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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 1.5A TO3
- Series：-
- Mfr：Texas Instruments
- Package：Bulk
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：37V
- Voltage Dropout (Max)：-
- Current - Output：1.5A
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：-
- PSRR：80dB ~ 65dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-205AD, TO-39-3 Metal Can
- Supplier Device Package：TO-3
- Grade：-
- Qualification：-
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Overview
The LM117H is a three-terminal adjustable positive linear voltage regulator manufactured by Texas Instruments. It provides an output voltage range from 1.25 V to 37 V with a maximum load current of 1.5 A. The device operates within an ambient temperature range of 0°C to +125°C and features internal current limiting, thermal shutdown, and safe area protection. It utilizes a TO-39 metal can package for through-hole mounting.
Feature Summary
- Adjustable output voltage capability across a wide range
- Integrated overload protection mechanisms including current limiting and thermal shutdown
- Robust metal can packaging suitable for high-power applications
Applications
- High-performance local regulation in distributed power systems
- Programmable output power supplies
- Precision tracking regulators requiring stable voltage adjustment
Procurement Notes
Verify the specific datasheet revision and manufacturer lot codes upon order confirmation. Confirm that the TO-39 package variant matches the required pinout and mechanical dimensions for the target PCB or chassis mount. Ensure compliance with RoHS directives if applicable to the final assembly requirements.
Selection Notes
Select this component when a robust, high-current adjustable regulator is needed for through-hole implementation. Consider the thermal dissipation capabilities of the TO-39 package relative to the expected load current and ambient temperature conditions. Verify input voltage constraints to ensure operation within the specified differential voltage limits.
Part Context
This part belongs to the LM117/LM317 family of three-terminal adjustable regulators. It shares functional similarities with commercial variants but is distinguished by its specific industrial-grade temperature rating and metal can construction. The series is widely recognized for its reliability in standard linear regulation tasks.
Replacement Considerations
LM117H/NOPB serves as a direct equivalent within the same product line. Cross-manufacturer alternatives such as the LM317HV may offer similar electrical characteristics but require verification of package compatibility and thermal performance specifications.
