strategies. Verify that the system's ground reference and heat sinking capabilities align with the device's thermal resistance characteristics. Ensure the application does not exceed the 40 V differential input-to-output limit.
Part Context
This regulator belongs to the LM117QML family of military and space-grade components. It shares functional similarities with commercial LM117 variants but differs significantly in packaging, testing standards, and environmental resilience. The QML designation indicates compliance with strict quality assurance protocols suitable for long-duration missions.
Replacement Considerations
Direct replacements include other LM117QML variants such as LM117HRLQMLV or LM117HVHRQMLV, provided pinout and package compatibility are confirmed. Cross-referencing with MIL-SPEC equivalents requires careful evaluation of electrical parameter margins.
