Texas Instruments

LM117H/NOPB

LM117H/NOPB Description

The LM117H/NOPB by Texas Instruments is a high-performance, adjustable positive linear voltage regulator designed for demanding applications requiring precise voltage regulation. With an input voltage range up to 40V and an adjustable output voltage from 1.25V to 37V, it delivers a robust 1.5A output current, making it suitable for powering a wide variety of electronic circuits. Housed in a rugged TO-3 package, this regulator is built for reliability in harsh environments. Its low quiescent current (5 mA) and high PSRR (80dB to 65dB at 120Hz) ensure stable operation with minimal noise, critical for sensitive analog and digital systems.

LM117H/NOPB Features

• Adjustable Output: Fine-tune voltage from 1.25V to 37V for flexible design integration.
• High Current Capability: Delivers 1.5A continuous current with over-current, over-temperature, and short-circuit protection for enhanced durability.
• Excellent Line/Load Regulation: Maintains stable output under varying input and load conditions.
• Low Dropout Voltage: Optimized for efficiency in low-voltage differential applications.
• Wide Operating Temperature Range: Suitable for industrial and automotive environments.
• RoHS3 & REACH Compliant: Meets stringent environmental and safety standards.

LM117H/NOPB Applications

Ideal for precision power supply designs, the LM117H/NOPB excels in:

• Industrial Control Systems: Stable voltage for PLCs, motor drives, and instrumentation.
• Automotive Electronics: Reliable power management in infotainment and engine control units.
• Test & Measurement Equipment: Low-noise regulation for sensitive analog circuits.
• Renewable Energy Systems: Voltage regulation in solar/wind power converters.
• Retrofit/Upgrade Projects: Drop-in replacement for legacy TO-3 regulators due to its Last Time Buy status.

Conclusion of LM117H/NOPB

The LM117H/NOPB stands out as a versatile, high-current linear regulator with superior protection features, wide adjustability, and industrial-grade robustness. Its TO-3 packaging and TI’s proven reliability make it a preferred choice for engineers needing a durable, high-performance solution in critical applications. While classified as Last Time Buy, it remains a top-tier option for designs requiring long-term stability and legacy compatibility.