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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/NOPB is a positive three-terminal adjustable linear regulator manufactured by Texas Instruments. It operates within an input voltage range up to 40V and provides an adjustable output voltage from 1.25V to 37V. The device delivers a maximum output current of 1.5A. It features internal overload protection including current limiting, thermal shutdown, and safe area compensation. The component is housed in a TO-3 metal can package suitable for through-hole mounting and supports an operating temperature range from 0°C to 125°C.
Feature Summary
- Provides stable positive adjustable output voltage regulation with high line and load regulation performance.
- Incorporates comprehensive internal protection mechanisms against overcurrent conditions, excessive junction temperature, and unsafe operating region violations.
- Designed for robust operation in industrial environments with extended high-temperature capability.
Applications
- Adjustable power supply circuits requiring precise voltage control
- Local regulation for card distribution systems
- General-purpose linear voltage regulation in industrial equipment
Procurement Notes
Verify the specific manufacturer lot code and RoHS compliance status upon receipt, as legacy packages may vary. Confirm that the TO-3 metal can package matches your thermal management requirements and PCB layout constraints. Ensure the supplier provides valid traceability documentation for this military-grade derived component.
Selection Notes
Select this component when a high-current adjustable regulator with a metal case is required for superior heat dissipation compared to plastic packages. Consider the TO-3 footprint availability and mounting hardware needs. Evaluate if the 40V maximum input rating meets your system's peak voltage transients without exceeding absolute maximum ratings.
Part Context
This part belongs to the LM117/LM317 family of three-terminal adjustable regulators. It shares functional similarities with the LM317 but is optimized for higher voltage inputs and ruggedized packaging. The NOPB suffix indicates lead-free construction compliant with environmental directives.
Replacement Considerations
LM317H/NOPB: Functionally similar adjustable regulator with identical pinout and electrical characteristics, differing primarily in package thermal resistance and historical manufacturing lineage.
