STMicroelectronics LM317LZ Adjustable Linear Voltage Regulator 100mA TO-92-3 Package

Revolutionizing Power Management: STMicroelectronics LM317LZ Linear Regulator

In the ever-evolving landscape of electronic circuit design, precision power management remains a cornerstone of reliable system performance. The STMicroelectronics LM317LZ emerges as a versatile solution for engineers seeking adjustable voltage regulation in a compact TO-92-3 package. This three-terminal positive voltage regulator has established itself as an industry standard through its combination of adaptability, protection features, and thermal reliability.

Core Functionality and Design Advantages

Engineered to deliver stable output voltages despite fluctuating input conditions, the LM317LZ operates within a remarkable 1.2V to 37V adjustable range while maintaining a constant 100mA output current capacity. Its through-hole TO-92-3 package combines mechanical durability with efficient thermal dissipation, making it suitable for both prototyping and production environments. The device's inherent design eliminates the need for external components in basic configurations, though designers can enhance performance through optional capacitors and resistor dividers.

Advanced Protection Architecture

Beyond its fundamental regulation capabilities, the LM317LZ integrates multiple safeguard mechanisms to ensure system longevity. Its patented thermal shutdown circuitry automatically reduces output current when die temperatures exceed safe thresholds, while built-in current limiting prevents damage from accidental short circuits. These protection features work synergistically to maintain operational integrity in demanding environments ranging from industrial control systems to automotive electronics.

The device's impressive 40V input tolerance creates unique design flexibility, enabling use in applications that bridge traditional voltage domains. From battery backup systems operating at 12V to industrial equipment requiring 24V rails, the LM317LZ maintains regulation accuracy within ±1.5% across its operational range. This precision, combined with its 80dB power supply rejection ratio, makes it particularly effective in noise-sensitive analog circuits.

Market Applications and Design Versatility

With its proven reliability in harsh environments, the LM317LZ finds applications across multiple sectors. Electronics hobbyists value its simplicity in breadboard projects, while professional engineers specify it for:

• Adjustable laboratory power supplies
• Industrial process control systems
• Telecom equipment voltage sequencing
• Medical device power rails
• Automotive sensor interface circuits

Manufacturers benefit from its TO-92-3 package compatibility with standard PCB assembly processes, while the active product status ensures long-term supply chain stability. The device's thermal characteristics allow operation in elevated temperature environments without derating, maintaining full functionality up to its 125°C maximum junction temperature.

Tags: Linear Voltage Regulator, TO-92 Package, 100mA Regulator, Adjustable Power Supply, Through Hole Mount IC